Page  80 ï~~80 THE MICHIGAN BOTANIST Vol. 46 NOTEWORTHY COLLECTIONS MINNESOTA Allium hollandicum Fritsch (Liliaceae, treated as Alliaceae by some). An ornamental onion. Previous knowledge. Allium hollandicum is a non-rhizomatous, bulbous herbaceous perennial that most resembles the central Asian native A. jesdianum Boiss. and Buhse, but seems to be of European horticultural origin and was first described by Fritsch (1993). These plants, cultivated for their showy inflorescences, have sometimes been misidentified as A. aflatunense B. Fedtsch. (Fritsch 1993). Although the name A. xhollandicum has occasionally been used in horticulture, Friesen et al. (1997) found no evidence that the popular A. hollandicum cultivar 'Purple Sensation' contains genomes from more than one species. McNeal and Jacobsen (2002) did not include A. hollandicum among the alien species escaped in North America; it has escaped from cultivation in Germany, but has not become naturalized there (Reinhard Fritsch, personal communication). Significance. A population of A. hollandicum in Duluth, Minnesota seems to be the first to be reported growing outside of cultivation in North America. It was found at a sunny site within a dense growth of taller herbaceous perennials such as Alopecurus pratensis L., Bromus inermis Leysser, and Tanacetum vulgare L. on well-drained medium-textured soil. The onion plants developed early, and their leaves withered before the other species overgrew them enough to produce considerable shading. Abundant seed production was observed. There were eight plants in flower in 2001, 14 in 2005, and 26 in 2006, despite some being removed for specimens over this interval, as well as others that did not flower. Spatial spreading of this colony has been limited to within a few m2. Many plants were pulled out by an unknown person after the count was made in 2006. The population is in a residential neighborhood, but does not border cultivated ground. Diagnostic characters. Among tall onions with violet anthers, deep purple perianths in fairly large and dense umbels, and strap-shaped basal leaves, A. hollandicum may be distinguished by the combination of equal-length pedicels and typically only two ovules per locule. Frequently just one of these two ovules matures as a seed. The dimensions given by Fritsch (1993) are from cultivated material, and plants grown with sparser resources may be less robust (Reinhard Fritsch, personal communication). The Duluth plants had smaller measurements than those of the type (Fritsch 1993), except for height, and thus trend toward A. jesdianum dimensionally. Specimen citations. Minnesota. St. Louis Co.: E side of Brainerd Ave. below Lyons St., Duluth, SE NE Sec. 15, T50N R14W, (all this location), in flower, 3 Jun 2001, Schimpf 305 (DUL); in flower, 13 Jun 2004, Schimpf 356 (DUL); in

Page  81 ï~~2007 THE MICHIGAN BOTANIST 81 flower, 10 Jun 2005, Schimpf 395 (DUL); in fruit, 21 Jun 2005, Schimpf 404 (DUL, MIN). Centaurea phrygia L. (Asteraceae). Wig Knapweed. Previous knowledge. Centaurea phrygia is a herbaceous perennial that is native to Europe and established as a weed in the east-central United States (Keil and Ochsmann 2006). Significance. Populations of C. phrygia from two locations in rural northeastern Minnesota are apparently the first known from the upper Great Lakes region. Both were growing with C. xmoncktonii Britton, which was much more abundant. Keil and Ochsmann (2006) noted that some individuals that are determined as C. phrygia may represent extreme variants within the C. jacea L. complex, which includes C. xmoncktonii. Both of the C. phrygia populations produced abundant seed. The roadside population was subjected to control actions after these collections were made. Specimen citations. Minnesota. St. Louis Co.: occasional across a few ha of inactive hayfield on fine-textured soil, Angora Township, NE SE Sec. 8, T61N R18W, in fruit, 11 Sep 2005, Schimpf424 (DUL, MIN), 1 Oct 2005, Pomroy, Schimpf and Barnes 2368 (DUL, MIN); same location, in flower, 15 Jul 2006, Pomroy, Schimpf and Barnes 2420 (DUL, MIN); uncommon in narrow strip on both sides of highway 73, Linden Grove Township, NW Sec. 2, T62N R20W, in fruit, 11 Sep 2005, Schimpf 425 (DUL, MIN), 1 Oct 2005, Pomroy, Schimpf and Barnes 2369, 2370 (DUL, MIN). Verbena officinalis L. (Verbenaceae). European Vervain. Previous knowledge. Verbena officinalis is an annual that is native to Europe; introduced to North America as a medicinal herb, it is naturalized in southeastern and Atlantic coastal states (Gleason and Cronquist 1991). It has also been reported from western states (USDA 2006). It was collected in the 1890s in Detroit, Michigan, but not known from that state since then (Voss 1996). Although USDA (2006) indicated that it is known outside of cultivation in Wisconsin, the Wisconsin State Herbarium did not report it from the state (Wisflora 2006). Scoggan (1979) did not include it in the flora of Canada. Significance. A population of V. officinalis in rural northeastern Minnesota appears to be the first known outside of cultivation in Minnesota, and perhaps also in the upper Great Lakes region. The site is a rock garden for flowers, with sandy soil. This species, never deliberately grown there, was first noticed in 2004 and seen again in 2005 and 2006. Approximately two dozen plants were pulled out each year. This indicates that this vervain is capable of persisting, and potentially spreading, in the region. Specimen citation. Minnesota. St. Louis Co.: North Star Township, NEY SE Sec. 5, T53N R13W, in flower and fruit, 14 Sep 2005, Pomroy 2311 (DUL, MIN), determined by David Schimpf and Deborah Pomroy.

Page  82 ï~~82 THE MICHIGAN BOTANIST Vol. 46 Sedum aizoon L. (Crassulaceae). Aizoon Stonecrop. Previous knowledge. Sedum aizoon is a succulent herbaceous perennial that is native to northern Asia and grown ornamentally in North America (Clausen 1975). It was reported as escaped in the United States only for Massachusetts (USDA 2006). Scoggan (1978) listed it as escaped in just a few locations in Canada, near settlements in Alberta and Saskatchewan. Clausen (1975) did not include it among the 13 alien species of Sedum that he regarded as naturalized in North America. Webb et al. (1993) reported it as locally naturalized in northern and central Europe. Significance. This is apparently the first report of S. aizoon from outside of cultivation in Minnesota and a large surrounding region. The plants were very common over about 700 m2, the total area split about equally by a road. On one side of the road these plants were on residential lots, mostly exposed to the sun, and on the other side they grew in the partial shade of a pine plantation on church grounds. Bedrock near the surface makes the soil shallow on much of the occupied area, but the species was also succeeding in soil deep enough to use for normal gardens. The population appeared to be vigorous, as control efforts on the residential side have met with little success. These stonecrop plants grew to heights of 4 dm, and thrived in tall, non-managed herbaceous cover; they also persisted in a non-flowering condition where regular mowing kept them short. Specimen citation. Minnesota. St. Louis Co.: both sides of Morris Thomas Rd. just W of Piedmont Ave., Duluth, SE SE Sec. 30, T50N R14W, in flower, 25 Jun 2006, Pomroy, Hansen, and Barnes 2321 (DUL). Cardamine flexuosa Withering (Brassicaceae). Woodland Bittercress. Previous knowledge. Rollins (1993) described Cardamine flexuosa as a biennial to short-lived perennial that is native to Europe and introduced to North America. The reported collection sites closest to Minnesota (USDA 2006) include older ones in upper Michigan (Voss 1985). In 2002 and 2003 the apparently first collections from Wisconsin were made, all from horticultural settings in four counties in the southeastern half of the state (Vincent and Lammers 2005, Wisflora 2006). Significance. C. flexuosa was found in the Twin Cities metropolitan area, the apparent first report for Minnesota. These plants were growing in decorative (golden/tan color) crushed limestone pavement in partial sun at a suburban residence. They seemed to be growing as annuals, with fibrous roots and a height of less than 10 cm; such variants have sometimes been given taxon status: C. debilis D. Don or C. flexuosa subsp. debilis O. E. Schulz (Rollins 1993). C. debilis has been reported from Iowa (USDA 2006). These weedy (Rollins 1993) inconspicuous plants are easily overlooked and may be more widespread in Minnesota, especially if the seeds were introduced with the crushed rock. Specimen citation. Minnesota. Hennepin Co.: Plymouth, near center Sec. 32, T 118N R22W, in flower and fruit, 3 Jun 2006, Schimpf 421 (DUL, MO), determined by Ihsan Al-Shehbaz 3 Jul 2006.

Page  83 ï~~2007 THE MICHIGAN BOTANIST 83 Silene csereii Baumgarten (Caryophyllaceae). Biennial Campion. Previous knowledge. Silene csereii is an annual or biennial native to Europe and naturalized as a weed in northern United States and southern Canada (Morton 2005). Major North American treatments (e.g., Hitchcock and Cronquist 1973; Larson 1986; Morton 2005) described the leaf blades as ranging up to 8.5 cm long x 4 cm wide. Significance. A few S. csereii plants with blades up to 15 x 8 cm were found in an industrial area of Duluth, Minnesota. The well-drained soil was evidently highly fertile, because members of other weedy species growing on it were likewise robust. Measurement of the S. csereii specimens held by MIN revealed several from Minnesota (Holzinger s.n., Galatowitsch 268), Wisconsin (Swanson 647), and North Dakota (Brenckle 1236) with blades 10 x 4 cm to 12 x 5 cm, well above the published upper size range. Whether this larger size has a genetic basis or is geographically limited would require further investigation. Specimen citation. Minnesota. St. Louis Co.: Rice's Point, Duluth, NEV NE% Sec. 4, T49N R14W, 2 Jul 2005, Schimpf 407 (DUL, MIN). Malus baccata (L.) Borkhausen var. baccata (Rosaceae). Siberian Crab-apple. Previous knowledge. Malus baccata is a small tree that is native to much of Asia (Cuizhi and Spongberg 2003). It is cultivated in North America (Bailey 1949) for its white floral display. The fruits are small and not of culinary use. M. baccata has been reported growing outside of cultivation in many states in the northeastern United States, as well as Minnesota (USDA 2006) and eastern Canada (Scoggan 1978). Significance. The two previously known Minnesota collections appear not to be of M. baccata; a Goodhue Co. specimen in flower, 1977, Clemants 634 (MIN), has very tomentose pedicels, and a St. Louis Co. specimen, 1998, Walton 3377 (DUL) has fruits that are far too large, some of which retain some calyx lobes. Both may represent the results of hybridizations with domestic apple, M. pumila Miller, in a recent generation. Newer collections from St. Louis Co. appear to be the first M. baccata known outside of cultivation from Minnesota. Three trees were found rooted within 1 m of each other on a steep, shaded southfacing ledge of a large outcrop of mafic igneous rock. This spot is surrounded by a mosaic of brushy woodland and herbaceous vegetation across approximately 1 km2 of bedrock exposures and shallow soils. The trees' location is remote, separated from the nearest settlement, current or historical, by about 1 km (much farther in almost all directions), and not near any road or trail. A concentration of other alien plants with small fleshy fruits (Rhamnus cathartica L., Lonicera spp.) in the same habitat suggests that birds frequently move seeds to this outcrop, the vegetation of which was otherwise strongly dominated by native species. Avian dispersal from a cultivated source is the most likely explanation for this occurrence of M. baccata, which Harris et al. (2002) described as a birddispersed species. One tree was 7 cm diameter, one was 2.5 cm diameter, and a non-flowering one was 1 cm diameter. The fruits were lustrous, with one lateral

Page  84 ï~~84 THE MICHIGAN BOTANIST Vol. 46 hemisphere red and the other yellow, up to 9 mm diameter, and devoid of remnant calyx lobes. Some of the largest fruits contained one maturing seed. Specimen citations. Minnesota. St. Louis Co.: Midway Township, NEY SW Sec. 33, T49N R15W, in flower, 10 Jun 2004, Schimpf 354 (DUL, MIN); same location, fruit ripe, 20 Aug 2005, Schimpf 411 (DUL, MIN). MICHIGAN Malus sieboldii (Regel) Rehder (Rosaceae). Toringo Crab-apple. Previous knowledge. Malus sieboldii is a tall shrub or short tree native to China, Korea, and Japan (Cuizhi and Spongberg 2003). It is cultivated in North America for its ornamental fruit and pinkish white floral display (Bailey 1949). It has been reported from outside of cultivation in Illinois, several northeastern states (USDA 2006), and southern Wisconsin (Wisflora 2006). Significance. This is apparently the first reported occurrence of M. sieboldii outside of cultivation in Michigan. The population inhabited a band near the bottom of a south-facing hill, between a long-established Pinus resinosa Aiton plantation above and a wetland below. It consisted of at least 20 mature trees, along with hundreds of saplings and thousands of seedlings. The site was still dominated by native vegetation, although Elaeagnus umbellata Thunb. was also established and spreading there. The location of the former logging town of Barclay is about 200 meters to the west. Specimen citations. Michigan. Ontonagon Co.: Barclay Pond, NW NW Sec. 13, T46N R39W, immature fruit, 22 Jul 2006, Garske 557 (DUL, MICH); same location, ripe fruit, 16 Sep 2006, Garske 588 (DUL, MICH). Carduus crispus L. (Asteraceae). Welted thistle. Previous knowledge. Carduus crispus is a weedy Eurasian biennial reported from many central and northeastern United States and eastern provinces of Canada (Keil 2006), but not Michigan, Wisconsin, or Minnesota. Significance. A population of C. crispus apparently represents the first known occurrence of this species in Michigan. It consisted of numerous plants, scattered along both sides of an approximately 260 m length of gravel road. The site is surrounded by National Forest land. Marenisco, the nearest town, lies 9 km away. The population has been able to persist and apparently expand on moist clay-gravel soil, in significant shade from northern hardwoods. Several small clearings adjacent to this road may facilitate this plant's further spread. The population was reported to the Ottawa National Forest in fall 2003, and may be controlled or eradicated in the future. Specimen citation. Michigan. Gogebic Co.: forest road 8170, Marenisco Township, NW NE Sec. 28, T46N R44W, in flower, 1 Aug 2003, Garske 413 (DUL, MICH).

Page  85 ï~~2007 THE MICHIGAN BOTANIST 85 WISCONSIN Mimulus moschatus Douglas (Scrophulariaceae, treated as Phrymaceae by some). Muskflower. Previous knowledge. Mimulus moschatus is native to western North America, where it is part of a complex of 13 very closely related species (Whittall et al. 2006). It also has scattered occurrences in eastern North America, some of which are thought to be escapes from cultivation (Gleason and Cronquist 1991). Some earlier authors considered at least the upper Michigan, Quebec and Newfoundland occurrences to be native (Marquis and Voss 1981), and this species is classified as endangered by the states of Massachusetts and New Hampshire (Natural Heritage and Endangered Species Program 2006; New Hampshire Natural Heritage Bureau 2006). In Michigan it inhabits "Muddy or wet ditches, creeks, springy banks, borders of swamps and ponds; moist openings, trails, and roadsides in woods." (Voss 1996). Significance. This is apparently the first report of M. moschatus outside of cultivation in Wisconsin. At this site it was occasional to abundant in ditches and woods edges along a highway and several gravel side roads. This highway cuts through small seeps and intermittent stream beds; seasonal and permanent residences are fairly frequent along it. Given that this species has long been in cultivation (Pennell 1935) and that the area in which it was found has long been settled, it seems more likely that this M. moschatus population is introduced, rather than native but just recently discovered. Specimen citations. Wisconsin. Bayfield Co.: along state highway 13 ca. 1 km N of Whiting Rd., Bayview Township, SEY NE Sec. 33, T50N R4W, in flower, 3 Jul 2001, Garske 253 (OSH, WIS); same location, 6 Jul 2001, Garske 266 (DUL). LITERATURE CITED Bailey, L.H. (1949). Manual of Cultivated Plants, revised edition. Macmillan Company, New York. 1116 pp. Clausen, R.T. (1975). Sedum of North America North of the Mexican Plateau. Cornell University Press, Ithaca, NY. 742 pp. Cuizhi, G. and Spongberg, S.A. (2003). Malus Miller. Pp. 179-189, In Flora of China, volume 9. (Z. Wu and P.H. Raven, editors). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis. Friesen, N., Fritsch, R. and Bachmann, K. (1997). Hybrid origin of some ornamentals of Allium subgenus Melanocrommyum verified with GISH and RAPD. Theoretical and Applied Genetics 95: 1229-1238. Fritsch, R. (1993). Taxonomic and nomenclatural remarks on Allium L. subgen. Melanocrommyum (Webb and Berth) Rouy sect. Megaloprason Wendelbo. Candollea 48: 417-430. Gleason, H. A. and Cronquist, A. (1991). Manual of Vascular Plants of Northeastern United States and Adjacent Canada, second edition (corrected 2004). New York Botanical Garden, New York. xlvi + 993 pp. Harris, S. A., Robinson, J. P. and Juniper, B. E. (2002). Genetic clues to the origin of the apple. Trends in Genetics 18: 426-430. Hitchcock, C. L. and Cronquist, A. (1973). Flora of the Pacific Northwest, an Illustrated Manual. University of Washington Press, Seattle. xix + 730 pp.

Page  86 ï~~86 THE MICHIGAN BOTANIST Vol. 46 Keil, D. J. (2006). Carduus Linnaeus. Pp. 91-94, In Flora of North America, North of Mexico, volume 19, Magnoliophyta: Asteridae (in part): Asteraceae (part 1). (Flora of North America Editorial Committee, editors). Oxford University Press, New York. Keil, D. J. and Ochsmann, J. (2006). Centaurea Linnaeus. Pp. 181-194, In Flora of North America, North of Mexico, volume 19, Magnoliophyta: Asteridae (in part): Asteraceae (part 1). (Flora of North America Editorial Committee, editors). Oxford University Press, New York. Larson, G. E. (1986). Caryophyllaceae Juss. Pp. 192-214, In Flora of the Great Plains. (Great Plains Flora Association, editors). University Press of Kansas, Lawrence, KS. Marquis, R. J. and Voss, E. G. (1981). Distributions of some western North American plants disjunct in the Great Lakes region. The Michigan Botanist 20: 62-82. McNeal, D. W., Jr. and Jacobsen, T. D. (2002). Allium Linnaeus. Pp. 224-276, In Flora of North America, North of Mexico, volume 26, Magnoliophyta: Liliidae: Liliales and Orchidales. (Flora of North America Editorial Committee, editors). Oxford University Press, New York. Morton, J. K. (2005). Silene Linnaeus. Pp. 166-214, In Flora of North America, North of Mexico, volume 5, Magnoliophyta: Caryophyllidae, part 2. (Flora of North America Editorial Committee, editors). Oxford University Press, New York. Natural Heritage and Endangered Species Program. (2006). Massachusetts List of Endangered, Threatened, and Special Concern Species. New Hampshire Natural Heritage Bureau. (2006). Rare Plant List for New Hampshire. DREDDivision of Forests and Lands, Concord, NH. forestandlands/bureaus/naturalheritage/documents/webplantsgeneral.pdf Pennell, F. W. (1935). The Scrophulariaceae of Eastern Temperate North America. Academy of Natural Sciences of Philadelphia, Monograph Number 1. xiv + 659 pp. Rollins, R. C. (1993). The Cruciferae of Continental North America. Stanford University Press, Stanford, CA. xvi + 976 pp. Scoggan, H. J. (1978). Flora of Canada Part 3-Dicotyledoneae (Saururaceae to Violaceae). National Museum of Natural Sciences, Ottawa. 569 pp. Scoggan, H. J. (1979). Flora of Canada Part 4-Dicotyledoneae (Loasaceae to Compositae). National Museum of Natural Sciences, Ottawa. 594 pp. USDA, NRCS. (2006). The PLANTS Database. National Plant Data Center, Baton Rouge, LA. Viewed 13 December 2006. Vincent, M. A. and Lammers, T. G. (2005). Distributional notes for the flora of Wisconsin. The Michigan Botanist 44: 1-7. Voss, E. G. (1985). Michigan Flora Part II, Dicots (Saururaceae-Cornaceae). Cranbrook Institute of Science Bulletin 59 and University of Michigan Herbarium. xix + 724 pp. Voss, E. G. (1996). Michigan Flora Part III, Dicots (Pyrolaceae-Compositae). Cranbrook Institute of Science Bulletin 61 and University of Michigan Herbarium. xix + 622 pp. Webb, D. A., Akeroyd, J. R. and 't Hart, H. (1993). Sedum L. Pp. 429-436, In Flora Europaea, volume 1-Psilotaceae to Platanaceae, second edition. (T. G. Tutin, N. A. Burges, A. O. Chater, J. R. Edmonson, V. H. Heywood, D. M. Moore, D. H. Valentine, S. M. Walters, and D. A. Webb, editors). Cambridge University Press, Cambridge. Whittall, J. B., Carlson, M. L., Beardsley, P. M., Meinke, R. J. and Liston, A. (2006). The Mimulus moschatus alliance (Phrymaceae): molecular and morphological phylogenetics and their conservation implications. Systematic Botany 31: 380-397. Wisflora: Wisconsin Vascular Plants. (2006). Viewed 13 December 2006. - David J. Schimpf, Deborah L. Pomroy Olga Lakela Herbarium, Department of Biology, University of Minnesota, Duluth, MN 55812-3004, Steven C. Garske Great Lakes Indian Fish and Wildlife Commission, Odanah, Wisconsin 54861 Doreen L. Hansen Library, University of Minnesota, Duluth, MN 55812-3001