The boletes of Michigan, by Alexander H. Smith and Harry D. Thiers.

30

THE BOLETES OF MICHIGAN

Material examined. *-Barry: Smith 51217. Cheboygan: Shaffer
1584; Smith 25924, 37630, 62976. Chippewa: Mains 32-521. Emmet:
Kauffman 7-3-05; 7-31-05; Mains 32-750; Thiers 4255. Gratiot: Potter
3479, 3971, 5341, 6074, 8413, 8478, 9850, 10456, 11075, 12325,
12373, 13992. Houghton: Pennington. Jackson: Mazzer 4298; Smith
62843. Livingston: Smith 6808. Luce: Smith 39289, 39501, 42286;
Thiers 3850, 4033. Mackinac: Smith 44109, 4411. Marquette: Bartelli
283; Kauffman 8-27-06. Ogemaw: Smith 67420. Ontonagon: Shaffer
3785. Schoolcraft: Smith 63056. Washtenaw: Shaffer 2586, 2621, 2637,
2771; Smith 6718, 18573, 62899, 64129, 72554; Thiers 4554, 4576,
4585; Wehmeyer 7-16-21; Zehner 85.
2. Gyroporus castaneus (Fries) Quelet
Enchir. Fung. p. 161. 1886
Boletus castaneus Fries, Syst. Myc. 1:392. 1821.
Boletus cyanescens fulvidus Fries, Syst. Myc. 1:395. 1821.
Boletus fulvidus Fries, Epicr. Syst. Myc. p. 426. 1838.
Boletus testaceus Persoon, Mycol. Eur. 2:137. 1825.
Suillus castaneus (Fries) Karsten, Bidr. Finl. Nat. Folk, 37:1. 1882.
Gyroporus castaneus var. fulvidus (Fries) Quelet, Enchir. Fung. p. 161. 1886.
Boletus rufocastaneus Ellis & Everhart, N. Amer. Fungi 2d Ser. no. 2302. 1890.
Coelopus castaneus (Fries) Bat., Bolets p. 12. 1908.
Illus. Figs. 21, 23; Pls. 2-4.
Pileus 3-7 (10) cm broad, obtuse to broadly convex, expanding to
broadly convex to plane or shallowly depressed, the margin often split,
margin entire and straight at first but often flaring at maturity; surface
dry and unpolished to pruinose to almost pulverulent, sometimes appearing glabrous near the margin, sometimes appearing granulose-reticulate
when old; color variable, chestnut-brown to biscuit color or tawnyorange to orange or reddish or cinnamon to bright yellow-brown
("cinnamon-brown" to "ochraceous-buff' or "ochraceous-orange" or
"orange-rufous" to "Sanford's brown" to "Mars-yellow" to "pinkish
cinnamon"), to fulvous to cinnamon or lateritious. Context up to 1 cm
thick, white, unchanging when bruised or exposed, fragile, taste slightly
acid to not distinctive, odor not distinctive, KOH-brownish, FeSO4 -brownish.
Tubes shallow (5-8 mm long), free or deeply depressed around the
stipe, rarely adnate to subdecurrent, white when young, becoming
yellowish ("cream color") or brighter yellow ("Naples-yellow" to

*The collections are arranged by counties and the latter alphabetically.