Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean: Vol. 4, Pt. 3

No. 4.
DESCRIPTION OF THE GENERAL BOTANICAL COLLECTIONS.
BY JOHN TORREY.
RANUNCULACEE.
CLEMATIS LIGUSTICIFOLIA, Nutt. in Torr. & Gray, Fl. 1, p. 9. Near San Antonita, New Mexico;
October. In fruit.
CLEMATIS BIGELOVII, (sp. nov.): humilis? herbacea? glabella; foliis pinnatis vel subbipinnatis; foliolis 7-9 trilobis tripartitisve longiuscule petiolulatis, lobis subovatis integerrimis nunc
incisis; pedunculis solitariis unifloris; calyce subcampanulato, sepalis anguste oblongis baud
crassis apice obtuso patentibus; caudis carpellorum dense plumosus. On the Sandia mountains,
New Mexico; October. Of this apparently new Clematis there is only a single flowering specimen
and a few mature carpels in the collection. The stem appears to be low and nearly herbaceous,
but it probably elongates and climbs by the petioles. The leaflets are only from half an inch
to an inch in length, membranaceous and inconspicuously veined; those of the lower pinn more
divided. Peduncle an inch or two in length, nodding in flower. Sepals scarcely over half an
inch in length, pale, membranaceous in the dried state, probably a little thickened in the living
plant, but not leathery as in C. Viorna, C. Pitcheri, etc., almost glabrous, except the densely
tomentose margin, not appendaged, but the obtuse tip spreading. Carpels silky pubescent,
becoming glabrate; the tails over an inch long, plumose as in C. Viorna. The flowers are
smaller than in any other North American species of this division.
CLEMATIS LASIANTHA. Nutt. in Torr. & Gray, Fl. 1, p. 9. Hill sides, Napa valley, April 27.
Only the male'plant of this showy species was collected by Dr. Bigelow. The female was not
known when the Flora of North America was published; but it has since been found by Colonel
Fremont. The carpels have tails of about an inch and a half in length.
T.HALICTRUM FENDLERI, Engelm. in Gray, PI,. Fendl. p. 5; var.? POLYcARPUM: glaberrimum;
carpellis numerosioribus eglandulosis. Mountain ravines, New Mexico. In fruit October, &c.
Sides of rivulets, Napa valley, California, April 25, (with immature fruit). It occurs in Coulter's
California collection, in flower only. Leaves mostly petiolate, ternately decompound: leaflets
obovate and cuneate, incisely 3-lobed; the lobes cut or entire. Panicle contracted, few-flowered.
Sepals ovate, rather acute. Carpels 15-25, ovate, compressed, with two prominent ribson each
side. Stigma linear, elongated. T. Fendleri has a more compound and spreading panicle than
our plant, and the carpels are more or less glandular.
THALICTRUM DIOICUM, Linn.; Torr. d& Gray, Fl. 1, p. 38. Mountains near San Gabriel;
3Iarch 23. Only the male flowers are in the collection; and it is possible the plant may be
distinct from T. dioicum. That species occurs in Oregon.
ANEMONE NEMOROSA, Linn.; var. caule gracili elongato; foliis utrinque pubescentibus. San