52 



SYNOPSIS OF THE FLORA OF COLORADO. 



larger ones incised ; petioles with a long dilated, spathaeeous base; in- 

 volucre none; involucel of about 9 setaceous, unequal leaflets, equaling 

 the pedicels; flowers bright-yellow; fruit l"-2" long, oblong-oval or 

 nearly orbicular, marginal wings broad ; the strong vitta3 single or double. 

 Foliage variable. Hall & Harbour, 217; Porter; Hoopes. Sierra Madre 

 Range, at 11,500 feet altitude, and Twin Lakes, Coulter. 



THASPIUM TRIFOLIATUM, Gr. Near Gallon City and Wet Mountain 

 Valley, Brandegee. 



THASPIUM TRACHYPLEURUM, Gr. Proc. Acad. PML March, 1863, p. 

 63. Glabrous; stem 1 or more high, striate, 1-3 leaved, bearing 2-3 

 umbels on long peduncles; leaves ternately decompound, segments fili- 

 form, rnucronulate; petioles dilated at base, not scarious-margined ; in- 

 volucre and involucel of 1-3 small, subulate leaflets; flowers yellow; 

 fruit twin-ovate, laterally compressed, transverse section of the meri- 

 carps almost orbicular ; ridges or wings 5, similar, thick, suberose, very 

 obtuse, scabrous, one strong vitta in each of the intervals. Hall & 

 Harbour, 215; Median. South Park, Porter. Saint Vrain Canon, Bear 

 Greek and Boulder Canon, Coulter. Grand Caiiou of the Arkansas, 

 Brandegee. 



SESELi 1 HAILLII, Gr. Proc. Am. Ac., June, 1870, v. 8, p. 288. Acauies- 

 cent from a stout caudex branching at the summit; lea vespinnati sect, 3-5 

 pairs, segments cuneate or oblong, incised or pinuatind, lobes 3-7, 

 short, mucronate, sometimes sparingly toothed; scape very simple, 

 naked, surpassing the leaves, slender, 10' high ; rays of the umbel 4-8, 

 short, elongated after flowering; iuvolucel deeply parted, divisions ovate, 

 3-cleft at the summit, longer than the yellow flowers; fruit narrowly ob- 

 long, very smooth, much longer than the very short pedicel; teeth of the 

 calyx short, not persistent; vitta3 in the intervals large, often with very 

 small accessory ones in each rib ; section of the seed transverse, sub- 

 quadrate. Hall & Harbour, 221. Bear Creek, 17 miles west of Denver, 

 Vasey. Near Denver, Coulter. 



ARCHANGELICA GMELINI, DC. Near Denver, Dr. Smith. Cafion 

 City, Brandegee. Weston's Pass and Mount Lincoln, at 12,500 feet alti- 

 tude, Coulter. Hall & Harbour, 219. 



ARCHEMORA FENDLERI, Gr., PI. Fendl, p. 56. Boot fasciculate-tuber- 

 ose; tubers 3-4, oblong, about V ; stem simple, slender, l-2 high; 

 leaves pinnate 5-7 foliolate, leaflets f'-lj' long, those of the radical and 

 lower cauline ones ovate or oblong, all incisely serrate throughout; 

 petioles spathaeeous at base; involucels none; umbels small; fruit 

 small, hardly 2" in length ; oval, the wing-like margins narrower than the 

 disk; vittae of the commissure 4, of which 2 are shorter; flowers white. 

 Hall & Harbour, 220. " In subalpine woods," near Cafion City, Bran- 

 degee. Mount Lincoln, at 12,500 feet altitude, Coulter. 



PEUCEDANUM (?) NUDICAULE, Nutt. (?) Caulescent or sometimes 

 scarcely so, minutely prninose-pubesceut, 3'-15' high; leafy only at 

 base; leaves bipinnateor ternate-bipinnate, the segments incisely lobed 

 with usually rather broad and subacute divisions; umbel somewhat 

 ^capitate in flower, with 8-12 rays; involucre none; involucels unilateral, 



1 SESELI, L. Margin of the calyx 5-toothed, teeth short, somewhat thick'ened. Petals 

 obovate, coarctate in an inflexed point, emarginate or subentire. Fruit oval or oblong, 

 eubterete in the transverse section, crowned by the reflexed styles. Ribs of the meri 

 carp 5, slightly prominent or elevated, thickened and corky ; lateral ones marginal and 

 often a little broader. Intervals with a single vittae, rarely 2-3 vitta}. Carpophore 

 2-cleft. Albumen sub-serniterete. Koch, FL Germ. 



