50 SYNOPSIS OF THE FLORA OF COLORADO. 



SIUM ANGUSTIFOLIUM, L. Near Canon City, Brandegee. Denver, 

 Porter. 



OSMORRHIZA NUDA, Torr. P. R. R., 4, p. 93. Petioles and lower part 

 of the stems strigosely pubescent ; leaflets broadly ovate, often deeply 

 3-lobed, coarsely dentate-serrate; peduncles elongated; involucre and 

 involucels none, or occasionally present though small ; umbel 4-rayed, 

 rays 4-6 flowered ; styles very short, fruit obtuse, shorter than the pedi- 

 cels. Too near 0. brevistyla of the Eastern States. Hall & Harbour. 

 Sierra Mojado, Brandegee. 



CYMOPTERUS 1 GrLOMERATUS, DC. Eoot thick and|fusiform ; plant 3'-$' 

 high ; caudex about I/high, sometimes divided, bearing the leaves and pe- 

 duncles at the summit ; leaves on long petioles, ternately-divided and bi- 

 pinnatifid, segments oblong-linear; rays of the umbel 4-6, very short; pe- 

 duncles much shorter than leaves, 6 // -12 // long; flowers white, those of 

 the center abortive, pedicellate; leaflets of the palmately 5-7 parted in- 

 volucel coherent at base and partly adnate to the rays of the mnbellets ; 

 calyx-teeth subulate; fruit elliptical, 4" long, wings thickened and some- 

 what spongy, more or less obsolete; vitta3 in each interval 3-4, in the 

 commissure about 8. Hall & Harbour, 210. Canon City, Brandegee. 

 Clear Creek Canon, Coulter. 



CYMOPTERUS MONTANUS, Nutt. Eoot long and fleshy; stem 2 / -6 / 

 high; caudex 6"-18" long, erect, sheathed at base; leaves glaucous, 

 ovate in outline, bipinnately divided, segments rather few and distant, 

 about 3-4 pairs, oblong-linear, rather obtuse ; peduncles shorter or 

 longer than the leaves; involucre and involucel somewhat campanu- 

 late, scarious, about 5-parted, segments oblong, obtuse, entire or 5-cleft, 

 with greenish ribs; flowers white, polygamous; calyx-teeth minute, 

 ovate ; fruit about 3" long, the integuments thick and opaque so as to 

 conceal the vitta3, commissure with 4 vitta3; carpophore persistent, 

 2-parted; wings 6-10, broad and membranous, often unequal; seed more 

 or less involute. .HiaM & Harbour, 211. Canon City, Brandegee. Plains 

 near Denver, Coulter. 



CYMOPTERUS ALPINUS, Gr. Sill. Jour., (N~. &,) 32, p. 408. Caudex 

 c3spitose; leaves pinnatlsect, pinnae, 3-5, approximate, 3-7 parted, 

 segments linear-lanceolate, acutish or mucronate, very entire, or the 

 lower 2-3 cleft; scape 2 / -4 / high, bearing a subcapitate umbel, a little 

 longer than the leaves; iuvolucels somewhat one-sided, 5-7 parted, seg- 

 ments linear or lanceolate, green, equaling the golden flowers; teeth of 

 the calyx lanceolate, subulate, persistent; wings of the fruit equal, some- 

 what erose, scarcely undulate; vittse 1-2 in the intervals, 4 in the com- 

 missure; carpophore none; fruit 2 // -3 // long. High alpine. Hall & Har- 

 bour, 213; Parry, 158; Canby. Summit of Pike's Peak, Porter. Mount 

 Lincoln at 13,000 feet altitude, Coulter. 



CYMOPTERUS? ANISATUS, Gr. Proc. Ac. Phil, March,I863, p. 33. Acau- 

 lescent, csespitose from the much-branched caudex, glabrous ; leaves 



CYMOPTERUS, Raf. Calyx-teeth rather prominent and setaceous or lanceolate, mi- 

 nute or obsolete. Petals ovate, oblong or oblanceolate, inflexed, quasi-einarginate. 

 Disk flattened around the styles, undulate-margined. Fruit ovate or elliptical, obtuse 

 or retiise, subterete or slightly compressed dorsally; carpels semi-terete; ribs thick 

 and elevated, all or only the lateral ones or those opposite to the calyx-teeth ex- 

 panded into wings ; vittse numerous, narrow. Carpophore 2-parted, free or attached 

 to the carpels. Seeds much compressed dorsally and more or less concave on the face. 

 Perennial and subeyespitose, with a thickened caudex ; leaves pinnately decompound, 

 with narrow, small or incisely pinnatitid segments ; umbels compound, usually few- 

 rayed ; involucral bracts 1-2 or none ; of the iuvolucels several, very narrow or broad 

 and membranous; flowers white or yellow. Eenth. $ Hook. 



