SYNOPSIS OF THE FLORA OF COLORADO. 51 



4'-6' long, erect, narrow, on long petioles, somewhat rigid, pinnate, the 

 leaflets 6-10 pairs, piunately parted, segments entire or laciniately 

 lobed, linear, pungently acute; scapes equaling or exceeding the leaves, 

 6 / -12 / high; rays 6-12, unequal; involucre usually none; involucels of 

 6-8 linear, subulate leaflets, equaling the white flowers; calyx-teeth con- 

 spicuous, linear-subulate, foliaceous; fruit 2" long, irregularly winged, 

 the lateral ribs and the dorsal one usually broader, rather thick, and not 

 membranous ; vittse obscure, 1 in each narrow interval, 2-4 in the com- 

 missure ; seeds slightly concave, somewhat crenately sulcate under the 

 dorsal intervals. In the mountains. Sail & Harbour, 222; Canby. 



MuSENiUM 1 TRACHYSPERMUM, ISTutt. Decumbent ; leaves bipinnati- 

 fid, segments pinnatifid, rather obtuse, lobes often 2-3 cleft and very 

 short, rachis wide; involucel about 8 leaved, short; fruit short, oval, 

 pulverulently-scabrous. Near M. divaricatum, Xutt, but smaller. Fruit 

 only half as large, nearly as broad as long. Hall & Harbour, 214. 



MUSENIUM GREENII, Gr. Proc. Am. Acad., Feb., 1872, v. 8, p. 387. Stem- 

 less ; leaves all from a caudex squamose at the summit, almost simply 

 pinnate, narrow ; leaflets 7-9, on a rachis margined only above, sessile y 

 subovate in outline, piunately 5-7 lobed and few-toothed, teeth and lobes 

 sharp ; scapes more than a span high, wholly naked; umbels short- 

 rayed; involucels of 3 or 4 subulate bracts, nearly equaling the subsessile, 

 yellow flowers ; fruit 2" long, oblong, very obtuse, truncate, smooth,, 

 crowned with the ovate, subulate calyx-teeth ; ribs rather prominent, 

 very narrow; vittse between, 1-2, large; beneath, solitary, small. Mount- 

 ains above Golden City, Greene. 



LiauSTiouM APIIFOLIUM, Benth. & Hook., Proc. Am. Acad., 7, p. 347. 

 ( Cynopium, Nutt.J Stems 2-4 high, terete, leafy or naked, branching 

 towards the summit, with 2-4 umbels on long peduncles; leaves piu- 

 nately decompound, the segments incisely lobed, acute; cauline leaves 

 teruate, upon a short dilated sheath; involucre none; involucel few- 

 leaved, lateral; calyx-teeth obsolete; the stylopodia rather prominent, 

 with a somewhat \lilated crenate margin ; fruit 2J" long, oval, with 

 acutely carinate ribs; seeds concave on the face, with a central longitudi- 

 nal ridge. Platte River and in the Sierra Madre Eange, Coulter. Wet 

 Mountain Valley, Brandegee. Hall & Harbour, 218. 



LIGUSTICUM SCOPULORUM, Gr. Proc. Am. Acad., 1, p. 347. Rather stout,. 

 2-4 high ; leaves pinnately decompound, segments ovate, deeply incised,, 

 teeth very acute; fruit elliptical-oblong, 4" long; wings narrow, thick- 

 ened, intermediate and dorsal 1-2, often obsolete; vittse marked, rather 

 large, in all the intervals 3, in the lateral ones sometimes 4; section of 

 the seed almost reniform. Alpine and subalpiue. Hall & Harbour, 216.. 

 Gailon City, Brandegee. Xear Denver, Canby. 



LIGUSTICUM MONTANUM, Gr. ( Tliaspium montanum, Gr. PI. Fendl, p.. 

 57,) Proc. Am. Acad., 7, p. 347. Very smooth; stem erect, slender, from a 

 thick fusiform root, l-2 high; leaves twice ternately divided; leafletscu- 

 neiform, trifid, lobes oblong or lanceolate, sometimes linear, entire, or the 



'MUSENIUM, Nutt. Margin of the calyx 5-toothed ; the teeth persistent. Petals 

 obovate; the point inflexed. Styles slender, reflexed, rather long. Fruit ovate or 

 ovate-oblong, laterally compressed. Carpels more or less minutely scabrous, with 5 

 filiform, acute, slightly prominent ribs. Intervals with 2-3 vittas. Commissure with 

 4 vitt*. Carpophore 2-cleft. Seed with the sides moderately incurved. Perennial, 

 dwarf, rather foetid, resiuiferous (North American) herbs, with fusiform roots and a- 

 short caudex, or branching dichotomously from the base. Leaves 2-3 piuuatitid. In- 

 volucre none. Involucels unilateral, of a few rather rigid narrow leaflets. Flowers 

 yellow or white. T. $ G. Fl. N. Am. 



