VOL. II.] 



CARROT FAMILY. 



Hairy 



517 



4. Peucedanum villosum Nutt. 

 Parsley. (Fig. 2648.) 



Peucedanum villosum Nutt; S. Wats. Bot. King's Exp. 



131. 1871. 



Tomentose-pubescent; peduncles 3'-8' long, ex- 

 ceeding the leaves. Roots long and deep; leaves 

 very finely dissected into narrowly oblong obtuse 

 lobes and segments, the primary divisions mostly 

 ternate; umbel 4-io-rayed, the rays 4 // -io // long in 

 fruit; bracts of the involucels lanceolate, tomentose, 

 or finely pubescent, separate or nearly so ; flowers 

 yellow; fruit oval, finely pubescent, 3 // -3> // long, 

 about 2%" broad, the lateral wings narrower than the 

 carpel, the dorsal and intermediate ribs prominent; 

 oil-tubes 3-4 in the intervals. 



Prairies and dry soil, Nebraska to the Northwest Ter- 

 ritory, west to New Mexico and California. April-May. 



ii. CYMOPTERUS Raf. Journ. Phys. 89: 100. 1819. 



Perennial subscapose glabrous herbs, from thick roots, with pinnately decompound leaves, 

 and white flowers (in our species) in peduncled umbels. Involucre of several bracts or none. 

 Involucels of i to numerous bracts. Calyx-teeth rather prominent. Petals inflexed at the 

 apex. Stylopodium depressed or wanting. Fruit globose, ovoid or ellipsoid, flattened 

 laterally or not at all. Carpels dorsally flattened, with 3-5 flat equal wings; oil-tubes 

 several or solitary in the intervals. [Greek, wave-winged, referring to the fruit.] 



About 13 species, natives of western and central North America. 



Involucre none. I. C. acaulis. 



Involucre prominent. 2. C. montanus. 



i. Cymopterus acaulis (Pursh) Rydberg. Plains Cymopterus. (Fig. 2649.) 



Selinum acaule Pursh, Fl. Am. Sept. 732. 1814. 

 Cvmoplerus glomeratus Raf. Journ. Phys. 89: loo. i8iq. 

 Cymopterus acaulis Rydberg, Bot. Surv. Neb. 3: 38. 

 1894. 



Low, the stem seldom over i / high. Leaves erect 

 or ascending, bright green, 3'-8' long, slender- 

 pctioled, pinnate or bipinnate into linear-oblong 

 obtuse entire or lobed segments; umbels sleuder- 

 peduncled, capitate, i' or less broad, several rayed; 

 rays i // -2^ // long; pedicels very short; involucre 

 none; involucel of a single palmately-lobed bractlet; 

 fruit broadly oval, about 3" in diameter when 

 mature; oil tubes 4-5 in the intervals; seed face 

 nearly flat. 



In dry soil, Minnesota and Wisconsin to Arkansas, 

 west to the Northwest Territory, British Columbia and 

 Colorado. April-May. 



2. Cymopterus montanus T. & G. Moun- 

 tain Cymopterus. (Fig. 2650.) 



Cymopterus montanus T. & G. Fl. N. A. x: 624. 1840. 



Similar to the preceding species but somewhat 

 glaucous, or very slightly pubescent. Leaves i'-6' 

 high, stout-petioled, pinnate, or bipinnate, the seg- 

 ments oblong, obtuse, entire, toothed, or lobed; pe- 

 duncles stout, i'-6' high; involucre and involucels 

 of broad membraneous somewhat united veined 

 bracts; umbels i / -2 / broad in fruit; rays several, 

 3"-9" long; pedicels i"-2" long; fruit ellipsoid, 

 3 // -6 // long, the carpels broadly 3-5 winged; oil- 

 tubes 1-3 in the intervals. 



Dry soil, western Nebraska and Wyoming to Texas. 

 March-April. 



