654 UMBELLIFERAE 



4. C. purpurascens Jones. Plants 2 to 5 inclies IiikIu the leaves and peduncles 

 basal or sub-basal; herba^'e prlabrous; peduncles equalinp: or shorter than the 

 leaves ; leaves irray-pallid, the blades ternate, then bipinnatifid, % to 2 inches long; 

 ultimate segments ovate in outline. 4 to G lines long, pinnately crenate or incised; 

 umbels capitate or more or less compacted; involucres consi)icuous, white, their 

 broad bracts united below and with 3 or 4 prominent green or purplish nerves; 

 involueels resembling the involucres but smaller; flowers purple; fruit orbicular, 

 4 to G lines long, its body oblong ; carpels flattened with 5 broad thin wings (corky- 

 thickened next the body of the carpel) ; oil-tubes 2 or 3 (or 4) in the intervals, 

 4 to 7 on the commissure. 



Rocky hills, 4800 to 9000 feet : eastern IMohave Desert. East to Utah and New 

 Mexico. ]\lar.-Apr., fr. ]May-June. 



Locs. — Barnwell, New York Mts., K. A. Longeneclcer. Nev.: Candelaria, Mineral Co., 

 Shockley 208; Pioche, Lincoln Co., Maud Minihorn; Mt. Gabb, Palmetto Range, Purpus 5866. 



Kefs. — Cymopterus pukpurascens Jones, Zoe 4:277 (1893). C. montanus T. & G. var. 

 purpurascens Gray, Bot. Ives 15 (1860), type loc. Oraibi, Navajo Co., Ariz., Newherry. C. 

 iitahensi-s Jones, Proc. Cal. Acad, ser, 2, 5:684 (1895), type loc. Pagumpa, Ariz., Jones 5098; 

 Jepson, Man. 730 (1925). Phellopterus purpurascens C. & R. Contrib. U. S. Nat. Herb. 7:168 

 (1900). 



5. C. deserticola Bdg. Plants 4 to 6 inches high, the leaves all basal and the 



scape-like peduncles arising from the root-crovni ; peduncles ascending, a little 

 exceeding the leaves ; leaves glabrous, the blades triangular in outline, 2 inches 

 long, bi- or tri-ternate, then pinnately parted, ll^ to 2^/4 inches long ; segments with 

 acute bristle-tipped lobes; petioles 2i/^ to Sy2 inches long; involucre with short 

 linear bracts ; flowers dark purple, crowded in a globose head 1/2 to % inches in 

 diameter ; fruits 2 lines long, sessile ; lateral wings thick, corky, narrow, pubescent, 

 with the margins shredded; oil-tubes minute and numerous, forming in cross- 

 section a continuous chain. 



Sandy plains, 2600 to 3100 feet : central Mohave Desert. Apr., fr. June. 



Geog. note. — Cymopterus deserticola is an endemic of the Mohave Desert which thus far 

 has been collected perhaps only four times and is known only from Kramer and from the neighbor- 

 hood of Victorville. 



Refs. — CYMOPTERtJS DESERTICOLA Bdg. Univ. Cal. Publ. Bot. 6:168 (1915), type loc. Kramer, 

 Mohave Desert, K. Brandegee; Jepson, Man, 731 (1925) ; Mathias, Ann. Mo. Bot. Gard. 17:379 

 (1930). 



6. C. abori^num Jones. Plants 4 to 11 inches high, the leaves all basal and 

 the scape-like peduncles arising from the root-crown ; petioles and peduncles gla- 

 brous or nearly so ; leaf-blades ashy-gray, scaberulous, bi- or tri-pinnate, the secon- 

 dary pinnae pinnately divided into linear segments % to l^/^ lines long; umbels 

 small, the rays 1 to 6 lines long, or the umbels when young subcapitate ; flowers 

 white ; fruits 3 to 4 lines long ; wings plane, about the same width, V2 to 1% lines 

 wide ; oil-tubes "2 to 8 in the intervals, 6 to 22 on the commissure". 



Rock crevices, 5000 to 9000 feet : desert ranges of Mono and Inyo Cos. East to 

 southern Nevada. Apr., fr. May-June. 



Locs. — Mono Lake (Ann. Mo. Bot. Gard. 17:353) ; Silver Canon near Laws, K. Brandegee; 

 Bishop, Inyo Co., Jones; Pleasant Canon, Panamint Range, Jones. 



Refs. — Cymopterus aboriginitm Jones, Contrib. W. Bot. 12:22, 27 (1908), type loc. Indian 

 Spr., Charleston Mts., s. Nev., Jones. Vars. ovalis, subternatus and oblongus Jones, I.e., type loc. 

 Bishop, Inyo Co., Jones. Aulospermum aboriginum Mathias, Ann. Mo. Bot. Gard. 17:353 (1930). 



7. C. cinerarius Gray. Plants 2 inches high, the peduncles and leaves from 

 a short more or less horizontal subterranean root-crown; blades of the leaves (in 

 outline) somewhat cordate, bipinnate, with pinnately divided segments, glaucous 

 and cinereous with a very minute harsh pubescence ; rays few, short or almost none ; 

 involueels of numerous united somewhat membranous long-acuminate segments ; 



