1917] Butters & St. John,— North American Lathyrus 161 
of Britton, Mem. Torr. Bot. Club. v. 207 (1894), not of Pursh or 
Hooker — humilis, ramosus saepe decumbens pilosus vel saepius basim 
versus glabratus, 1.5-3.5 dm. altus; caule 1-3 mm. crasso striato 
4-angulato haud alato; stipulis lineari-lanceolatis attenuatis semi- 
sagittatis 5-22 mm. longis, 1+ mm. latis, nervosis; foliolis 4-12 
subalternis elliptico-lanceolatis mucronatis 1.5-6 cm. longis, 3-13 mm. 
latis, nervosis; cirrhis simplicibus vel 2-3-fidis; ramis cum pedunculis 
1-3 folia superantibus 2-5-floriferis instructis; floribus magnis pulchris 
purpureis 1.8-3 cm. longis; calyce campanulato oblique 5-dentato, 
dentibus superioribus brevibus adscendentibus, inferioribus atten- 
uatis patentibus. 
Plant low and branching, often decumbent, pilose, or more fre- 
quently glabrate towards the base, 1.5-3.5 dm. tall: stem striate and 
4-angled, not at all winged, 1-3 mm. in thickness: stipules linear- 
lanceolate, attenuate semisagittate, 5-22 mm. in length, 1-4 mm. in 
breadth, with prominent raised nerves; leaflets 4-12 in number, 
sub-alternate, elliptic-lanceolate and mucronate, the longitudinal 
nerves raised and prominent, leaflets 1.5-6 cm. long, 3-13 mm. wide; 
tendrils unbranched, or 2-3-parted: branches of the stem bearing 
1-3 peduncles, which are 2-5-flowered, and exceed the leaves: flowers 
beautiful, large and purple, 1.8-3 cm. long; calyx campanulate 
obliquely 5-toothed, the upper teeth short and ascending, the lower 
elongate and divergent. 
Specimens examined: Cotorapo: Rocky Mountains, 1862, Æ. 
Hall & J. P. Harbour, no. 111; low lands by streams on the plains, 
Golden City ete., May 25, 1870, E. L. Greene, no. 94; Gunnison, 
altitude 7680 ft., July 7, 1901, C. F. Baker, no. 355; Sapinero, altitude 
7250 ft., June 19, 1901, C. F. Baker, no. 181; clay hillside, altitude 
5400 ft. Naturita, May 16, 1914, Edwin Payson, no. 312; Gato, 
June 18, 1899, C. F. Baker, no. 432; roadsides below Mancos, July 8, 
1898, C. F. Baker, F. S. Earle and S. M. Tracy, no. 413; collected on 
Long’s Ist expedition, Dr. James. New Mexico: altitude 7044 ft., 
Santa Fe, June, 1874, J. T. Rothrock, no. 3; altitude 7200 ft., Santa 
Fe, May 4, 1897, A. A. & E. Gertrude Heller, no. 3658 (TYPE in 
Gray Herb.); 1847, A. Fendler, no. 115; Gray, altitude 6000 ft., June 
13, 1898, Josephine Skehan, no. 24; Fort Wingate, 1882, W. Matthews, 
no. 18. ARIZONA: Little Colorado, Dr. Newberry; 1880, Mr. & Mrs. 
J. G. Lemmon. 
Of the various names mentioned above, which have been tossed 
about from one species to another, there is but one left to dispose of, 
Vicia stipulacea of Pursh.! This species was described in considerable 
detail by Pursh, in the supplement to his Flora. The type was col- 
lected by Bradbury, presumably along the Missouri River, somewhere 
1 Pursh, F., Fl. Am. Sept. ii. 739 (1814). The original spelling is Vicia stipulacca, an obvious 
misprint, which has been uniformly quoted as V. stipulacea. | Unfortunately the name occurs 
but once, in Pursh’s Flora, as the supplement is not indexed. The so-called second edition of 
the Flora is merely an identical reprint. 
