WOOTON AND STANDLEY FLORA OF NEW MEXICO. 377 



New Mexico: Mangas Springs; Condes Camp; Florida Mountains. Dry hills, in 

 the Upper Sonoran Zone. 

 The type of G. tephrodes came from Condes Camp {Wright 956). 



30. PHASEOLUS L. Bean. 



Prostrate or twining annual or perennial herbs with pinnately 3-foliolate leaves, 

 the flowers in axillary, mostly long-peduncled raceriies; calyx 5-toothed; standard 

 recurved or spreading, the keel strongly incurved or coiled; pods 2-valve<l, straight 

 or falcate, with usually many seeds. 



Some of the species are of considerable value as forage plants and one of them, 

 introduced into cultivation, promises well for this piurpose. 



KEY TO THE SPECIES. 



Annuals. 



Leaflets triangular-lanceolate or ovate, not much longer than 



the peduncles 1. P. acutifolius. 



Leaflets elongated-linear or linear-oblong, about twice as 



long as the pedimcles 2. P. tcnuifolius. 



Perennials. 



Plants erect, 15 cm. high or less; peduncles 1 or 2-flowered. . 3. P. parvulus. 

 Plants twining, stems much more than 15 cm. long; pedun- 

 cles several-flowered. 



Stems and leaves pilose 4. P. macropoides. 



Stems and leaves glabrous or puberulent, never pilose. 

 Pods 12 mm. wide or more; bracts large, persistent; 



leaflets rhombic-ovate 5. P. metcaljei. 



Pods less than 9 mm. wide; bracts small, deciduous; 

 leaflets linear to rhombic. 

 Leaflets elongated- linear, entire; style slender, 



2 mm. long 6. P. angustissimus. 



Leaflets broader than linear, lobed; style slen- 

 der or stout. 

 Leaflets deeply 3-lobed; pods densely pu- 

 bescent, with a short stout style 7. P. grayanus. 



Leaflets with small lobes near the base; 

 pods nearly glabrous, with a long 

 slender style 8. P. dilatatus. 



1. Phaseolus acutifolius A. Gray, PI. Wright. 1: 43. 1852. 



Type locality: Mountain valley, thirty miles east of El Paso, Texas. 

 Range: Western Texas to southern Arizona. 



New Mexico: Salt Lake; Organ Mountains; Zuni. Dry hills, in the Upper Sono- 

 ran Zone. 



2. Phaseolus tenuifoUus (A. Gray) Woot. & Standi. Contr. U. S. Nat. Herb. 16: 



140. 1913. 

 Phaseolus acutifolius tenuifoUus A. Gray, PI. Wright. 2: 33. 1853. 

 Type locality: Mountain sides near the Copper Mines, New Mexico. Type col- 

 lected by Wright (no. 950). 

 Range: Mountains of southwestern New Mexico. 

 New Mexico: Mangas Springs; Santa Rita. 



3. Phaseolus parvulus Greene, Bot. Gaz. 6: 217. 1881. 



Type locality: "Abundant in deep woods of Pinus ponderosa, in the Pinos Altos 

 Mountains," N6w Mexico. Type collected by E. L. Greene in 1880 or 1881. 

 Range: Southwestern New Mexico and southern Arizona. 

 We have seen no specimens of this from New Mexico. 



