F4 



tipped. Calyx conic, with tube about 3 mm. long and as long as the 

 triangular and curved teeth. Bracts often as long as calyx. Primary 

 leaves sometimes with 5 leaflets, the rest with three, early petioles 

 very short and later ones elongated. Pubescence attached near the 

 middle, fine and wavy. In the type the calyx is not deciduous. It 

 closely resembles A. Alberti Bunge. Frequent on the plains of northern 

 Colorado and adjacent Nebraska and "Wyoming. Middle Temperate life 

 zone, in dry places. Blooming in May. 



Astragalus sericoleucus var. aretioides Jones Cont. 8 13 (1898). 

 Orophaca Rydberg. This is a very condensed form with flowers barely 

 exserted from the stipules and with stems reduced to crowns, the 

 leaves very short and with almost no petiole. Leaflets usually acute. 

 On gravelly hills of the Laramie Plains, Wyoming. 



Astragalus sericoleucus var. tridactylicus (Gray) Jones Cont. 

 10 69 (1902). A. tridactylicus Gray Proc. Am. Acad. 6 527 (1865.) 

 Orophaca Rydberg. Tragacantha Kuntze. Phaca digitata Nutt. An 

 unpublished name. Pods globose-ovate, nearly smooth to puberulent, 

 3-4 seeded. Flowers mostly included in the stipules, from 1 cm. long 

 to half as long and very variable. Calyx soon falling from the pod. 

 Leaves usually long-petioled. Leaflets rather narrow and often 1.5 

 cm. long. Stems reduced to crowns. With the type but less com- 

 mon. The extreme form seem very distinct, but it intergrades. 



22. Astragalus tegetarioides Jones Cpnt. 10 66 (1902). Pods 

 about twice the calyx, about 3 mm high and 1-2 mm. wide, abruptly 

 apiculate at both ends, splitting the calyx, chartaceous, coarsely reti- 

 culated, translucent, laterally flattened but bulged at the single sped, 

 ashy, rather ascending, sutures obscure and nerve-like, sides rather 

 concave, cross section ovate, or when bisulcate dorsally appearing 4- 

 angled, both sutures convex but the ventral the more so. Flowers 

 about 5 mm long, horizontal. About half a dozen in a head which be- 

 comes a short raceme in fruit, 5 mm. long. Banner purple-striped, about 

 3 mm long, oval, abruptly erect at end of teeth, with sides much re- 

 flexed. Wings broadly obovate, very oblique, wider than keel and 



1 mm. longer, 1 mm. shorter than banner. Keel barely surpassin-:;; 

 the calyx, rounded from base to a half circle, obtuse, about 1 mm. higb. 

 Calyx turbinate-campanulate. the tube about 1 mm. long, narrowed a'-'d 

 unequally inserted at base on a filiform pedicel which is at lo'-^t 

 as long as calyx tube, not obl'que fibove. Teeth subulate, lax. nenrly 



2 mm. long. Bracts lanceolate, shorter than the pedicels. Pedum^leg 

 filiform, about 2 cm. long. Leaves 2.5-4 cm long, with the filifnr m 

 1 etiole over half the whole. Leaflets thick, folded, nearly conti2;no!is, 

 about 4 pairs, 4-5 mm. long, obcordate to oval-obcordate. with cuneate 

 and lons'-petiolulate base, truncate, to notched. Stipules nearly deltoid, 

 with subulate tips, green at first, 3-5 mm. long. Stems much branched 

 forming dense mats, about 1 mm. thick, flexuous, with internodes about 

 1 cm. long. "Whole iilant silverv with wavy hairs. On the southf^rn 

 Blue Mts. Oregon in the Ruck Range, in sandy soil, No. 2619 Cusick. 

 blooming in June. This has the habit ff te^'etarius and lentiformis. 

 But for the 1 celled pod it would go with lentiformis. 



23. Astraq^ius quinqueflorus Watson Proc. Am. Acad. ?1 450 

 (1886). Pods about 4 mm, high and 2-3 mm wide, ashy, half-oval, very 

 obtuse and ai;iculatp coarsely 5-7 ribbod. with thick sutures, rarely 

 a little sulcate dorsally in the middle, laterally flattened, with cross sec 

 tion ovate or a little cordate, pendent, splitting the calyx, several seeded 

 Flowers white, about 3 mm. long, rarely 5 in a loose raceme. Banner 

 round, abruptly arched to erect at end of tube, about 2 mm. long, sides 

 a little reflexed. Wings oblanceolate, arched, about 1 mm longer than 

 keel and as much shorter than banner. Keel about 1 mm long the base 

 a little arched and end abruptly rounded to about 110 degrees and then 



