Didymocarpi. 286 



ends, about 2 mm. high, obcompressed somewhat or not at all, 

 didymous, sessile, few in loose and oblong heads, not reflexed, ap- 

 parently smooth, about 6 mm. wide, apiculate with a declined tip^ 

 finely and closely cross-ribbed, sulcate ventrally, both sutures raised 

 as narrow ribs, the dorsal convex and little if at all sulcate. Flow- 

 ers about 8 mm. long, purple, few in loose heads, narrow. Ban- 

 ner ovate, arched a little at calyx tips, with sides reflexed Vs mm. 

 wide, about 5 mm. long, 1 mm. longer than wings. Wings obliquely 

 oblong-lanceolate, 2 mm. longer than keel, arched a little, purple- 

 tipped. Keel about 3 mm. long and high, arched from base to a 

 half circle, veiy obtuse, about 2 mm. wide in the middle. Calyx 

 narrowly campanulate, 3 mm. long, acute at base, nigrescent, with 

 straight lower side and arched upper side, with subulate teeth lax 

 and nearly as long as tube. Bracts subulate, 2-3 mm. long, pedicels 

 1-2 mm. long. Peduncles 5-15 cm. long, longer than the leaves. 

 Leaves 5-10 cm. long, short-petioled. Leaflets nearly linear, rather 

 obtuse, apiculate, 7-15 mm. long, 6-12 pairs, rather long-petiolulate, 

 minutely pubescent with short and appressed white hairs, smooth 

 above, distant. Stipules lanceolate. btenis from perennial roots 

 and in the type erect, about a foot high and freely bi'anched 

 with short internodes and many leaves. On hillsides at Zacatecas 

 Mexico. Tropical. 



Astragalus diphacus var. peonis Jones Cont. 10 65 (1902). 

 Stems prostrate with ascending tips, silvei-y hoary throughout. 

 Flowers white, sides of banner folded back to the midrib nearly all 

 the length except at the very apex where with the notch is formed' 

 a heart-shaped enlargement, tip of banner is at nearly 30° to the 

 claw, it begins to curve at a point about 2 mm. beyond the calyx 

 teeth, the outline of the banner as folded is oblong with a triangular 

 base, no white spot but banner watei'lined. Wings ascending 30', 

 obliquely-oblong-oblanceolate, rounded, 1 mm. wide, 1 mm. longer 

 than keel and exposing the base of keel. Tip of keel blunt and 

 incurved 90% rounded at apex. The wings are incurved at tip and 

 flat. Flowers declined generally. Pod didymous, chartaceous, cross 

 section is that of the figure 8 laid on its side. Leaflets about 8 

 pairs, folded, 5-10 mm. long, elliptical. Calyx teeth triangular and 

 about half the tube which is rather hoary with white and black hairs 

 intermixed. Stipules deltoid, erect, green, 3 mm. long. Leaves 2-3 

 cm. long. Zacatecas Mexico, JoneS. May 16, 1892. 



272. Astragalus Angelinus n. sp. Pods very obliquely oval- 

 ovate, 5-7 mm. long, 3-4 mm. wide, 3 mm. high, truncate to slightly 

 cordate at the sessile base, reflexed in dense and short spikes, open- 

 ing first at base, faintly cross-ribbed, inclined to be flattened along 

 both sutures or very slightly shallow-sulvate, the ventral suture 

 straight above and ending in a minute mucro which is a little de- 

 clined, below it is much arched, the suture is very thick but little 

 raised, dorsal suture scarcely evident, very convex throughout, tip 

 of pod obtuse to a little retuse, but pod never didymous, cross 

 section oblately oval and with the ventral side rather flattened, 

 completely 2-celled to tip, coriaceous and very rigid, a little inflated, 

 minutely pubescent. Flowei-s gone. Calyx campanulate to subglo- 

 bose, about 2 mm. long, with subulate teeth about as long. Pedicels 

 stout, reflexed, about 2 mm. long, nearly equaled by the triangular 

 bracts. Peduncles rather slender, about 1 dm. long, axillai-y 

 throughout, arched, fruiting spikes 3-5 cm. long, oblong. Leaves 

 nearly 1 dm. long, about sessile, of 10-12 linear and retuse leaflets 

 narrowed and long-petiolulate below, distant, 1-1.5 cm. long, many, 

 with short internodes, spreading. Stipules triangular-subulate, 3-4 

 mm. long, . not connate. Stems slender, weak, and depressed or 

 decumbent from a rather woody but slender base, tufted and 

 branching at base, rai-ely a foot long. P"'rom near San Angel valley 

 of Mexico, J. N. Rose, Aug. 21, 1903. Nat. Herb. No. 450040. 

 Probably Lower Temperate life zone. Also near El Salto Hidalgo, 



