•234 



of calyx tube ami abruptly so. straiglil beyond, hardly 1 cm. long. 

 Wings linear, about straight, about /-?> mm. longer than Ueel and near- 

 ly as much shorter than banner. The keel straight to near the tip and 

 then abruptly erect, about 3 mm. higii. rounded. Caly.\ tube 7-8 mm. 

 long and 3 mm. high, truncate below. in>eric(l on ihe iower and fleshy 

 corner, yellowish with loosely appre-sed l)ut rather long hairs with 

 shorter ones felted below. Pedicels rather slender, about 4 mm. long 

 in fruit and a.s long as the triangular-subulate bracts. Peduncles 2 3 

 dm. long, shorter than the leaves. Leaves short-petioled. Leaflets 

 rather conspicuously smaller above, of many pairs, elliptical, incl'ned 

 to be diamond-shaped and acute, 2-4 cm. long, finely and rather 

 sparsely silky-felted with appres>cd and tangled hair.s and with some 

 longer onei intermixed and mostly yellowish. Stems 1-3 ft. high, f ex- 

 iious, rarely erect, stout, with rather few internodcs much sho'ter 

 than the leaves. Blooming in summer and fall, growing on moist 

 banks and gravelly bars along streams from Fort Davis in western 

 Texas to the White Mts. New Mexico and souttward to Guerreiro 

 ■ Mex. Pringle's No. 1218 distributed as jjart of the type of A. Yapuiauus 

 is this specic>. 



Astragalus giganteus var. Yaquianus (Watson Proc. Am. 

 Acad. 23 270 18.^8 as species). This differs from the ^ pecies on y 

 in the calyx tube being 1.5 cm. long, the petals with exserted cla\\ . 

 the lanceolate and little arcuate banner about \.S. cm. long, the na 

 rowly-oblong wings a little longer than the keel, and keel hardly at u 1 

 arcuate, obliquely oblanceolate. half cuneate, and acutish. Stems a e 

 much shorter and straggling upward, the leaves longer and less pube^ 

 cent and with larger leaflets. Sierra Madie Mts. iMexico from Colo 

 nia Juarez to the Yaqui river along stream beds just on the edge of the 

 Tropical life zone. 



193 Astragalus Orizabae Seaton Proc. .Am. Acad. 28 117(18^3"* 

 Pod rugose, about 1.5 cm. long, when nearly globose 1 cm. wide and 

 high, when ovate (as in the variety) it is 2 cm. long and a little arched 

 the ventral suture is straight and deeply sulcate but not so dorsally, 

 beak conical and declined and 1-2 mm. long, base cordate, surface 

 somewhat short-hairy and sparsely felted, pod.s distinctly inflated, in 

 dense and sohrt spikes, on peduncles shorter than the leaves. FHowers 

 2 cm. long, narrow, ochroleucous or purple-tinged, in short and dense 

 Spikes, spreading. Banner linear-oblanceolate, 1.5 cm. long, slightly 

 ascending, with sides reflexed in the middle 2 mm. vk-ide, narrowed at 

 tip, fully 1 cm. longer than keel and 5 mm longer than wings. Wings 

 linear, straight, about 2 mm. wide, rounded. Keel with exserted claw, 

 5 mm. long.^2-3 mm. high, half-rhomboidal, with the rounded, purple 

 tip nearly erect, with base straight to the middle and then sharply ar- 

 cuate to nearly 91) degrees. Calyx broadly cylindrical, a little narrow- 

 er at tip and cleft deeper above and a little oblique at tip, inclined to 

 be truncate and nearly e(iually inserted at base, with teeth .--ubulate 

 ami rather lax and about two thirds as long as tube. Bracts triangular 

 and about 3 mm. long. Leaves line.iv. 2 3 dm long in the type, with 

 15-18 pairs of leaflets which are elliiuical. rounded, closely felted, in- 

 clined to be a little narrower below. 1 1 5 cm long in the type. Stems 

 tufted, zigzag, 1-2 dm. long, rather thick and woody at base, in rocky 

 places Mt. C3rizaba below Nexico City. Seaton. Hacienda Palmar 

 near Pachuca, Tuly 21 1905. Rose. Nat. Herb No. 452293. Near Irola 

 June 14 1899, Rose. Nat. Herb. No. 346530, the lowei plant on the sheet. 

 Barren hills near Esperanza, Puebla Aug. 17 1903, Rose. N'at. Herb. 

 No 450191. Near Calchicomula, Puebla, Rose, July 24 1901, Natj. 

 Herb. No. 395437. 



