277 Micranthi. 



ascending, ashy. Flowers 4-5 mm. long. Banner oval, about ^ 

 mm. long:, with sides reflexed about V2 mm. wide below, abruptly 

 erect at end of tube, waterlined, o^f^t-^n seemingly fiddle-shaped; 

 groove U-shaped and very broad and filling the whole banner above. 

 Wings oblong, arched 30", about 1 mm. wide^ about as long as ban- 

 ner, or 2 mm. shorter, oblique and ob+use at tip, the right hanVl 

 one incun^ed over keel, the other flaring, tips connivent, 2 mm. 

 ^Miiger than keel. Keel half-oval-obovate, about 2 mm. long, obtuse. 

 alyx a little over 1 mm. long, reddish, with acutish base, ashy, 

 ;ther shorter than the subulate and curved teeth, on a slender 

 pedicel about 1 mm. long which equals the linear and thin bract. 

 Peduncles axillai-y throughout, often twin, about 2 cm. long, filiform. 

 Leaves 3-4 cm. long, wide, the upper ones sessile. Leaflets about 

 pairs, seemingly linear but narrov.iy to broadly elliptical, obtuse, 

 ther thin, slender-petiolulate and rather cuneate at base, about 1 

 cin. long above, appearing green especially above but minutely pu- 

 l)escent. Stems 1-3 ft. long, prostrate in wide mats, many, simple 

 above, freely branched below, straight, with internodes a little 

 shorter than the leaves. Stipules triangular, green, about 4 mm. 

 long, not connate. Root thick, rather fleshy and erect. Stems 

 herbaceous to the very base. From Chat to Yreka California, grow- 

 ing on the sagebrush benches on the eastern edge of the Sierras. 

 Middle Temperate life zone. This has the flowers and habit of A. 

 Pulsiferje and debilis. 



253. Astragalus Esperanzcc n. sp. Pods about 1 cm. long, 3-4 

 mm. wide and 2 mm. high, oblong, neaily straight, the ventral su- 

 ture a little concave, shortly triangular-acute at tip with a small flat 

 mucro, obcompressed below, with cross section reniform, shining 

 when ripe and finely cross-nerved, opening throughout at both su- 

 i^ures, reflexed, broadly sulcate dorsally to the middle. Flowers 



_ leenish-white or purple-tinged, becoming yellowish when dry, about 

 -10 mm. long, about 10, spreading in a dense head. Banner oval, 

 r)-7 mm. long, arched sharply to nearly erect at calyx tips, with 

 sides reflexed 1 mm. wide below, about 1 mm. longer than wings^ 

 or about equaling them. Wings broadly linear, about 2 mm. 

 wide, arched to 45% 2 mm. longer than keel. Keel half-rhomboidal^ 

 about 3 mm. long and high, the base a little convex then abruptly 

 bent to erect and tip broadly triangular and acutish, exceeding the 

 calyx teeth by about 2 mm. Calyx tube about 2-3 mm. long, ni- 

 grescent, cleft deeper above, the triangular-subulate teeth about as 

 long and straight. Pedicels almost none, bracts lanceolate, white, 

 thin and about as long as calyx tube. Peduncles slender, about 

 •1-15 cm. long, longer than the leaves, axillary above, single. 

 Leaves 4-5 cm. long, broad, all short-petioled. Leaflets 8-12 pairs, 

 linear to cuneate-linear, blunt, about 8-15 mm. long, ashy with very 

 short and rough appressed hairs, not contiguous. Stipules conspic- 

 uously connate almost to the tips, rather hyaline, 5 mm. long. Stems 

 several, mostly from underground branches of a stout root, flexuous,. 

 spreading, a few inches to 2 ft. long, with many internodes 1-5 cm., 

 long, leafy. Esperanza Puebla Mexico, No. 3207 Purpus. In bloom in 

 August, evidently the second flowering of the year. Lower Tem- 

 perate life zone probably. Plateado Zacatecas Mexico. J. X. Rose 

 Nat. Herb. No. 301689, Sept. 3, 1897; Tlalnepantla state of Mexica. 

 July 6, 1905, J. N. Rose, Nat. Herb. No. 451904; Tulancingo state 

 of Hidalgo, J. N. Rose, Nat. Herb. No. 452311; Alvarez San Lui* 

 Potosi, Palmer, July 13, 1904, Nat. Herb. No. 471072. The Purpus 

 material in my herbarium is the type. 



254. Astragalus Chapalanus n. sp. About as in A. Esperanza* 

 but stipules minute and subulate and not at all connate. Pods 

 about 1.5 cm. long, obliquely lanceolate-oblong and a little arcbed,. 

 shortly acuminate, on stout peduncles 5-7 cm. long which aboul 

 equal the leaves. Leaves about 5 cm. long, sessile, of about 10-12 pairs, 

 or subalternate leaflets which are neariy contiguous, broadly linear„ 

 long-petiolulate, shortly cuneate at base. Stems about a foot hig-h„ 



