-, .^ LEGUMINOS.^. Astruyulus. 



I. Species with mi annual root, all low, mostly small. 

 § 1. Pod stronyly transversely wrinkled, didijmous, 1-seeded. 



1 A didymocarpus, Hook. & Am. .Sleiuler, from 3 inches to a foot high, 

 pub'esceiit with soiiio lino ami mthai- «catt,cml liuira. those of the po(hindo iuhI 

 calyx blackiah: lotillHs i) to If), imnowly obh.ii-^ to lijioiii' and more or Icsy ciinc- 

 ate, deeply notched at the apex: spike an inch or much less in lenyth, close: 

 flowers U to 2i lines long : curulla white and violet, its keel mtlexed at tip : pod 

 not over two lines long, short-oval and deeply 2-lobed lengthwise so as to be 

 divided into two cells, each nearly liUed by the single proportionally largo seed. — 

 Bot. Beechey, 33-i, t. 81. A. Catalinensis & .-1. niyrescens, Nutt. PI. Gaiub. 152. 



Low "rounds and slopes, oonimou through the western part of the State from Marin Co. south- 

 ward, flowering in spring. Like most annuals varying greatly in size and robustness. 



§ 2. Fod not zvrinkled, feio - many-seeded. 

 * Calyx blackish-hairy, much shorter than the violet or white and violet-tipped corolla: 

 pod not iujlated, hdween ohlomj and linear : Jioivtrs few and nearly sessile, croivded 

 in a small head ivhich does not lengthen in fruit. 



2. A. tener, Gray. Slender, a span or so in height, sparsely and minutely 

 pubescent : leallets 9 to 15, linear or cuneate-linear, ^vith or without a retuse or 

 notched apex: head 5 - 9-flowered : i.od between coriaceous and cartilaginous, 

 about half an hich long, 2-celled, 5 - 10-seeded. — l^roc. Am. Acad vi. 2UG. 

 Phaca astragalina, var., Hook. & Arn. Bot. Beechey, 334. Astragalus llypoglottis, 

 var. strigosa, Kellogg, Proc. Calif. Acad. ii. 115, lig. 37. 



Moist grounds, common around San Francisco Bay, &c. Corolla 4 or 5 lines long, often bright 

 violet, sometimes pale and violet-tipped. 



3. A. Breweri, Gray, 1. c Much like the preceding: leaflets broader, oblong- 

 obcorilate : h)rining i)oil' more ovate, G-ovuled, and 1-colled or nearly so. 



Sonoma Valley, common in lields. lircircr. Not since mot with ; the fruit unknown. Per- 

 haps not distinct from the preceding. 



* .* Calyx ivhitish-haired or nearly so : pod linear : Jloivers few and croiuded at the 

 apex of the peduncle. 



4 A Nuttallianus, DC. T^fore or less pubescent or hoary with white ap- 

 pressed liairs, soon dill'usely branched from the base: leaflets 11 or 13, oblong or 

 broadly linear and mostly notched at the end : calyx-teeth slender and as 1. ng as 

 the tube: corolla whitish and purple, about 3 lines long; the keel with the inilexed 

 tip narrowed : pod over half an inch long, laterally flattish, slightly scytheshapod, 

 the incurvation mostly near the base, deeply grooved on the back, acutish on the 

 other edge, 2-celled, severahseeded; the surface minutely reticulated, either glabrous 

 or with minute appressed hairs. 



Southeastern borders of the State (on the Uio Colorado, Newberry), and east to Texas and 

 Arkansas. 

 * « * Calyx white-pubescent or canescent : pod ovate and inflated : flowers racemose. 



5. A. Qeyeri, Gray. Sirigo.sfly somewliut hoary, branching from the base, a 

 spun hi'-h: Icallers 7 u\ 1 1, linear, less than hairiin inch long; raceme 3-7 flowered: 

 corolla "yellowish-whiU^ 3 lines long: ].od Ihin-hladdcry, half an inch long, very 

 oblique and the acute tip incurved, minutely lu^ary-pubescent, 1 -celled, many-seeded. 

 — Phaca annua, Geyer. 



W. Nevada, not far from the boundary ( JFatson) ; thence east to Wyoming, Gei/er, Parry. 



6. A. Coulteri, Benth. A span to a foot high, stouter, tomentose-canesceut or 

 the leaves silvery-silky : leaflets 9 to 19, obovate or oblong, sometimes emarginate, 

 3 to 5. lines long: raceme or spike loosely 10- 20-flowered : calyx-teeth shorter 



