6s 



The West American Scientist. 



66 



TRIFOLIUM TRIDENTATUM Lindl. 

 Genua MELILOTUS Tourncfort, 

 MELILOTUS ALBA Lam. 

 MELILOTUS PARVIFLORA Desf. 



Genus . AMORPHA Linnaeus. 



AMORPHA CALIFORNICA Nutt. 



Genus MEDICAGO Linnaeus. 



MEDICAGO DENTICULATA Willd. 



bur clover or toothed medick, @ of the Med- 

 iterranean region, which has become natural- 

 ized in most warm countries, valuable forage, 

 but more prominent in our gardens as a weed 

 <of rapid growth, da 5 js 

 MEDICAGO LUPULINA Linn. 



Black medick, nouesuch, black grass, hop 

 clover, @, or biennial, widely grown for pas- 

 ture. Or 60 d 

 MEDICAGO SATIVA Linn. 



Alfalfa is probably the best known & most 

 extensively grown forage plant in America, & 

 as known by manv names such as lucern, pur- 

 ple medick, Spanish trefoil, Brazilian clover. 



Genns PSORALEA Linnaeus. 



PSORALEA CALIFORNICA S. Watson. 

 PSORALEA MACROSTACHYA D. C. 

 PSORALEA ORBICULARIS Lindl. 



Genns GLYCYRRHIZA Linjjaeus. 



GLYCYRRHIZA LEPIDOTA Pursh. 

 Genns DALEA Linnaeus. 



DALEA CALIFORNICA S. Watson. 

 DALEA EMORYI A. Gray. 

 DALEA MOLLIS Benth. 



DALEA OROUTTII S. Watson. 



"Perennial, with numerous short slender 

 herbaceous subprocumbent or ascending 

 stems (3-4' long) from a woody 

 branching rootstock, appressed silky-pu- 

 berulenl: leaves 4-6" long, the folded 

 oblong-obovate leaflets (4-6 pairs) y. z " 

 long, glabrous above: peduncles about 

 equall ng the leaves: spikes short (%' 

 long), somewhat crowded, the fl. reflexed 

 or .spreading: calyx short-villous, turbi- 

 nate, the lanceolate acuminate teeth 

 equalling or exceeding the tube; the p. 

 orbicular banner and the wings scarcely 

 exserted, the broad twice-longer keel p. 

 on the inner margin."— S. Watson, Proc. 

 Am. Acad., xx. 359 (Feb. 21, 1885). 

 DALEA PARRYI Torr. & Gray. 



DALEA SCHOTTII Torr. 

 DALEA SPINOoA A. Gray. 



Genus ASTRAGALUS Toiirnefort. 



A LIMITUH Sheldon Minn but studies b9 12(5 



"t', robust, bushy but not woody, minutely 

 pubescent with sparse, ascending hairs; stems 

 A-'- din high, erect, thick, striate: leaves 10-12 



cm in length, numerous, rachis channelled; 

 leaflets 1-3% cm in length, in 5-9 pairs, orbicu- 

 lar, obovate or oblong, rarely obcordate, ob- 

 tuse or refuse; stipules triangular-ovate, ioli- 

 aceous, reflexed; peduncles thick, striate, ex- 

 ceeding in length the leaves, loosely subspi- 

 cate; fls 10-15 mm in length, spreading or re- 

 flexed; calyx cylindrical, api-ressed pubescent 

 with nigrescent hairs, the teei h unequal, 

 much shorter than the tube; corolla magenta 

 colored when fresh, becoming violet when 

 dried; legume 2-23^ cm in length, chartaceous, 

 horizontal or ascending, ovate, with a long, 

 incurved tip, finely short-pubescent, minute- 

 ly reticulate-veined, unilocular, man\ seeded. 

 .Near Indian wells & Carriso creek e Or." 

 A A LBATUS Sheldon Minn bot studies b 9 128 



,l @ or perhaps biennial, whitened through- 

 out with a fine, dense pubescence; stems 9-20 

 cm high, erect, simple, thick, l-4from they ! ish 

 root, finely striate; leaves 4-6 cm in length, 

 the rachis striate; leaflets 8-15 mm in length, 

 in 4 or 5 pairs, oblong, obtust ; stipules trian- 

 gu'ar acuminate, free, erect; peduncles o-5 cm 

 in length, terete, loosely 4-6 fl'ed: lis 5-6 mm 

 in length, erect-spreading, becoming deflexed; 

 calyx broadly campanulate, thj abruptly 

 pointed triangular teeth % _ 72 the length of 

 the tube; corolla whitish or ochroleucous; leg- 

 ume 11-12 mm in length, membranaceus-infla- 

 ted. ovate-ob.ong, acuminate pointed, the 

 ventral suture straight, the dorsal curved, 

 softly white-pubescent, unilocular, with nei- 

 ther suture introflexed, 2-6 seeded. Or e." 

 ASTRAGALUS ORCUTTIANUS S. Wats. 



"Stems numerous, slender, decumbent, 



1° long, spar ngly strigose-pubescent: 



leaflets 8-10 pairs, rounded, 1-3" broad: 



peduncles shorter than the leaves, 2-3' 



long in f r. ; raceme loose, few-fl.: calyx 

 campanulate, 2" long, the teeth mostly 

 equalling the tube: pod linear-falcate, as- 

 cending, coriaceous, attenuate to a stipe 

 shorter than the calyx, with a dorsal 

 groove and acute ventral suture, 2-celled 

 by the intrusion of the dorsal suture, 9" 

 long. Allied to A. Arizonicus, rather pe- 

 culiar in habit, the small round leaflets 

 upon an elongated rhachis exceeding the 

 raceme. In Cantillas Canon ("Tantillas" 

 of Palmer), Lower California, by C. R. 

 Orcutt, August, 18S3."— S. Watson, Proc. 

 Am. Acad., xx. 361 (Feb. 21, 1885). 



ASTRAGALUS COULTERI Benth. 



ASTRAGALUS CROTALARIAE A. Gray. 



ASTRAGALUS DISPERMUS A. Gray. 



ASTRAGALUS LEUCOPSIS T. & G. 



ASTRAGALUS OOCARPUS A. Gray. 

 ASTRAGALUS PARISHII A. Gray. 

 ASTRAGALUS SONORAE A. Gray. 

 ASTRAGALUS STENOPHYLLUS T.-G. 

 ASTRAGALUS TRICARINATUS A. Gry. 

 ASTRAGALUS VASEYI S. Watson. 



