OF ARTS AND SCIENCES. 127 



an inch lung or more. — In tlic Siorni Nevada; near Clark's Ranch, 

 ]\Iariposa Co., Dr. Asa Gray; Indian Valley, Plumas Co., Mrs. M. 

 E. Pulsitcr Ames. With the lari^e Howers and loose racenu! of L. 

 onuifKS, hut otherwise more nearly allied to the L. Iciiro/i/ti/llns group. 



LuPiNUS ONUSTUS. A span high or less, with a decumhent and 

 somewhat Wdody base, rather sparingly silky-villous : leaflets five to 

 eight, oblanceolate, acute or acutish, glabrous above;, about an inch long, 

 the petioles two or three times longer: flowers deep liluc, small (four 

 lines long), scattei'ed in a loose short and shortly pcduudcil raceme; 

 bracts short, deciduous ; {)edicels slender : calyx sligiiily gibbous : ban- 

 ner naked ; keel strongly filiate : pod lialf an iiicili broad, an inch and 

 a half long, G-ovulcd : seeds brown, over three lines broad. — Indian 

 Valley, Plumas Co., by Mrs. M. E. Pulsifer Ames ; Sierra County, 

 Lemmon. Most nearly resembling L. parviflorus on a reduced 

 scale, but very distinct in its fruit. 



Trifolium (Lupinaster) Leiimoni.* Dwarf and cespitose, 

 alpine, sparingly appressed-pubescent, the short rather slender stems 

 from a stout thick perennial root : stipules ovate, acuminate, toothed ; 



* We give the following revision of the North American species of tliis 

 genus : — 



§ 1. Leaflets 5 to 7 : heads not invohicrate, terminal and axillary : flowers ses- 

 sile : calyx-teetii fihform, plumose : low or dwarf perennials. — Western 

 species. 



1. T. MEGACEPHALTiM, Nutt. Stout, somewhat villous : stipules ovate-ob- 

 long; leaflets obtuse, nearly an inch long : flowers in very large spicate heads : 

 pod smooth, 6-ovuled. — North-eastern California and Northern Nevada to Wasii- 

 ington Territory. 



2. T. Andersonii, Gray. Cespitose, densely villous : stipules lanceolate ; 

 leaflets smaller, acute, nearly entire : flowers smaller, umbellate : pod tomen- 

 tose, about 5-ovuIed. — Proc. Am. Acad. G. 522. North-eastern California and 

 Northern Nevada. 



3. T. Lemmoni, Watson. See above. 



§ 2. Leaflets 3 : heads not involucrate, terminal : perennial or biennial. 

 * Flowers on slender pedicels, large. — Eastern species. 



4. T. REFLEXDM, L. Not stoloniferous : leaflets obovatc to cuneate-oblong : 

 flowers numerous, umbellate on the summit of the peduncle: pod stipitate, 

 4 ovuled. — T. jiJati/ce/ihalum, Bisch. in Linnaea, 14. 132 (Litt-Bericht.). From 

 Canada West to Florida and Texas. 



5. T. STOLOXiFERUM, Muhl. Stoloniferous : leaflets broadly obovate, re- 

 tuse : flowers fewer, on an evident rhachis : pod nearly sessile, 2-ovuled. — Ohio 

 and Kentucky to Missouri. 



