216 LEGUMINOSAE. 



(sec chaparral). Pod sickle-shaped when young. Banner with a yellowish or 

 whitish spot at base. Fruits very sparingly. 



4. LUPINUS L. Lupine. 

 Herbs or low shrubs with palmately 4 to 15-foliolate leaves. Stipules adnate 

 to the base of the petiole, seldom conspicuous. Flowers showy, blue, pinkish, 

 yellow or white, in terminal racemes or spikes. Calyx deeply bilabiate. Ban- 

 ner roundish, the sides mostly reflexed; wings commonly connivent by their 

 edges in front of and thus enclosing the mostly falcate pointed keel. Stamens 

 monadelphous, dimorphous, 5 with longer and basifixed anthers, the alternate 

 5 with shorter and versatile ones. Pod somewhat flattened, often constricted 

 between the seeds. Cotyledons thick and fleshy. (Latin lupus, a wolf, these 

 plants thought to rob the soil of its fertility.) 



A. Pods linear or oblong. 

 Bracts deciduous; ovules several; cotyledons of the seedling petioled. 



Low shrubs or at least suffrutescent, silky pubescent; petioles mostly short. 



Flowers sulphur-yellow; raceme often 1 ft. long 1. L. arborcus. 



Flowers not yellow, mostly blue. 



Herbage greenish; flowers blue or white; keel ciliate for its whole length; low, the 



stems merely suffrutescent 2. L. variicolor. 



Herbage silky. 



Flowers bluish or lavender, the banner with a yellow spot; keel glabrous; no dis- 

 tinct trunk 3. L. chamissonis. 



Flowers blue; keel ciliate; shrub with a distinct trunk 4. L. albifrons. 



Perennial herbs. 



Leaflets 5 to 7, more or less ciliate or ciliolate. 

 Herbage canescently silky. 



Leaflets oblanceolate or cuneate-oblong; root large, yellow; seashore species 



5. L. littoralis. 



Leaflets spatulate-oblong; root not yellow; montane species 6. L. sericatus. 



Herbage greenish, comparatively glabrous; montane or of the hills 



7. L. latifolius. 

 Leaflets 7 to 9, linear-lanceolate, 1 to 1 1 / 2 in. long; keel glabrous; plants mostly decum- 

 bent, with silky herbage 8. L. formosus. 



Leaflets 9 to 16, lanceolate or oblanceolate, 3 to 6 in. long; petioles l / 2 ft. long or 



more; plants erect, 3 to 5 ft. high, sparingly villous 9. L. polyp hyllus. 



Annual herbs. 



Flowers mostly 4 to 7 lines long; upper calyx-lip cleft or bifid. 



Lower calyx-lip 3-toothed or entire; leaflets ciineate-obovate, obtuse or emarginate; 



plants very stout and succulent 10. L. aflinis. 



Lower calyx-lip 3-dentate; leaflets oblanceolate, acute; plants slender, not succulent.. 



11. L. nanus. 

 Flowers mostly l l / 2 to 3 lines long. 



Slender plants; upper calyx-lip with divergent lobes. 



Lower calyx-lip long, entire 12. L. micranthus. 



Lower calyx-lip deeply 3-cleft 13. L. tritidus. 



Stoutish plants; upper calyx-lip bifid, the ovate segments short and parallel; lower 



calyx-lip entire or slightly dentate 14. L. polycarpus. 



B. Pods short and roundish or ovate. 

 Bracts persistent; ovules 2; cotyledons of the seedling broad and united by their bases; 

 annuals. 

 Upper lip of calyx herbaceous and entire; flowers pale yellow; stems simple below, widely 



branching above 15. L. lutcolus. 



I'pper lip of calyx more or less scarious, emarginate or cleft. 



Flowers commonly white or yellow; stem simple below, branching at the middle.... 



16. L. densiriorus. 

 Flowers light purple or flesh-color; stem commonly simple 17. L. microcarpus. 



1. L. arboreus Sims. Tree Lupine. Distinctly arborescent and 4 to 8 ft. 

 high, or Lower and merely suffrutescent; lightly pubescent on the young stems 

 and lower Burface of the leaves; Leaflets oblanceolate, I to -'•_> in. long, 9 to 

 11 «'ii the first leaves, 6 to 8 Oil the (later) Leaves from the axils, these smaller; 

 raceme with very indistinct verticils, often 1 ft. long; pedicels 5 lines long; 



