116 



LEGUMINOS^E. 



Lupinus. 



* * Perennials, dwarf and cespitose. — In the Sierra Nevada. 



Stems completely herbaceous, with rather long internodes. 



Loosely villous with long hairs. 25. L. ARinus. 



Appressed-silky, the hairs shorter. 26. L. minimus. 

 Stems leafy, from a spreading woody caudex : appressed-silky. 



Leaflets 7 to 10, obtuse : peduncles short : standard orbicular. 27. L. Bueweki. 



Leaflets 5 to 6, acutish : peduncles elongated : standard elliptical. 28. L. Lyallii. 



* * * Perennials, more or less shrubby at base, tall and leafy, silky-pubescent : petioles mostly 

 short : flowers large : ovules 6 to 12. 



Pubescence not dense : leaflets narrowly lanceolate : flowers yellow : 



ovules 10 to 12. 1. L. abboreus. 



Pubescence dense : leaflets broader, obtuse : flowers blue to white : 



ovules 6 to 8. 2. L. Chamissonis. 



■ Pubescence short, mostly tomentose : leaflets oblanceolate : bracts long : 



flowers blue : ovules 8 or 9* 3. L. Douglash. 



* * * * 



Perennials, herbaceous, mostly tall : flowers large : ovules 6 or more, excepting L. Sit- 

 greavii and L. Grayi. 



Leaflets smooth above, oblanceolate : flowers not yellow. 



Petioles elongated : stem somewhat succulent : bracts short and decid- 

 uous. Sparingly villous: leaflets 10 to 16, large: stipules 

 broad : ovules 9. 

 Petioles scarcely exceeding the (5 to 10) leaflets : bracts mostly long. 

 Nearly glabrous, erect : stipules narrow : ovules 8 to 10. 

 Calyx subvillous : stipules broader : bracts more hairy, subpersist- 



ent : lower petioles elongated : pedicels short. 

 More pubescent or villous, subdecumbent, leafy : leaflets 5 to 8, 



smaller : keel ciliate : ovules 10 to 12. 

 Puberulent and subvillous : bracts short : ovules 5. 

 Leaflets pubescent both sides, as long as the petioles : ovules 6 to 8. 

 Flowers yellow : keel ciliate : bracts long. 

 Flowers not yellow : bracts short : leaflets 5 to 9. 



Erect, tall : pubescence often scanty : keel narrow, strongly falcate, 



naked ; standard naked. 

 Subdecumbent, appressed-silky : standard silky ; keel ciliate. 

 Hoary-tomentose, a span high : standard naked ; keel ciliate. 



7. 

 10. 



L. POLYPHYLLUS. 



L. RIVULAKIS. 



L. BURKEI. 



L. LITTORAI.IS. 

 L. SlTGREAVESII. 



8. L. Sabisii. 



L. ALBICAULIS. 

 L. OENATUS. 



L. Grayi. 



***** Perennials, herbaceous, mostly rather low : flowers smaller : ovules 6 or less. 



Leaflets glabrous above, 



Mostly shorter than the petioles : standard naked. 



Tall, scantily puberulent : keel usually naked : pod small, 2 - 



4-seeded. 

 A span high or less, sparingly villous : keel strongly ciliate : pod 

 broad, 6-ovuled. 

 Equalling the petioles : appressed-silky : petals naked or nearly so : 

 pod short, 3-5-ovnled. 

 Leaflets pubescent on both sides. 



Leaves distant ; lower petioles elongated. 



Pubescence villous, spreading : bracts deciduous, often long : stand- 

 ard hairy : keel ciliate. 

 Densely silky-tonientose, stout : pedicels very short : bracts subper- 



sistent : standard very hairy : keel subciliate. 

 Densely appressed silky-villous, often low : bracts deciduous : stand- 

 ard naked. 

 Silky-villous : raceme dense : bracts persistent : standard oblong, 

 naked. 

 Stems leafy : petioles short. 



Standard and keel naked : calyx not spurred. 

 Puberulent, much branched, slender. 

 Densely silky-tomentose : flowers very small. 

 Standard and keel more or less hairy : calyx spurred. 



Finely appressed-silky : calyx strongly spurred : standard longest. 

 A ppressed-puberulent : leaflets narrower : petals equal, 

 (.lose silvery-silky : calyx slightly spurred. 



1!'. 



17. 



22. 



12. 



13. 



15. 



16. 



L. PARVIFLORUS. 

 L. ONUSTUS. 

 L. ARGENTEUS. 



L. SERICEUS. 



L. LEUCOPHYLLTJS. 



L. LEPIDtTS. 



L. CONFERTUS. 



L. Andersonii. 



L. MEIONANTHUS. 



L. CALCAEATTJS. 

 L. LAXIFLORUS. 

 L. HOLOSERICEUS. 



