Lupinus. LEGUMINOS^E. H5 



stipules small, subulate : racemes short (| inch long) and few-flowered ; bracts de- 

 ciduous ; pedicels 3 lines long, bracteolate : calyx narrowed at base : pods smooth, 

 coriaceous, compressed, reticulated and with nervelike margins, 3 or 4 inches long, 

 more or less contracted between the thick oblong seeds (^ inch long) ; stipe exceed- 

 ing the calyx. Proc. Am. Acad. xi. 135. S. speciosa, Torr. in Pacif. II. Kep. iv. 

 82 ; not Benth. 



Collected by Dr. Bigelow at Cactus Pass and on White Cliff Creek, near Bill Williams River in 

 Western Arizona ; in fruit, January. The pod is thinner and more compressed than is usual in 

 the genus, and the seed more oblong. 



4. LUPINUS, Linn. LUPINE. 



Calyx deeply bilabiate, bibracteolate. Standard broad, the sides reflexed : wings 

 united above, enclosing the incurved beaked keel. Stamineal tube not cleft ; an- 

 thers alternately oblong and rounded. Stigma bearded. Pod 2-valved, compressed, 

 coriaceous, 2 1 2-seeded. Annuals or perennials, herbaceous, or a few species 

 somewhat woody. Leaves palruately 1 16-foliolate; stipules adnate to the petioles; 

 leaflets entire. Flowers in terminal racemes, verticillate or scattered (solitary and 

 axillary in a single species), bracteate. Watson, Proc. Am. Acad. viii. 517. 



Much the larger number of the species of this veiy difficult genus belong to Western America, 

 only a few annuals occurring in the Mediterranean region, and less than half a dozen in the 

 Atlantic States, two of which are peculiar in having unifoliolate leaves. Two species are found 

 in Alaska and British Columbia, 60 or more are natives of our western coast and the interior 

 region west of the Rocky Mountains, a dozen are Mexican, and 15 or 20 belong to the Andes. 

 Ours are of little value economically, but rather the contrary, some growing so abundantly in our 

 grain-fields as to be injurious. Many species are showy, and several have long been cultivated for 

 ornament. 



Annuals. 



Flowers axillary, solitary : ovules 2 : dwarf. 44. L. UNCIALIS. 



Flowers racemose : ovules 2 : bracts persistent. 



Rather stout : flowers in whorls : peduncles elongated. 

 Leaves approximate ; petioles long. 



Long-villous : flowers mostly purple. 39. L. MICKOCARPUS. 



Smoother : flowers yellow to wflite. 40. L. DENSIFLORUS. 



Leaves scattered ; petioles short : pubescence short, appressed. 41. L. LUTEOLUS. 



Low or dwarf : flowers scattered. 



Hirsute : leaflets 5 : racemes nearly sessile. 42. L. PUSILLUS. 



Villous or subglabrous : leaflets 7 : peduncles long. 43. L. BREVICAULI3. 



Flowers racemose : ovules several. 

 Flowers in whorls : bracts deciduous. 



Puberulent : leaflets broad, smoother above : bracts short. 29. L. AFFINIS. 



Villous : leaflets narrow, pubescent both sides. 



Bracts elongated : flowers rather large : banner broad. 30. L. NANUS. 



Bracts short : flowers small, narrow. 81. L. MICRANTHUS. 



Flowers scattered : bracts mostly somewhat persistent. 

 Rather tall, slender : leaflets linear. 



Leaflets 8 to 10, smooth above : bracts long, deciduous. 32. L. LEPTOPHYLLITS. 



Villous : leaflets 5 to 9, the upper much smaller : bracts 



short. 33. L. SPAKSIFLORUS. 



Puberulent : leaflets 5 to 7, truncate : bracts short. 34. L. TUUNCATUS. 



Stouter, branched : leaflets broader : flowers large : bracts short. 

 Puberulent : standard yellow ; wings pink : bracts deciduous : 



pod smooth. 35. L. STIVEKI. 



Very hispid : flowers purple. 36. L. HlRSUTlssiMTTS. 



Low, villous : leaflets broader : flowers small : bracts short, per- 

 sistent. 



Hairs long : petals 3 or 4 lines long : lower lip of the calyx nar- 

 row and trifid. 37. L. CONCINNUS. 

 Hairs short : flowers smaller, narrow : racemes subsessile : lower 



lip broad, subentire. 38. L. GRACJLIS. 



