FABACEAE. 189 



the sides reflexed; keel petals distinct, oblong, obtuse. 

 Stamens distinct. Pod linear, compressed, straight, 

 several-seeded. 



1. X. montana (Nutt.) Greene. Shrub 1-2 m. high, the branches 

 widely spreading; leaves crowded; leaflets 6-18 mm. long, oblance- 

 olate, acute, entire, somewhat silky-pubescent when young; flowers 

 near the ends of the stiff spinescent branchlets, on short 2-bracteolate 

 peduncles, rose-colored or purple, 15-20 mm. long. {Pickeringia 

 montana Nutt.) 



Occasional in the chaparral belt throughout our range. 



2. LUPINUS L. Lupine. 



Annual or perennial herbs or woody plants, with pal- 

 mately 5-15-foliate leaves and adnate mostly incon- 

 spicuous stipules. Leaflets entire. Flowers in terminal 

 racemes, verticillate or scattered. Calyx deeply bilabi- 

 ate; upper lip notched; lower entire or sometimes 3- 

 toothed or 3-cleft. Standard broad, the sides reflexed; 

 wings united above, enclosing the incurved beaked keel. 

 Stamens monadelphous, dimorphous; 5 anthers oblong, 

 basifixed, the other 5 rounded, versatile. Stigma 

 bearded. Pod 2-valved, compressed, straight. 



Ovules several in each pod; annuals. 

 Flowers not verticillate. 



Herbage sparsely to densely pubescent 

 or villous. 

 Herbage finely and sparsely pubescent, 



becoming almost glabrous. 1. L. truncatiis. 



Herbage densely villous or pilose. 



Keel ciliate toward the base. 2. L. sparsiflorus. 



Keel naked. 



Leaves oblanceolate; pet- 

 als 8 mm, long. 3. L. concinnus. 

 Leaves cuneate-obovate; petals 



6 mm. long. 4. L. agardhianus. 



Herbage hispid with viscid stinging hairs. 5. L. hirsutissimus. 

 Flowers verticillate. 



Keel ciliate; petals 4 mm. long. 6. L. micranthus. 



Keel naked; petals 10-12 mm. long. 7. L. affinis. 



Perennials. 

 Herbaceous. 



Herbage nearly glabrous; keel ciliate. 8. L. cytisoides. 

 Herbage silky-pubescent; keel naked. 9. L. formosus. 

 SuftVutescent or shrubby. 

 Keel ciliate. 



Lower calyx-lobe entire; seeds dark. 10. L. longifolius. 

 Lower calyx-lobe 3-toothed; seeds 



