166 



11 ULIGINOSI. 



Pods fleshy when green and cartilaginous when dry, barely 

 or nearly 2-celled by the intrusion of the dorsal suture as a thin 

 partition (except at the tip where it ia 1-celledj, sessile, cross- 

 ribbed, oval to narrowly oblong, rounded at base, sulcatedorsally, 

 with ventral suture thick and raised externally and convex}i_when 

 pod is straight (except perhaps in A. terniiiialis), with cross-sec- 

 tion round to reniform, with declined tip not ^evidently flattened 

 and forming either an abrupt point or a strong subulate beak and 

 the pod being abruptly pointed, 1.5 to 2 cm. long, with the hard 

 walls barely 1 mm. thick wheii green. Flowers greenish-while 

 (purplish in A. terminalis), stubby, about 1 cm. long, spicate, ro- 

 flexed (but potls not). Calyx short-cylindric, with teeth not half 

 the tube. Bracts ami stipules triangular-acuminate and mostly 

 rather long. Leaflets many pairs, hardly contiguous. Upper 

 petioles rarely twice as long us the lowest leaflet, the lower peti- 

 oles sometimes 2-:^ times as long. Pubescence rather scanty and 

 closely a [)pret-sed, of flat and broad liairs fixed near the middlf. 

 Stems sk'i.di'r, 1-5 ft. high, eri'Ct or nearly so, simple or slightly 

 branched, few, })i'i-rnnial. Plants of the Middle Tem])cratt' life 

 zone, rarely extending a little into the Lower Tenijiernte, grow- 

 ing in moist meadows or along streams in p'>or soil in valleys, also 

 on edgex of cop-cs, in open woods and on prairies. 



KEY 



A Pods not evidently inflated, narrowly oblong, triangular-beaked, 

 a little arcuate, racemose, rather tew, 1.2-2 cm. long, 4-5 mm. wide or 

 high, with cross-section cordate to reniform. Flowers not in dense 

 spikes. Plants with few internodes, the stems not over a foot long. 

 Leaflets 5-8 pairs, about 1 cm. long. 



Pods appressed-erect. 122 terminalis 



Pods horizontally spreading. 123 Oreganus 



2A Pods variously inflated, oval to oblong, conical-beaked, many, 

 densely ?ipicate, rarely loose below, closely appressed, with nearly 

 round cr iss-section. Flowers greenish-white, nearly sessile in dense 

 spilic-.. Ti 11 plants, with many large and broad leaflets. 



Po^ls with thick walls and little inflated, 124 Canadensis 



Pods with thin walls and much inflated, 125 neglecti s 



