200 



only when young. Plants blooming early in April and 

 May. 

 Pods lon^-hairy. 168 Zionis. 



Pods appearing nearly smooth. 169 rcmulcus, 



A23. Feds sci.ile, not evidently inflated, fleshy aud pulpy, 

 opening along the ventral suture. Pubescence attached by 

 tne iiiiddle or n^ar it and hairs pick-shaped. Plants acau- 

 lescent, or nearly so in small ^dts, Siioic-lived perennials 

 or winter annuals, some blooming the first year. 

 A2BC. Pods rounded at base, with loose outer coat separa- 

 ting from t ;e inner wsll either by a cellular interspace, 

 or by splitting and peeling off. Neither suture intruded, 

 both raised a liuls externally and thin. Pods not re- 

 flexed. 

 A23CD. Pods 1.5-5 cm. long, very oblique but not much 

 arcned and with tip variably but not greatly upturned, 

 smooth cr nearly so when ripe, triangular-apiculate 

 to conical beaked, with pulp coarsely cellular which 

 on drying leaves the two coats separated by a spongy 

 interspace, but the outer papery coat does not peel 

 up, this makes the dry pods very light and easily blown 

 about in the wind; inner coat thicker or toucher, char- 

 taceous. Flowers about 2.5 cm. long, mostly white or 

 brillian.-p...i:-purple, capitate, few, blooming very 

 early. Fed ncles decumbent at least in fruit. Plants 

 with thick, fleshy, tapering, long, erect tap root. 

 Poas wic i outer skin conspicuously reticulated, except 



var. laccoliticus. Flowers vv^hite or whitish. 170 pygmaeus. 

 Pods with outer skin not reticulated. Flowers dark- 

 pink purple. 171 Musiniensis. 

 A2BC2D. Pods about 1.5-2 cm. long, very fleshy, straight, 

 narrowly oblong, with cross-section nearly round 

 when fresh, 4-an5led and not spongy and with raised 

 sutures when dry, but outer coat drying close to the 

 inner wall and when old splitting along the ventral 

 suture and spreading out flat from tip to tip like a 

 wing but not separating along the dorsal suture, thus 

 giving tne pod an elliptical outline. In A. Missouri- 

 cnsis this is not so marked and often the outer wall 

 simply separates with age and flares a little. Flow- 

 ers not large. Claws of petals not exserted. V/hole 

 plant hoary even to the peduncles. Missourienses. 

 Pods broadly winged when dry. Flowers whitish. 



172 cymboides. 

 Pods not broadly winged when dry. Flowers purple. 



173 Missouriensis. 

 A2B2C. Pods 1.5-8 cm. long, narrowed at both ends, 



very acute, arcuate, fleshy but not cellular nor spongy 

 nor walls separating, ventral suture conspicuously _ 

 raised when dry and the dorsal not at all or very thin 

 Flowers large, 2-5 cm. long, brilliant-pink-purple 

 when fresh, bluish when dry. Stems and peduncles 

 hoary. 174 amphioxys. 



2A. Pods densely woolly or variably shaggy, seldom sulcate 

 ventrally and dorsally except at base, normally round to 

 cbcompressed in cross-section, sessile or with stipe not 

 longer than wide, conspicuously inflated only in A. New- 

 berryi and funereus forms, splitting the calyx, coriaceous 

 when dry, only slightly fleshy or, rarely, flesh is thicker 

 and cellular, arcuate at tip or, rarely, triangular-apiculate. 

 Flowers purple, rarely white or red, 1.5-5 cm. long, capitate. 

 Calyx tube cylindrical. Peduncles never much longer than 



