19 8 



18 xVKGOPHYLLI. 



Polls) l-Ci'll'il, with tlors.il siUiire not raiseil within except u 

 little la A. cibiruis innl fonns of Missoiirieiirfis ami desperatu-, 

 rouiiti to obcompiuarfed a nl r.irely triquetrous in cross-sectioii, 

 mostly ovate to lanceolate in hMigitudiiml-sectioii, with utxHirve.l 

 tip and vcniiMl suture strai<^ht or concave, the dorsal suture very 

 convex, the body being obnque to arcuate, raraly b )L:i sutures 

 are nearly equally convex aiid so the po i is nearly symmetrical, 

 pod sessile or only shortly stipitate, mostly round d below and 

 splitting the calyx, but conspicuously tapering in A. iodanthus 

 Mud ain[»hioxys, often cordate at base, 1-5 cm. long (5-8 nun. i.i 

 A. lectulus), normally ^.'-2.5 cm. long, a little inflated only in 

 some shaggy-puddfd forms, and a little so in A. Zionis, desperatiis 

 and tephrodes, fleshy when fresh but the walls rarely 4 mm, wide, 

 generiilly cartilaginous when dry, wrinkled, and inclined to have 

 the sutures (which are denser) raised externally a ul r.ither sharp 

 on the edge when tlry but not raised wi'en fresh, very weakly at- 

 tached to the calyx and separating from it readily, rarely sulcate, 

 ascending (reflexed in A. desperatus), not opening much at ma- 

 turity and then at tip and along the ventral suture, triangular, 

 acute at tip, shortly racemose. Flowers 1 cm. long (rarely 5 mm. 

 long in A. desperatus) or more, mostly large and pink- purple, 

 rarely wliite or red. Calyx tube cylindrical, but somewhat later- 

 ally flattened, with teeth never over half the tube (rarely longer 

 in A. de-peratus) and mostly much shorter. Pedicels short, gen- 

 erally much shorter than the rather large bracts. i^edunclcH 

 mostly not longer than the leaves. Upper leaves the largest, pet- 

 ioled (except in forms of A. inflexus). Lejtflets never linear nor 

 conspicuously fleshy, flat, always jointed to the rachis. Stiji- 

 ules large (rather small in the Missouriensis group), never con- 

 nate, adnate, ovate to triangular-subulate or wider. Stems cfespi- 

 tose, perennial (A. amphioxys and desperatus bloom the first 

 year), sliort. prostrate below, often nearly acaulescent. from a 

 thick and often woody root, with the lower internodes very short 

 and stipules often imbricated. Plants rarely 4 dm. long, mostly 

 silvery-pubescent (nearly smooth in A. cibarius and iodanthus), 

 of the Lower Temperate life zone, rarely touching the edges of 

 the adjoining zones, blooming in cpring and fruiting in May and 

 June. 



KEY 



A. Pods never evidently woolly nor shaggy (except in A. desperatus, 

 Zionia, and Misaouriensis). Pubescence when present loosely 

 appressed. 

 AB. Pods not spongy nor conspicuously cellular when dry (except 

 in A. Shortianus) nor with the coats separating. 



