158 Reventi-Arrecti. 



REVENTI-ARRECTI. 10. 



Pods with dorsal suture variously intruded but rarely 

 touching the ventral, with texture cartilaginous and decidedly 

 fleshy to simply chartaceous, somewhat inflated, about 

 straight (arcuate in the A. vallaris section), rarely a little 

 arcuate, with declined tip (except in A. accidens), stipitate, 

 rarely nearly sessile, firmly attached to stipe and calyx and 

 not separating from them, narrowly ovate to linear, or oval 

 erect though the calyx is rarely reflexed, (a little reflexed in A. 

 vallaris and accidens) mostly acute at both ends, nearly 

 smooth when mature, 1-6 cm. long, cross-ribbed or corrugated, 

 sulcate dorsally, opening first at tip along both sutures, with 

 cross-section deltoid to triangular-cordate or nearly round, 

 with ventral suture raised, thick or very thick, prominent, 

 convex toward the tip of pod and mostly so at base, pod never 

 sulcate ventrally except in A. vallaris and Bolanderi, 1-celled 

 at tip and flat-beaked, racemose, (spicate in A. Bolanderi). 

 Flowers rather many, ascending, mostly white or purple- 

 tipped, about 8-20 mm. long. Calyx short-cylindric or rarely 

 campanulate, with teeth rarely half as long as tube, nigrescent, 

 tube hyaline, inserted on the lower corner and with the upper 

 corner rounded to it and convex and tlie lower side straight, 

 the mouth oblique and cleft deeper above. Pedicels rather 

 stout, as long or twice as long as the small and rather decid- 

 uous bracts. Peduncles sulcate, less pubescent than the 

 leaves, strict, mostly long. Leaves long and narrow. Leaf- 

 lets many, rather long-petiolulate, 1-2 cm. long, the lower not 

 opposite, gradually smaller toward the tip of the tapering 

 rachis. Stipules mostly rather large, hyaline, not connate 

 below (for the most part), often imbricated. Proper stems 

 with few nodes except in the A. vallaris group, inclined to be 

 short and erect, terminated by the mostly long peduncles 

 (but peduncles axillary in the accidens and vallaris groups), 

 nearly smooth, many in tufts from the rather woody root. Pu- 

 bescence of flat and mostly wide hairs fixed by the base and 

 at right angles to the junction and so closely appressed, 

 rarely tangled and somewhat woolly, mostly sparse. 



KEY 



A. Pods sessile, or on a very thick pseudostipe made by the shrink- 

 ing of the flesh when dry. appressed and erect, barely inflated, 

 nearly 2 cm. long, 4-7 mm. wide, 4-5 mm. high, rather fleshy, car- 

 tilarjinous and wrinkled, splitting the calyx, shallow-sulcate or al- 

 most flat on the back (dorsal side), almost wholly 1-celled, the 

 dorsal suture a mere ridge within or slightly raised, somewhat 



