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 em. long, eross-ribbed or corrugated, 
suleate 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-eylindrie 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 the lower side straight, 
the mouth oblique and eleft deeper above. Pedicels rather 
stout, as long or twice as long as the small and rather decid- 
uous bracts. Peduneles suleate, less pubescent than the 
leaves, strict, mostly long. Leaves long and narrow. Leaf- 
lets many, rather long-petiolulate, 1-2 em. 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 peduneles 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, 47 mm. wide, 45 mm. high, rather fleshy. car- 
tilaginous 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 
