VOL. 1v.] Contributions to Western Botany. 273 
spreading at tip; keel straight, with tip incurved a little more 
than 90°, obtuse, purple at tip, exceeding calyx teeth by two 
and one-half lines; pods mottled, colored, or plain, sessile, very 
acutely long or short-pointed with incurved tip, much inflated, 
broadly to narrowly ovate, inclined to be retuse at base, cross 
section round or a little wider laterally, sulcate ventrally nearly 
to the middle and the contiguous sides not adherent, sulcate 
dorsally to beyond the middle so that the sulci meet but there is 
no septum between even when young, though the parts adhere, 
with age they separate, the contiguous sides of the dorsal sulcus 
adhere when young forming a false septum so that the pod seems 
to be only slightly sulcate dorsally, but as the pod matures the 
sides separate and so it becomes didymous, apex of pod not two- 
celled; mature pods chartaceous to membranaceous, immature 
pods slightly pubescent within with wall one-fortieth inch thick. 
Neither peduncles, stems nor petioles perceptibly sulcate; stipules 
adnate, triangular, not small, ciliate and inclined to be lacerate 
on the edge, acute, lower not larger; flowers loosely short spicate; 
peduncles none to four inches long; flowers three to ten; pods 
prostrate as well as the flowers; whole plant very glabrous. 
This is a mountain plant coming down the cafions to 7500 feet 
altitude, grows on loose, gravelly places by the roadsides and is 
not abundant; it never grows in alkaline places. The pods are 
destitute of any internal sap at all times. It begins to bloom 
about May 1, and continues for a month; the pods are mature by 
the first of July. 
way of amplification of what I have said about the 
confusion in species of the A. lentéginosus and curtipes group 
(Zoe 4, 28) I append some notes on species kindly sent me by 
Mr. Brandegee. 
Aeeitatio near to oocarpus San Thomas, Lower California, 
April - Same as the following except more robust and 
tall; sania not longer than leaves, stout; stem coarsely 
sulcate; leaves six inches long; petiole none; leaflets about 
twenty pairs, an inch long; pods more acute; flowers white, four 
lines long, narrow, calyx the same; keel abruptly rounded, 
ae nearly equaling the oblanceolate, scarcely ascending 
ings; banner erect, small, barely a line longer than the keel 
t 
