_Contributions to Western Botany. 43 
leaves oblong, about 1’ long; calyx tube 1-2’ long; fruit 3-4” long, 
5-ribbed and ribs glandular an usually thickened above. El 
Paso, Texas and southeastward. 
. A. crassifolia Gray Am. Jour. Sci. 2 14 319. Plants 
_ scabrous-puberulent, decumbent; leaves thick, rounded at base, 
ovate; flowers 6”’ wide; fruit ovate, scarcely ribbed. Western 
Texas, 
5. A. nummularia n.sp. Like A: crassifolia butleaves oval, 
13-2’ long, coarsely pinnate-ribbed, glaucous below, erose, black- 
dotted, clustered at base; flowers paniculate and panicle snes 
plants apparently erect. El Paso, Texas, Sept. 12, 1884. Jone 
4, ABRONIA Jussieu. 
All caulescent plants except the scapose A. nana; flowers 
often very fragrant, many, in a dense head; wings of fruit net- 
veined, sometimes rudimentary in A. umbellata and absent 
in A. alpina; seeds smooth and cylindrical; at least the flowers 
generally viscid; bracts of the involuere wrapped over the flow- 
ers in the bud; seeds chestnut colored. i 
Ovary lobed by the cavity extending into the wings there- 
by making the hase of wings double; wings wider abore, 
extending below the base of the seed only in A, cycloptera 
and A. micrantha; seeds acutish, flattish, 1%’’ long, nearly 
oblong, barely half filling the cavity in its length. 
» > 
AB. Widely spreading or czespitose perennials, with stout 
Stems when present; flowers fragrant, except in A. nana, 
not red; wings tapering from the apex to nothing at the 
base of seed. 
1. A. nana Wats. Proc. A. A. 14 294. Shortly-pubescent; 
cespitose and acaulescent plants; leaves elliptical and acute at 
both ends, sometimes with obtuse tip and truncate base, on very 
long petioles; peduncles scapose from a rather woody stem which 
