888 MR. F. N. WILLIAMS: REVISION 
Subsectio 5.— Flores longe pedicellati, in cymas paucifloras 
dispositi. 
83. A. SrvEBELIL, Hieron. Pl. Stuebel., in Engl. Bot. Jahrb. 
xxi. 1895, p. 307. 
Glauca. Caules permulti adscendenti-erecti subsimplices vel 
basi ramosi, pilis reversis brevibus minutis superne densius sub- 
hirtello-puberuli, 10 centim. Folia lineari-lanceolata, acuta vel 
subacuminata, utrinque puberula (pilis brevissimis sparsis), ad 
marginem versus et subtus nervo mediano prominente scabrida 
(pilis reversis). Pedicelli longi erecti scabrido-puberuli. Sepala 
ovata; exteriora acuminata anguste membranaceo-marginata 
scabrida basi ciliata dorso carinata, interiora obtusa breviter 
mucronata late membranaceo-marginata. Petala alba ovato- 
oblonga leviter emarginata. Ovarium ovatum. 
-Hab. Bolivia. 
84. A. saxosa, A. Gray, Pl. Wright. ii. p. 18 (1898), ex 
Smiths. Contrib. v. ; Robinson, in Proc. Amer. Acad. xxix. p. 293 
(1894). 
Viridis, leviter puberula. Caules 5-50 centim., simplices el 
utplurimum a basi ramosi permulti decumbentes dein erecti. 
Folia oblongo-lanceolata uninervia subglabra, obtusa vel apicu- 
lata, subsessilia vel in petiolum brevem contracta. Sepala ovato- 
oblonga acuta glabra membranaceo-marginata, nervo valido. 
Petala calycem squantia. Semina lenticularia. 
B. cinerascens, Robinson, in Proc. Amer. Acad. xxix. p. 299 
Rigidior cinerascens. Folia pungentia. (Herb. Columbia Coll.) 
Hab. Huachuca Mtns., in Arizona (J. G. Lemmon). 
This is a species of wide range, occurring alike in rocky 
subalpine regions and much lower upon sandy banks, according 
varying much in height and diffuseness of branching. The 
character of the seeds is not given in the original description, but 
in the specimens in Herb. Kew. they are lenticular, smooth an 
shining : I have no hesitation therefore in placing the plant m 
this subgenus. Mr. B. L. Robinson says that it shows transs 
tion to typical forms of A. lanuginosa; but its diagnos" 
characters do not warrant its reduction to that polymorphous 
species. 
Geogr. limits.—N. United States: Colorado. 
S. d W. Mexico: Lower California. 
E. United States: Guadeloupe Mtns. in Texas. 
