266 PITTONIA. 
seems, by the geographical limits given by Mr. Wiegand, to 
form with him a part of B. Nashii, from the type of which 
it is assuredly most distinct. 
/ B. PERSICFOLIA. A yard high or more, glabrous, the 
leaves 3 to 5 inches long and surpassing the internodes, 
lanceolate, acute, rather finely serrate, narrowed to a short 
almost petiolar base, not connate or even auricled: heads 
many, large, hemispherical; outer involucre scarcely 
exceeding the inner: rays about 8, oblong, $ inch long, 12- 
nerved: disk-corollas with stoutish tube little longer than 
the subeampanulate limb, the whole quite equalled by the 
long awns, these 2 only, closely but slenderly aculeolate: 
achenes not known. 
Bradshaw Mountains, Arizona, 23 June, 1892, Mr. Toumey 
n. 680. Specimens in the U. S. Herbarium. 
íB. EXPANSA. Stems (or branches?) several feet long, 
simple, very leafy, apparently weak and reclining or a 
least strongly decumbent, terete, glabrous, glaucescent: 
leaves 2 to 4 inches long, lanceolate and elliptic-lanceolate, 
very acute, sessile, not connate, closely and evenly sub- 
serrate-denticulate with small callous teeth, or if more 
nearly serrate, the teeth still egllous-tipped: heads large, 
on naked or bracted peduncles 2 to 4 inches long: outer 
involucre inconspicuous, barely equalling the inner; bracts 
of the inner copper-colored, lacking the usual close black 
lineation: rays about 10, golden-yellow, an inch long, 12- 
nerved, very obtusely and lightly 3-dentate at apex: disk- 
corollas with slender tube slightly exceeding the limb, the 
whole much surpassing the awns, these 2 only, shortly 
and rigidly aculeolate: achenes nearly black. 
Southern California about San Bernardino, Parish, and at 
