658 PROCEEDINGS OF THE AMERICAN ACADEMY 



aceis ; ligulis paucis (flavis) brevibus ; disci corollis atro-purpureis, 

 paleis obtnsissimis vel truncatis ; acbehiis (immaturis) undique villosis- 

 simis 1 - 2-aristatis, aristis basi villosissirais. — Sierra Abayo, New 

 Mexico? Dr. Newberry in McComb's Expedition. Heads 2 to 4, 

 on rather short peduncles, only 4 lines high ; the oblong rays hardly 

 exceeding the disk. 



EncELia (Gerjea) albescens. Herbacea ? pube sericea brevi 

 scabrida argenteo-canescens ; foliis (ramealibus) alternis ovato- seu lan- 

 ceolato-oblongis subintegerrimis basi subcuneata trinervatis breviter 

 petiolatis ; capitulis solitariis longius pedunculatis ; involucri biserialis 

 squamis lanceolatis asqualibus canescentibus ; floribus luteis ; ligulis 

 8 — 10 obovatis majusculis ; paleis receptaculi acutis ; acheniis (im- 

 maturis) cuneato-oblongis prater margines creberrime sublonge ciliatos 

 fere glabris ; pappo 1 - 2-aristellato nudo. — In the western Mexican 

 province of Sonora, Dr. Edward Palmer, coll. 1869, no. 21. Leaves 

 in the specimen less than an inch long, the short petioles not dilated at 

 base. Rays half an inch long. Young achenium slightly emarginate 

 at the apex, the dense ciliate hairs of the margin in length scarcely 

 equalling half its width, or at the summit rather longer, and about 

 half the length of the longer delicate naked awn of the pappus, the 

 other awn seldom longer than the hairs, often shorter or obsolete. In 

 aspect and in the nature of the pubescence this very much resembles 

 another scarce Composita of the same region, namely, Viguiera nivea 

 (supposing it to be the Encelia nivea of Bentham, Bot. Sulph.), the 

 plant described by me in Bot. Mex. Boundary as HeUanthus tephrodes. 

 That, by the pappus and ovary, is evidently a Viguiera. The present 

 plant is a good Encelia, of the Gercea section by the pappus, although 

 the awns are unusually delicate and one of them inclined to disappear. 

 The villous ciliation of the achenium, although shorter than in its 

 congeners, is too long and dense for a Simsia. 



Encelia (Barrattia) calva, Simsia calva Gray, PL Lindh. 2, 

 p. 228, is remarkable for the pair of foliaceous stipule-like appendages 

 at the base of uniformly opposite leaves. These are altogether want- 

 ing in 



Encelia (Barrattia) Ghiesbreghtii. Herbacea? ramosa; va- 

 mis gracilibus foliosis ; foliis omnibus oppositis angusto-ovatis acurai- 

 natis rariter serratis basi truncatis vel subcordatis supra hirtello-velu- 

 tinis subtus molliter canescenti-sericeis ; petiolis brevibus inappendicu- 

 latis ; involucro campanulato Simsice, squamis lineari-subulatis villosis 



