32 PROCEEDINGS OF THE AMERICAN ACADEMY 



Palmer. Thoroughly distinct from the Actinea chnjsanthemoides, 

 II BK. ; the heads and rays as large as in Kunth's figure of that 

 species, larger than in any specimens of it we possess. 



IIelenium Tiiurbeiu. i/. ooc/f«/o affinis, pariter annuum; paleis 

 pappi breviusculis ovatis obtusis muticis ; foliis lineari-lanceolatis inte- 



§ 2. EuACTiNELLA. Involucrutii polyphyilum, simplex, nempe, e bractois 

 gradatim 2-3-seriatis suba?quaiil)us discretis lierbaceis vel submembranaceis : 

 rcceptaculuni sa^pius conicum vel liemispliajricuni : pappi palece sursum sa;piu8 

 angustatae vel aristatae. 



* Suffruticosa, caulescens. Am. Merid. 

 A. IIETEROPHYLLA, Juss., sub Actinea, Pcrs. Cejihalophora hcternphijlln & Cra- 

 diata {l),hess. Certainly belongs here ratiier than to Cephalophora. Our speci- 

 mens are incomplete. 



* * Annua, caulescens, integrifolia ; receptaculo conico. Am. Bor. 

 A. LiNEAKiFOLiA, Torr. & Gray, Fl. ii. 383, ubi syn. 



* * * Perennes, Am. Bor., caudice multicipiti, raro simplici. 

 -1- Scaposa;, monoccphalae, plerumque integrifolia;. 



A. SCAPOSA, Nutt., var. linearis, Nutt. 



A. ACAULis, Nutt. — Var. glabra. A. (jlabra & A. Torrer/ana, Nutt. 



A. depressa, Torr. & Gray, PI. Fendl. 100, cum var. pygm^a. 



■*-■*- Caulescentes, mono-oligocephalaa, integrifolia;. 



A. ARGENTEA, Gray, PI. Fendl. 100. 

 A. LEPTOCLADA, Gray, Pacif. E. Exp. iv. 107. 

 ^- ^- H- Caulescentes, humiles, mono-oligocephala;, ssepius megacephalae, foliis 



plerisque divisis. 



A. Brandegei, T. C. Porter; Gray, Proc. Am. Acad. xiii. 373. 

 A. GRANDiFLoRA, Torr. & Gray, in Bost. Jour. Nat. Hist. Soc. v. 110. 

 « # « « Biennes vel annua^, IMexicanjc, pleio-megacepbala; ; caulibus robustis 

 foliosis ; foliis omnibus 1-3-pinnatipartitis. — llymenoxijs, Benth. & Hook. 

 Gen. 1. c. 



A. iKSiGNis. Vide supra. 



A. ciirysaxtiiemoides, HBK. Nov. Gen. & Spec. iv. 298, t. 411, sub Actinea. 



The developed receptacle in all our specimens is high and narrowly conical. 



The preceding species has probably been confounded with this ; but tlie very 



different pappus should at once distinguish it. 



§ 3. Hymenoxys. Involucrum pi. m. duplex, e bracteis coriaceis erectis, 

 extimis sa?pissime aut basi aut altius cupulato-connatis : receptaculuni coni- 

 cum. Ilerbae caulescentes, annuse, biennes, vel raro perennes. — Hijmenoxys, 

 DC. excl. sp. ult. 



* Capitulum liomogamum : involucro utroque 7-8phyllo, bracteis latis obtusis. 

 — llymenoxijs, Cass. Anier. Jlerid. 



A. anthemoides. Gray, PI. Wright, i. 122, &c. Hymenoxys anthemoides, Cass. 

 n. Ilccnkeana, DC. Prodr. ? 



