654 PROCEEDINGS OF THE AMERICAN ACADEMY 



acuminatis longe petiolatis alternis, superiovibus parvis paucis interdum 

 oppositis lanceolatis sessilibus integerrimis ; involucri squamis confor- 

 mibus suba?qualibus erectis ovato-lanceolatis ciliolatis basi nervosis ; 

 ligulis 12 - 15 ; acheniis cum ala latissima tenui orbiculatis sinu lato 

 eraarginatis laevibus. — Open woods, Texas, near Houston, Lindheimer 

 (anno 1842, ex Engelmann), E. Hall, 1872. The radical leaves in 

 Lindheimer's specimen are larger, 10 to 15 inches long, including the 

 slender petiole, and pubescent beneath. Hall's plant has smaller 

 leaves and less pubescen e. 



Zinne^e Benth. This subtribe of Helianthoidece appears to be well 

 founded, by Bentham, upon six Mexicano-North-American genera ; 

 and, as he remarks, our Heliopsis of the United States seems to hold 

 its sessile ligules as' persistently on the fruit as does the Mexicano- 

 South-American species. But the use which is made of this chai^acter 

 might call for the addition to the subtribe of a species which I long 

 ago characterized as forming a subgenus of Balsamorhiza, and which 

 has remained unnoticed, namely: — 



Balsamorhiza (Kalliactis) Careyana Gray, PI. Fendl. p. 81. 

 In this the ligule becomes as dry and papery as in any Zinnia, and is 

 equally persistent ; but while the latter is continuous, the former has the 

 short tube of the ligule evidently articulated with the summit of the 

 achenium. The styles, etc., being exactly as in Balsamorhiza, the 

 species ought not to be separated from that genus. But it further 

 differs from all the other species in its cinereous-pubescent achenia. 



Wyethia Nutt. In a natural arrangement this genus should stand 

 near to the preceding, to which it is much more related than to the 

 proper Helianthus-group. The pappus is of the coroniform order, 

 and perfectly continuous with the broad summit of the achenium, 

 which is very obtusely quadrandular in the typical Alarconia and 

 its near ally ; the sides in all are nerved. The species, as far as known, 

 are subjoined.* 



* WYETHIA Nutt. (Alarconia DC.) ■ 



§ 1. Achenia crassa, quadrata, angnlis obtusissimis, pappo calyciformi 5 - 8- 

 fido rigido coronata. Capitula magna, latissima, foliaceo-bracteata, seu 

 involucrum foliaceum amplum. Folia lata, amplissima. 



1 . W. helenioides Nutt., Gray, PI. Fendl. Tomentosa vel tomentulosa ; 

 acheniis cinereo-puberulis ; dentibus corolla; disci extusparce hispidulis. Alarconia, 

 DC. 



2. W. glabra Gray, Proc. Amer. Acad. 6, p. 543. Glabra, glutinosa; 

 acheniis glabris ; dentibus corollae disci brevioribus glaberrimis. 



