OP ARTS AND SCIENCES. 7 



has been noted by Bentham and others. The published specific name 

 of corymbosa is quite inapplicable to a plant with elongated and single 

 monocephalous peduncles. 



What should be done with the other radiate Flourensia of DeCan- 

 dolle, F. thurifera, seems uncertain. Perhaps it should be retained 

 as a section of that genus, under Bertero and Colla's name (not Cas- 

 sini's) of Diomedea. It is no Helianthus. And the following is still 

 farther from that genus. 



Flourensia cernda, DC. 1. c. ; Gray, PI. Wright., &c. Hemsley 

 calls this " Helimithus cernua^ Benth. & Hook. Gen. PI. ii. 376 " ; 

 but Bentham, in the work cited, can hardly be said even to refer this 

 and its true congener (notwithstanding the different habit) F. laurifolia, 

 DC, to Helianthus, although he has not otherwise disposed of these 

 peculiar species. They may justly be regarded as the type of Flou- 

 rensia^ for DeCandolle figured F. laurifolia to illustrate his genus, 

 which, thus restricted, is a very good one. But DeCandolle's charac- 

 ter "corollte disci faux vix tubo latior" is inapplicable to these 

 species, as also to F. thurifera. They have a rather slender proper 

 tube, which is abruptly enlarged into the much broader and campanu- 

 late or cylindraceous throat. 



Helianthus Parisiui. H. (7a///orn?'co affinis, ultra-orgyalis ; foliis 

 elongato-lauceolatis pube molli brevi cineris vel canescentibus supra 

 scabris ; capitulis semipollicem altis ; ligulis ultrapollicaribus ; invo- 

 lucri bracteis lineari-subulatis disco longioribus basi villosis ; corollis 

 disci supra tubum sericeo-annulatis ; pappi paleis tenui-subulatis. — 

 S. E. California, near San Bernardino, in wet places and along streams, 

 S. B. ^ IF. F. Parish. 



Encelia. The presence or absence of pappus proves to be unim- 

 portant, and far from constant in the same species. TVTierefore, in 

 adopting Bentham's rightful consolidation, the primary sections should 

 be reduced, by referring Gercea to Euencelia, and Barrattia to Simsia. 



Encelia microphylla, Gray, Proc. Am. Acad. xv. 37, a North- 

 ern Mexican species, of which mature fruit has recently been collected 

 by Palmer, has shrubby stems, foliage not unlike that of Flourensia 

 certiiia, and the relationship of the two is apparent. It has a pappus 

 of two slender villous awns, which sometimes barely equal and some- 

 times much surpass the white villosity of the akene. 



Encelia scaposa, Simsia (Gercea) scaposa, Gray, PI. Wright. 

 ii. 88, is of the genus ; but not F. microcephala, which is a genuine 

 Helianthella, to a peculiar section of which must be referred the 

 anomalous E. nudicaulis and E. argophylla. 



