194 PROCEEDINGS OF THE AMERICAN ACADEMY 



aclnate to their base, which seem to represent the villi of the pappus in 

 3fadarogIossa, but are hardly distinguishable from those that clothe the 

 acheuium. The smaller subdivision, containing L. chrysanthcmoides 

 {Oxyura DC), has a very convex receptacle, glabrous disk-akenes, 

 and no pappus. 



L. Douglasii Hook. & Arn. remains an obscure and ambiguous 

 species. It is very briefly described from a specimen collected by 

 Douglas " between the Narrows and the Great Falls of the Colum- 

 bian River ; " and the character " pilis eglandulosis setosa " implies that 

 it agrees with the Oalliglossa section in having no stipitate dark glands, 

 while the rays are said to be " white." Doulit is not removed by the 

 inspection of two or three disk-flowers which I possess from the speci- 

 men in the Hookerian herbarium. The ovary in these is glabrous ; 

 and the pappus consists of rather stouter and flatter awns than in any 

 Madaroglossa., but fringed near the base with scanty long-villous hairs. 

 It remains uncertain, therefore, whether the species belongs to Madaro- 

 glossa or Oalliglossa, more likely to the former, unless the receptacle 

 should prove to be chaffy throughout. 



The tribe HELENioiDEiE, as now constituted, differs from the Jlele- 

 niecB of De Candolle in the exclusion of the Madiece and the inclusion, 

 as sub-tribes, of the Flaveriece and the Tagetinece, the latter embracing 

 the Pectidece. The separation of the Euheleniere and the BcErie<B into 

 equivalent subtribes does not seem to be justified by any clear and 

 tangible differences. The Helenioidece are almost all American. For 

 the Flora of California, in which they are largely represented, the fol- 

 lowing subtribes are adopted: 1. t/(7Mm?'e<s, with regularly imbricated 

 and broad involucral scales ; 2. RiddelUeoi, with persistent rays in 

 the manner of Zinnia (includes Whitneya as well as Riddellia) ; 3. 

 Heleniece with nearly equal scales to the involucre, deciduous rays, 

 and no oil-glands ; 4. Tagetinem, with oil-glands. The Flaveriece are 

 not represented in California. 



Jaumea Pers. The close relationship of Coinogyne Less, with the 

 Buenos-Ayrean Jaumea was suggested in Bot. INIex. Boundary and 

 elsewhere : their union by Bentham is no doubt to be sustained, 

 however it may be as respects Espejoa and Chcethymenia. But the 

 Californian C carnosa is distinguished by something more than 

 " pedunculis brevioribus et capitulis radiatis," as it has also a highly 

 conical receptacle and no pappus. 



Perityle Benth. The pappus, viz., the crown of squamellag, which 

 belongs to all the species of this genus and to no Laphamia, forms the 

 best character for distinguishing these two genera. Mr. Bentham pro- 



