206 PROCEEDINGS OP THE AMERICAN ACADEMY 



Crocidiuji Hook. The broad and flat branches of the style are 

 decidedly Asterideous, as Mr. Bentham remarks ; and the genus might 

 be better placed there than among the Senecionece, except for the thread- 

 and mucilage-bearing papilliB of the akenes, which are common in 

 Senecio. In this respect, as in the shape of the acheuium, and the broad 

 and flat style-branches, no less than in the involucre and habit, it much 

 resembles another genus of uncertain atfinity, namely, Blennosperma, 

 as was noticed long ago in the Flora of North America. I find that 

 I once inadvertently mistook the latter for Grocidiiim, whence that 

 plant was, in the Botany of the Mexican Boundary, said to have been 

 collected in California. It has not yet been seen south of Oregon. 

 Tlie small cauline leaves, described as " omnia Integra " in the Genera 

 Plantarum, are mostly 3-cleft, as in Hooker's plate. 



Bartlettia Gray cannot be nearly allied to Crocidium, having 

 none of the peculiar characters of that genus. 



PsATHYROTES Gray. The affinity of this genus with the two follow- 

 ing seems to me unmistakable and close. Rather than to distribute 

 them under different tribes, it might be better to take Trichoptilium also 

 into the SenecionecB, accounting the bristles of the pappus to be united 

 at base to form the scales. But technically the latter genus has 

 the character of the Helenioidece. In the yet unpublished Flora of 

 California I have ventured to unite with Psathyrotes, under the 

 name of 



PsATHYROTES (Peucephyllum) Schottii, the Peucephylluyn 

 Schottti Gray in Bot. Mex. Bound, p. 74. I had referred this plant 

 to the EiqKitoriacece, on account of the styles and the im[)ressed- 

 jiunctate leaves, supposing that the flowers were not truly yellow. 

 Bentham recognized an affinity with his Luina, which has the same 

 inappendiculate style. The flowers in other respects are apparently 

 just those of Psathyrotes ; and the style-branches of P. scaposa, al- 

 though somewhat hispid, are equally destitute of any tip. 



LuiNA Benth. Notwithstanding its Inuloid style-branches, this 

 genus is most related to T'etradymia, and indeed might almost be 

 regarded as a section of it. Now that the Ions hairs of the achenium 

 of the latter are known to be inconstant, Luina is distinguished from 

 it only by the total absence of appendage or tip to the style-branches, 

 and the less deeply cleft corolla, the lobes of which are much shorter 

 than the tubular-funnelform throat. The midnerve of the c^roIla-lobes 

 is equally apparent in Luina, and the anthers are soon couqjletely 

 exserted. A form seemingly of the original species {Luina hypoleuca, 

 var. Californica) has been collected on the coast range of California 



