122 PROCEEDINGS OF THE AMERICAN ACADEMY 



Aplopappus MacRuEAnus, will be a proper name for Pyrrocoma 

 {Chromochceta) angustifoliaj DC, P. Macrceana, Remy in Gay. Fl. 

 Chil. ?), in honor of one of its discoverers. 



Aplopappus parvifolius {Pyrrocoma parvifoUa, DC), although 

 nearly related to the last, is known by its smaller leaves and heads, and 

 thinner, acutish scales of the involucre. The genus Pyrrocoma cannot 

 be sustained upon the rayless heads, as De Candolle and Remy would 

 have it ; for intimately related, and even identical species are both ra- 

 diate and rayless in different specimens, and the original Pyrrocoma 

 has rays, as was long ago shown ; the shape and the smoothness of the 

 achenia also fail as chixracters ; the form of the involucral scales offers 

 no definite distinction, and the color of the pappus is of no account. 

 That of -4. Macrceanus varies from deeply rufous to fulvous. A.'} (Pyr- 

 rochceta) Hcenkei, DC, is Corethrogyne Jilagini'folia, and was doubtless 

 collected in California. 



Nardophyllum revolutum, DC. To this belongs Dolichogyne 

 stcehelinoides and D. gnaphalioides, DC. {D. Candollei, Remy). Con- 

 trary to Weddell's opinion, it seems clear that Remy's second thought 

 (in Ann. Sci. Nat. ser. 3, 1*2, p. 184) was best, when he approximated 

 Dolichogyne DC. to Dr. Hooker's section of Chiliotrichum, his genus, 

 Anacliuia. The wonder is that he did not combine such evident con- 

 geners. Dolichogyne, however, is antedated by Nardophyllum, Hook. 

 & Am. Here it is again remarkable that De Candolle, who had 

 established the latter genus upon Hooker and Arnott's data, did not 

 suspect its identity with his subsequent Dolichogyne, probably because 

 he had ascribed to the former " anthenu basi bisetosa3 " and " pappus 

 plumosus." The anthers, like the corolla, are strictly Asterineous, and 

 the bristles of the pappus moderately barbellate along their thicker 

 upper part, not '• plumose," as Hooker and Arnott write in their ge- 

 neric chai'acter, and hardly " subplumose " as they give it under the 

 species. As to Weddell's extension o^ Dolichogyne to include (in his 

 section Tola) three species with heterogamous flowers, the pistillate 

 ones incipiently ligulate, I remark that the adoption of this view would 

 merge the whole in a still older genus, LepidophyUum, Cass., which 

 differs only in having the ligules a little more developed (yet often bila- 

 biate or irregularly cleft), and the pappus of stouter bristles. The 

 leaves of LepidophyUum cupressiforme are indeed opposite ; but both 

 opposite and alternate leaves occur in the nearly allied South African 

 genus Pteronia ; and the difference between L. cupressiforme and L. 



