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 286 OBSERVATIONS ON THE NATURAL FAMILY

Polygamia segregata, from finding that this had been already done by Solander, whose name {Cartodium), how- ever, he did not think it necessary to adopt, and with whose generic character he probably was not acquainted. In his own he very erroneously states that there is no par- tial involucrum, and hence perhaps M. Labillardiere entirely overlooked Craspedia when he established his Bichea from a nearly related species of the same genus. That such is the case I have long since briefly noticed, 1 and have ascer- tained by a comparison of the specimen of Craspedia nniflora in George Forster's Herbarium with Bichea glauca of Labillardiere, and other species of the same genus which I have observed in New Holland.

M. Labillardiere's character of Bichea is essentially cor- rect. Tt is w T ell to remark, however, that his general invo- lucrum is formed of the bracteae subtending and in equal number with the outer partial capitula; and that the general receptacle has no other paleae than the analogous bracteae of the inner capitula. It is the more necessary to take this view of the structure, as I have found in New Holland a nearly related genus (Calocephalus), which differs from Craspedia and Bichea in the want of these bracteae, as w r ell as in the partial receptacles being without paleae, and in the rays of the pappus being plumose only in the upper part. I have also another genus of this tribe (Leu- cophyta) from the same country, differing from Calo- cephalus in having a general involucrum consisting of a few short bracteae, in the squamae of its partial involucra being 107] concave and bearded at top, and in the rays of its pappus being plumose through their wdiole length, as in Craspedia, from which it is distinguished by the want of paleae on the partial receptacles, and very remarkably in habit.

I have selected the foregoing genera as having been either published under different names, or, as it appears to me, unnecessarily subdivided. In this extensive class it

1 In Prodr. Flor. Nov. Holl. p. 555.

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