lOG Mr. Brown's Ohservationa on the 



Cook's second voyage, and now in the library of Sir Joseph Banks, 

 there is a figure of this plant, from which it appears that he origi- 

 nally referred it to Stcehelina; a proof that he had not at that time 

 very carefully examined it. It is not improbable therefore that he 

 afterwards proposed it as a distinct genus, belonging to Polygamia 

 segregata, from finding that this had been already done by Solan- 

 der, whose name {Cartodium), however, he did not think it neces- 

 sary to adopt, and with whose generic character he probably was 

 not acquainted. In his own he very erroneously states that there 

 is no partial involucrum, and hence perhaps M. Labillardiere 

 entirely overlooked Crospec^ia when he established his Richea fvoxn 

 a nearly related species of the same genus. That such is the case 

 I have long since briefly noticed*, and have ascertained by a 

 comparison of the specimen of Cra.ipedia uniftora in George 

 Forster's Herbarium with Richea glaiica of Labillardiere, and 

 other species of the same genus which I have observed in New 

 Holland. 



M. Labillardiere's character of Richea is essentially correct. 

 It is well to remark, ho^i^ever, that his general involucrum 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 Richea in the want of these brac- 

 teae, as well as in the partial receptacles being without palca;, and 

 in the rays of the pappus being plumose only in the upper part. 

 I have also another genus of this tv'ihe {Leiicophyta) from the same 

 country, differing from Calocephalus in having a general involu- 

 crum consisting of a few short bractefe, in the squamee of its par- 

 tial involucra being concave and bearded at top, and in the rays 



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



of 



