76 Writings of Edward L, Greene. [zoe 



tribe in general aspect, and lacks even the clavate style-branches 

 of this one, these organs being nearly linear and even somewhat 

 compressed, rather than terete and claviform. Although the 

 type of the genus has pentagonal achenia and a coroniform 

 concreted pappus, a newly discovered Californian ally of it 

 displays exactly quadrangular akenes surmounted by distinct 

 and conspicuous pappus paleae and equally distinct bristles 

 alternating with them. This I have published as a genus Biolettia-, 

 and, with authors who, like Bentham and Asa Gray, make much 

 of this kind of character, allowing it to overbalance all con- 

 siderations of agreement in habit, Biolettia will be received in 

 generic' rank. But, as the type is a Trichocoronis vn fades I now 

 prefer to treat it as an aberrant member of that genus, and 

 rename it: 



Trichocoronis riparia. Biolettia riparia, Greene, Pitt, ii 



Mr. Greene should call this kind of thing Comical Notes 

 instead of " Critical Notes." "Biolettia" has been distributed 

 to a considerable extent and any one who has a specimen may 

 see for himself that the style branches are terete and somewhat 

 thickened upward, and that the pappus is exactly what Dr. Gray 

 describes " a minute but evident crown of more or less concreted 

 setuliform squamellse or some of them aristellate." The akenes 

 are always pentagonal though the faces are unequal. Bentham 

 and Hooker say "In specie altera (7! Wrightii) styli rami 

 subteretes et pappus conspicuus, in altera (Z! rivularis) styli 

 rami supra medium complanati et pappi pili minuti."t 



The plant has just the appearance of a small pale Ageratum 

 and the attempt to liken it to Erigeron is an unworthy evasion 

 of the fact. 



It has been compared at Harvard with the type of T. Wrightii 

 and found to be exactly the same. 



Coleosanthus Cass, for Brickellia KH. Although Mr. Greene 

 evidently doubts the suflBciency of the characters separating 

 Brickellia from Kuhnia, he nevertheless supplements Dr. Kuntze 

 by transferring a few additional species. Baillon reduces Brickellia 



* Erythea i, 41. 



t Genera Plantarum i, 241. 



