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 palez and equally distinct bristles 
alternating with them. ‘This I have published as a genus Polettia; 
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, Azolettza will be received in 
generic rank. But, as the type is a 7richocoronis in facies 1 now 
prefer to treat it as an aberrant member of that genus, and 
rename it: 
TRICHOCORONIS RIPARIA. Biolettia riparia, Greene, Pitt. ii 
£16.'°* 
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 squamellce 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 (TZ. rivularis) styli 
rami supra medium complanati et pappi pili minuti.’’+ 
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 7. Wrightiz 
and found to be exactly the same. : 
Coleosanthus Cass. for Brickellia Ell. Although Mr. Greene 
evidently doubts the sufficiency of the characters separating 
Brickellia from Kuhnia, he nevertheless supplements Dr. Kuntze 
by transferring a few additional species. Baillon reduces Brickellia 
* Erythea i, 41. 
{ Genera Plantarum i, 241. 
