NEW ASTEEACEOUS GEKERA. 173 



C. F. Baker's n. 3405, collected by Mr. Brandegee San Diego, 

 went out into distribution under the above name. I now think 

 the plant must be a hybrid between an Isocoma and a Corethrogyne. 

 In habit it is like the latter, also as to the pappus in all but its 

 color, while the corollas are those of fsocoma. 



New Asteraceous Qenera. 



In the journal entitled Betthea, established by me at the 

 University of California thirteen years ago, I began but did not 

 iinish the work of breaking up into natural genera the Aplopappus 

 of Bentham as maintained by Gray for North American species. 

 There were then under consideration two specific types which I 

 could relegate to none of the genera that had been so well 

 founded by pre-Benthamian synantherologists. These I wish 

 here to offer as representing good genera not hitherto recognized ; 

 and first, 



TUMIONBLLA MONACTIS. Aplopappus monactis. Gray, the 

 nearest affinity of which I conceive to be Acamptopappus, of 

 which it has in a way the involucres, corollas, achenes and the 

 pappus, at least as to its permanent whiteness, while in habit 

 and inflorescence it may be considered nearer several other groups 

 of asteraceous shrubs inhabiting western deserts. The plant is 

 very common upon a somewhat limited area of the Southwest, 

 and good specimens abound in the herbaria ; something that 

 cannot be said of the following. 



Hespeeodoeia scopuloeum, Bigelovia Menziesii, var. scop- 

 ulorutn, Jones, Proc. Calif. Acad. 3 Ser. v. 693, where it is 

 described by Mr. Jones, who however failed to apprehend its 

 real affinities. It is next of kin to my genus Petradoria, i. e. 

 Nuttall's Solidago pumila, of which it has the foliage and some- 

 thing of the habit, but with very different inflorescence, involu- 

 cre, corolla and achenes. 



Along with this I place tentatively a type which remained in 

 Aplopappus as I left it, that is 



