228 PITTONIA. 



ciliate with hirsute hairs: branches, peduncles and involucre 

 glauduhir-pubesceut; heads 3 or 4 lines high, on slender 

 peduncles of 1 inch long, nodding both before and after 

 flowering: involucre campanulate: rays 5 to 7, yellow, 2 Hues 

 long, deeply 3-cleft: achenes black, hispidulous; pappus 

 longer than the achene, of about ten unequal linear-lanceo- 

 late acuminate white palese, their margins barbellate. 



Mountains of Sonoma Co., California, May 15, 1892, col- 

 lected by Mr. Bioletti. Seen also by the writer, about a 

 month earlier, on the flanks of Mt. St. Helena; the plants not 

 then in flower. The species is a very remarkable one, on 

 account of the nodding heads. Its nearest relative is perhaps 



C. Jonesii, i. e. Layia Joncsil, Gray. Callichroa is the old- 

 est and therefore the only admissable generic name for those 

 plants which, in our books, are called Luijla. 



PsACALiUM STRICTUM. Prenaullies sfrichi, Greene, Pitt 

 ii. 21 (1S89). Luina Piperi, Robinson, Bot. Gaz. xvi. 43, t. 6 

 (1891). My specimens of this rather arabigious plant were 

 long past flowering, and in mature fruit, when I collected 

 them. The whole aspect of the herb was that of a Cicho- 

 riacea; and, I should say that, in gathering it I encountered 

 the milky juice characteristic of that family of composites. 

 Huwever, since the corollas are not ligulate— and the few 

 withered remains of them in my specimens, when once exam- 

 ined, show that— I can not, after the lapse of nearly three 

 years, assert positively that the herb is milky. Assuming, 

 then, that it is a plant with watery juice, it must b? allied to 

 Senecio.^ I believe it is a good congener of Cassiuis' type of 

 Psacalium, to which also Luina itself, as to the typical spe- 

 cies, may or may not be logically reducible. Certain, how- 

 ever, it is, that the present species differs widely from true 

 Luina in habit. The figure given in the Botanical Gazette 

 was confessedly very unsatisfactory, having been drawn from 

 a mere inflorescence which Mr. Piper had broken off and put 

 m his pocket. The present writer, obtaining his plants from 

 precisely the locality afterwards explored bv Mr. Piper, made 



