ioo The Botanical Gazette. [April, 



acute involucral bracts, merely 3-angled ray achenes, and 

 broadly-winged disk achenes. Much more nearly related to 

 Z. trachylepis HemsL, but differs in its longer-pedunculate 

 heads, acute involucral bracts, very acute or acuminate 

 ("rounded at apex' ' in Z. trachylepis) chaff and unequal awns. 



TlTHOM \ TUB.KFokMis Lass. — Specimens collected at 

 Pacaya, Depart. Amatitlan {J. D. S. 2390), show a peculiar 

 habit. All the specimens in the Gray Herbarium are tall 

 branching plants, while many of these are low and widely 

 divaricate-branched at the very base. 



MELANTHEKA HASTATA Rich. — It is evident that this 



species must include M. oxylcpsis DC, as in specimens from 

 Pinuia and Rio Amatitlan (J. D. S. 2342 and 2341 ) there are 

 all gradations in the leaves from ovate-deltoid (M. oxylcpds) 

 to hastately 3-Iobed (M. has tat a). 



ENCELIA Mexicaxa Mart.— This variable species was col- 



(7 



<r 



it with specimens in the Gray Herbarium it seems evident 

 enough that it should be considered to include E. subaristata 



Gray, E. heterophylla HemsL, E.fcetida HemsL, and E. cordata 



HemsL, as indicated by Dr. Gray in an herbarium note. 



SPILANTHES REPENS Michx. has been heretofore reported 

 only from the southern United States. It now comes from 

 Coban, Depart. Alta Verapaz, alt. 4300 feet {J. D. S. 1014). 



SPILANTHES BECCABUNGA DC. — Specimens from Duenas, 

 Depart. Zacatepequez, alt. 5000 feet {J. D. S. 2125) show 

 that the achenes are often pubescent. 



BlDENS hktkrospkrma Gray.— Specimens from Guate- 

 mala, Depart. Guatemala, alt. 50(H) f ee t {J. D. S. 2351), show 

 that the achenes are not always glabrous. 



Bidens Aiitiinieiisis n. sp.— § Psilocari-.ka. Closely re- 

 sembling B. Icucantlia Willd. but the rays (mostly present) 

 narrowly oblong, acute, bright yellow (8 to 12 mm. long), 

 and the 2 I rarely 3) rigid awns perfectly smooth and widely 

 divaricate : exceedingly variable in pubescence, from glabrous 

 to pilose-pubescent. — Antigua, Depart. Zacatepequez, alt. 

 5000 feet, April. 1890 (J. I). S. 2354); San Luis, Depart. 

 Escuintla, March, ISlXi (;7. /). S. 2375,. 



Seneeio Doniicll-Xmithii n. sp.— A very stout woolly- 

 pubescent perennial : leaves alternate, thick, very broadly 

 ovate to rotund in outline, cordate at base, undulately lobed 

 and margined with blackish mucronulations, glabrous above, 



