144 BOTANY OE THE VOYAGE OF H.M.S. IIEH.^iD. 
I have seen many specimens of tliis plant from different localities, viz., Britlsli Guiana (Rich. Scliom- 
burgk), Cayenne (Martin), Bahia (Sellow), Eio Janeiro (Graudicliaud, Sellow), Peru (Poeppig), Portorico 
(Wydlcr), Hayti (Ehrenberg), Martinic^ue (Sicber, no. 192), etc. It is most variable in size as -well as in 
colour and the degree of the pubescence, and even the number of flowers in the flo-^cr-heads. In the spe- 
cimens irom Pallia, Peru, and Portorico the pubescence of the stem, peduncles, and lower surface of the 
leaves is very dense and almost ferrugineous. In Dr. Seemann's plant and other specimens the pubescence 
is very sliglit, and somevrhat greyish -green. The capitula are not always thirty-flowered, as stated by De Can- 
dolle; I found often fifty flowers in the involucre,* and Kunth observed the same in Humboldt's specimens 
(cf. H. B. E. Nov. Gen. et Sp. tom. 4. p. 108). 
554. Brickellia diffusa, Asa Gray in Plantse Wrightianee, torn. 1. p. 86. no. 32. — Eupaiorium 
diffumm, Vahl, Dc Cand. Prodr. torn. 5. p. 174. no. %\G .—BulbosUjUs diffusa, Be Cand. Prodr- 
tom. 7. p. 2G8. no. 13. In "Nvoods of Veraguas. 
The leaves of this plant much resemble those of ^wjyatorhim pamcidahm, Scbrad., but the plant is 
easily distinguished by the different habit, and by the striking characters of the genus. The achasnia are 
not glabrous, as stated by De Candolle, 1. c. in Prodr. tom. 7, but covered all over with appressed greyish 
hairs, even in Berlaudier's original specimen, no. 2144. 
555. Critonia Pseudo-DaJea, Dc Cand. Prodr. tom. 5. p. 140. no. 2.—Eiipatorium Dalea, 
H. B. K. Nov. Gen. et Sp. tom. 4. p. lOG. no. 3 (uon Linn, non Swartz nee Jacqu.). Volcano of 
Chiriquij Vera^as. 
A much stouter plant than Critonia Dalea of De Cand., with leaves of greater size and a firm coriaceous 
texture, whose panicle is more blunt and much more crowded. In Dr. Seemann's specimen the leaves are 
5-7 inches long, Ig-lf inch broad, and the capitula always five-flowered. 
556. EuPATORiTjM (Cylindrocephala) comjzoides, Vahl, De Cand. Prodr. tom. 5. p. 143. no. 14. 
Var. f/labrescem, Steetz ; foliis late ovatis subtriangularibusj basi cuneata et apice valde acumi- 
nato integerrimisj medio parce obtusec[ue dentatis utrinque glabriusculis, capitulis augustisj 11-14- 
floris. Savanas about Panama, 
Our variety has a very peculiar habit ; but having compared many specimens from difierent localities, 
I am convinced that it is a mere variety of E. conyzoides, Vahl, a most variable species. Even in the same 
specimen the leaves are of a very difierent shape : many of them in our variety are ahuost acute triangular, 
ly- 2 inches long and broad ; others are rounded at the cuneate base, and not broader than an inch, with the 
length of 2 inches ; but the base of all their forms is somewhat cuneiform, entire and suddenly attenuated 
in the petiole, their point very acuminate. They are almost glabrous on both sides, but dotted beneath 
with numerous little glands, and scarcely and obtusely toothed in their middle, or at all entire. I have seen 
specimens from British Guiana (Eich. Schomburgk), Cartagena (Billberg), Caracas (Morltz), Puerto 
Cabello (Karsten, Otto), Mexico (Ehrenberg), Papantla (Schiede), Cuba (Otto), etc. In most of them 
the leaves are narrower, from lanceolate to ovate, and are so gradually passing over in our variety, that I 
cannot find a strict difference ; they arc in general pubescent beneath, but also in a more or less degree, 
and with the serratures more numerous and more acutish. The number of flowers in the flower-heads 
vary from eleven to thirty in each, and the scales of the involucre are always obtuse, by which this species 
ia well and easily distinguished from Eupatorium odoratwm, Linn., the scales of which being acutish, and 
even acuminate, chiefly the innermost ones. E. odoratum moreover rarely occurs in Columbia (Karsten), 
but commonly in most of the West Indian Islands. 
557. EuPATORirM (Cylindrocephala) l<evi(jahim, Lam. Encyclop. tom. 2. p. 408. — 11. B, K. Nov. 
