ROBINSON, — SYNOPSIS OF THE GENUS MELAMPODIUM. 409 
M. cinereum, DC. However, it differs conspicuously in its more entire 
erect or ascending thickish leaves, its much larger heads (nearly or quite 
twice as broad) and its long thickish, firm, persistent, and veiny rays. 
It isa much commoner and more widely distributed plant than JZ cine- 
reum, and may be conveniently regarded as a specific type. 
* * Lower surface of me voi silky-villous, re Selsey more or less floccu- 
and tending to be 
+ Ligules shorter than or "out equalling the PRONE: bracts : heads sessile 
short-peduncled. 
7 9. M. sERricEum, Lag. File tipped by a slender recurved append- 
age. — *¢ Elench. Hort. Madr. 1805,” Gen. et Spec. Nov. 32 (1816); DC. 
Prodr. v. 518; not HBK. — Mexico, Mendez; Oaxaca, Pringle, no. 
6728 ; Darengh, Rose, no. 8476; Jalisco, Rose, nos. 2819, 3561; Espe- 
ranza, Dugés. 
~ Var. exappendiculatum. Hood destitute of a mucro or appendage, 
sometimes itself obsolete. — In mountains near Morales, San Luis Potosi, 
Schaffner, no. 271 in part; base of Iron Mountain, Durango, Dr. £. 
Palmer, no. 926 (coll. of 1896); Guanajuato, Prof. A. Dugts, Pringle, 
no. 5309; Federal District, Pringle, no. 7978 (form approaching J. 
hispidum, HBK). 
+ + Ligules conspicuous, usually much exceeding the fructiferous bracts : pedun- 
cles long and slender. 
++ Leaves (at least in part) pinnatifid ; segments rather broad. 
10. M. americanum, L. Spee. ii. 921 (1753); Rel. Houst. 9, t. 21; 
DC, Prodr. v. 518, — Vera Cruz, Mexico, Houston. With this clearly 
figured plant from Vera Cruz I have been unable to match any speci- 
mens from Southeastern Mexico. However, the following specimens 
from the western coast probably belong here: Manzanillo, Xantus, and 
Colima, Palmer, no. 136 (coll. of 1897), and no. 1172 (coll. of 1891). 
++ ++ Leaves, at least in part, deeply cleft, segments narrow, linear. 
= Outer bracts of the involucre fia Sassy by a thin yellow somewhat 
i 
7 VW. M. tiygarrtosum, DC. Prodr. v. 518 (1836). ML sericeum, 
_ Benth. in Oerst. Vidensk. Meddel. 1852, p. 86, not Lag.—A well-marked 
species represented by the following specimens : Oaxaca, Nelson, nos. 2809, 
2339 (pathological) ; Chiapas, Nelson, no. 2949; Guerrero, hills near 
— Pringle, no. 9162 ; Nicaragua, Oersted ; Sinaloa, Rose, no. 3183. 
= Outer bracts of the involucre not ee -margined or colored, 
herbaceous to the acumin 
12. M. longipes. JZ sericewm, var. longipes, Gray, Proc. Am. Acad. 
_ Xxii. 423 (1887).— Erect, 4 to 5 din. high, widely branched: upper and 
