| 
ROBINSON. — SYNOPSIS OF THE GENUS MELAMPODIUM. 465 
+ + + + Leaves rhombic to oblong, narrowed to a sessile auriculate base. 
++ Leaves oblong, relatively narrow. 
= Outer involucral bracts 2, not accrescent, or scarcely so. 
oan 33. M. Brpracreatum, Watson, Proc. Am. Acad. xxvi. 140 (1891). 
Fields, Del Rio, State of Mexico, Pringle, no. 3230. 
= = Outer bracts 4 to 5, obtuse, united at the base into a cup. 
7 34. M. etasrum, Watson. Proc. Am. Acad. xxvi. 139 (1891).— 
Guanajuato in valley near Irapuato, Pringle, no. 2821, and Jalisco near 
La Barca, Pringle, no. 3863. 
++ ++ Leaves broad, mostly — or rhombic: outer involucral bracts 5, con- 
spicuously accrescent. 
= Outer bracts of the involucre “his oblong, acute, distinct nearly or quite to 
the base. 
? 35. M. Lonerrortum, Cerv. ace. to Cav. Anal. Cien. Nat. vi. 303 
(1803). M. rhomboideum, DC. Prodr. v. 520 (1836).—San Luis 
Potosi, Parry & Palmer, no. 444; Valley of Mexico, Bourgeau, no. 
868, Pringle, a no. 6455, Harshberger, n no. 176. 
= Outer bracts of the involucre ovate, obtuse or obtusish, connate toward 
the base. 
cc 36 M. PERFOLIATUM, HBK. Noy. Gen. & Spec. iv. 274 (1820). — 
A common and well-marked weed throughout Mexico, also established 
in S. California at Los Angeles, Parish Brothers. 
Synonyms AND Dovustrut OR ExcLupED SPECIEs. 
M. achiliaeoides, Hemsl. Biol. Cent.-Am. Bot. ii. 145 (1881) = Vil- 
lanova achillaeoides, Less. 
M. australe, Loefl. It. Hisp. 268 (1758) = Acanthospermum brasilum, 
Schrank, acc. to Hook. f. & Jacks. Ind. Kew. ii. 188. 
M. Firiniglastlats Spreng. Syst. iii. 619 (1826) [M. Baranquillae, DC. 
Fe v. 521] = Selerocarpus africanus, Jacq., ace. to DC. Prodr. v. 
“ir Berterianum, Spreng. 1. c. An ‘unrecognized and poorly described 
West Indian plant, very likely not of this genus, 
M. brachyglossum, J. fee Smith, Bot. Gaz. xiii. 74 (1888) = Jaegeria 
hirta, Less. 
H ie Copiosum, Klatt in hak Jahrb. viii. 41 (1887) = M. paludosum, 
K. 
M. coronopifolium, Sch. Bip. in Hemsl. 1. c. = M. hispidum, HBK. 
M. digynum, Benth. & Hook. f. Gen. ii. 349 (1873), ace. to Hook. f. 
& Jacks. 1. ¢. = M. camphoratum, Benth. & Hook. f. 
M. divaricatum, DC.1. ¢. = M. paludosum, HBK. 
VOL. XXXVI. — 
