466 PROCEEDINGS OF THE AMERICAN ACADEMY. 



M. Domheyanum, DC. 1. c. 521, is a still doubtful species from Peru. 



M. Hildalgoa, DC. 1. c. == HildaUjoa ternata, Llav. &> Lex. 



M. hirsutum, Benth. & Hook. f. 1. c. ace. to Hook. f. & Jacks. 1. c. 

 = M. camphoratum, Benth. & Hook. f. 



M. humile, Sw. Prodr. Veg. lud. Occ. 114 {17 SS) = Acanthosper mum 

 /nc/nile, DC. 



3r. lanceolahim, DC. Prodr. v. 519 (1836) = M. diffusum, var. 

 lanceolatum. 



31. Liebinannii, Sch. Bip. in Klatt, Leopoldina, xxiii. 89 (1887) = 

 M. montanum, Benth. 



M. longifolium, Brouss. ex Willd. Euum. Hort. Berol. 934 (1809) = 

 (?) M. longifolium, Cerv. 



M. manillense, Less. Linnaea, vi. 155, t. 2 (1831) = M. diffusum, Cass. 



31. ovatifoliiim, Reicheub. Ic. Exot. t. 42 (1827) = 31. paludosum, 

 HBK. 



31. panamense, Klatt, 1. c. 42 = 3f. paludosum, HBK. 



3[. pumilum, Benth. PI. Hartw. 64 (1840) = starved 3f. paludosum, 

 HBK. 



31. ramosissimum, DC. Prodr. v. 518 (1836) = 3f. cinereum, var. 

 ramosissimum. Gray. 



31. rhomhoideum, DC. 1. c. 520 (1836) = 31. longifolium, Cerv. 



31. ruderale, Sw. Fl. Ind. Occ. iii. 1372 (1806) = EUutheranthera 

 ovata, Poit., ace. to Hook. f. & Jacks. 1. c. 



31. sericeum, Benth. in Oerst. Vidensk. Meddel. 1852, p. 86, not 

 Lag. = ikf. Imearilobum, DC. 



3f. sericeum, var. hrevipes, Gray, Proc. Am. Acad. xsii. 423 (1887) 

 = typical M. se7'iceum, Lag. 



31. sericeum, var. longipes, Gray, Proc. Am. Acad. xxii. 423 (1887) 

 = 31. longipes, Robinson. 



31. ternatum, DC. ace. to Hook. f. & Jacks. lud. Kew. ii. 188, = 

 Hidalgoa ternata, Llav. & Lex. 



It must be frankly confessed that among the species here kept up the 

 following are to the writer still doubtful : — 



31. americanum, L., which, although the type of the genus, cannot be 

 matched by any specimen from near the original station. 



31. microcephalum, Less. Not as yet satisfactorily represented in the 

 herbaria examined. 



31. paludicola, Taub., the description of which suggests a Sclerocarpus. 



M. paniculatum, Gardn., which from descrijDtion is not clearly sepa- 

 rable from 31. oblong i folium, DC. 



