22 PROCEEDINGS OF THE AMERICAN ACADEMY. 
in pedunculos gracillimos ca. 6 cm. longos laxe spicato-pluricapitatos 
productis ; foliis subsessilibus oppositis late ovatis vel ovato-rhomboideis 
crenato-serratis obtusiusculis 6-10 mm. longis 4-7 mm. latis utrinque © 
puberulis et glanduloso-atomiferis ; pedicellis ad 3 mm. longis ; involucri 
anguste campanulati squamis viridibus vel brunnescentibus dorso pu- 
berulis, exterioribus acutis, interioribus obtusiusculis vel apice rotundatis ; 
capitulis ca. 17-floris. — Ageratum microphyllum, Sch. Bip. in Seemann, 
Bot. Herald, 298 (1856). Decachaeta Seemanni, Benth. & Hook. f, 
Gen. ii. 239 (1873). D. Seemannii, Hemsl. Biol. Cent.-Am. Bot. ii. 
78, t. 42 (1880). Ageratella microphylla, var. Seemannt, Gray, |. c. — 
Northwestern Mexico, Seemann, no. 2043 (co-type, in hb. Gr.). 
A. Palmeri, n.sp. Suffruticosa erecta; caulibus saepius plurimis 5-6 
dm. altis teretibus pilis brevissimis crispis griseo-puberulis foliosis; foliis 
alternis lanceolatis vel lineari-oblongis obtusiusculis vel apice rotundatis 
inciso-serratis vel integris 1-3-nerviis 12-20 mm. longis griseo-puberulis 
et obscure atomiferis; inflorescentia elongata angusta folioso-bracteata, 
ramulis gracilibus ad 4 (rarius 10) em. longis adscendentibus 1-6 (rarius 
15)-capitatis; squamis involucri subcylindrici vel anguste campanulati 
viridibus striatis, exterioribus brevibus plus minusve griseo-puberulis 
capitulis ca. 13-floris. — A. microphylla, var. Palmeri, Gray, 1.-¢. == 
Rio Blanco, Jaliseo, Mexico, Palmer, no. 537 (type, in hb. Gr.); on dry 
porphyritic hills near Guadalajara, Pringle, no. 1815; Sierra de San 
Esteban, Pringle, nos. 9840, 11,480. This species is readily distin- 
guished from the other by its narrow alternate leaves and different 
inflorescence. 
Oxylobus adscendens, Rosinson & GreENMAN, n.comb. Agera- 
tum adscendens, Sch. Bip. ex Benth. & Hook. f. Gen. ii. 242 (1873), 
nomen subnudum; Hemsl. Biol. Cent.-Am. Bot. ii. 80 (1881), where 
first described; Klatt, Leopoldina, xx. 75 (1884). This species, both 
from habit and technical characters, should be placed in Oxylobus, Moc, 
a marked group of three or four ageratoid Hupatorieae regarded as @ 
genus by Mocifio, as a subgenus of Phania by De Candolle, Prod. v. 115 _ 
(1836), as aberrant species of Ageratum by Bentham and Hooker f., 1. ¢; 
but restored to generic rank by Dr. Gray, Proc. Am. Acad. xv. 25-26 
(1879), who, however, failed to include the species here mentioned. 
Dr. Gray’s two binomials, O. arbutifolius and O. glanduliferus, appear 
to have been entirely overlooked by the compilers of the Index Kewen- 
sis. In this connection it may be worth while to call attention to a prob- 
able error by which Mr. Hemsley (Biol. Cent.-Am. Bot. ii. 82) extends 
the range of the latter of these two species to “ Venezuela, &c., Fendler, 
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