272 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 glauduloso-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. — Arjeratum 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. Seemanni, Gray, 1. 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) cm. longis adscendentibus 1-6 (rarius 

 15)-capitatis ; squaniis involucri subcylindrici vel anguste campanulati 

 viridibus striatis, exterioribus brevibus plus minusve griseo-puberulis 

 capitulis ca. 13-floris. — A. microphylla, var. Palmeri, Gray, 1. c. — 

 Rio Blanco, Jalisco, Mexico, Palmer, no. 537 (type, in hb. Gr.) ; on dry 

 porphyritic hills near Guadalajara, Pr ingle, 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, Robinson & Greenjian, 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 Eupatorieae regarded as a 

 genus by Mociiio, as a subgenus of Phania by De Candolle, Prod. v. 115 

 (1836), as aberrant species of Ageratum by Bentham and Hooker f., 1. c, 

 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, 



