ROBINSON. — ON CERTAIN COMPOSITAE. 213 



110. 9833 herb. nat. Cost. (= no. 7068 distrib. J. D. Srn.). This plant 

 is clearly distinct from V. nicaraguensis Benth., which has 8-10-rayed 

 heads, widely winged achenes, and a different leaf-contour. 



Verbesina gigantoides, sp. no v., robusta alta ; caule crasso ter- 

 etiusculo purpurascenti glaberrimo plus minusve pruinoso intus cum 

 medulla alba constipato ; foliis alternis pinnatifidis longe petiolatis 

 firmiusculis supra glaberrimis lucidulis plus minusve ruguloso-bullatis 

 subtus olivaceis molliter pubescentibus 2-3 dm. longis 1-2.5 dm. 

 latis, rhachi alata ca. 2 cm. lata, lobis ca. 11 lanceolatis caudato-atten- 

 uatis saepe falcatis integerrimis vel obscure undulatis 8-15 cm. longis 

 2.5-4 cm. latis, infimis reflexis; sinubus rotundatis; petiolo tereti- 

 usculo purpurascenti glaberrimo omnino exalato ; panicula ampla valde 

 convexa pubescenti ; bracteolis lineari-filiformibus ; pedicellis 3-6 mm. 

 longis ; capitulis numerosissimis 5 mm. diametro 7 mm. altis ca. 20- 

 floris ; involucri squamis obovato- vel oblanceolato-oblongis abrupte 

 acutiusculis margine ciliata excepta glabriusculis ; flosculis liguliferis 

 ca. 4-5 pistilliferis ; ligulis albis oblongis 3.5 mm. longis apice leviter 

 3-dentatis ; flosculis disci ca. 15, corolla albida subcylindrica, tubo 

 pubescenti, limbi dentibus 5 oblongo-lanceolatis ; antheris linearibus 

 nigrescentibus vix connatis ; achaeniis 3.5 mm. longis pyriformibus 

 auguste alatis deorsum valde attenuatis, alis ciliato-laceris, pappi aristis 

 2 subaequalibus ca. 2 mm. longis. — V. gigantea Robinson & Green- 

 man, Proc. Am. Acad, xxxiv. 561 (1899), in part, not Jacq. — From 

 near Yajalon, Chiapas, Mexico, 21 November, 1895, E. W. Nelson, no. 

 3423 (type, in Gray Herb.). This is one of several habitally similar 

 plants, which have been in a preliminary way referred to V. gigantea 

 Jacq. Happily, through the careful definition and segregation of the 

 West Indian species by Prof. Urban, Symb. Ant. v. 264-265 (1907), it 

 has become possible to interpret more definitely the continental forms 

 of this group. 



Verbesina leucactinota, sp. nov., perennis verisimiliter herbacea 

 robusta alta griseo-tomentella ; caule subtereti leviter striate exalato ; 

 foliis alternis pinnatifidis supra viridibus scabriusculo-puberulis subtus 

 molliter griseo-tomentellis 2 dm. vel ultra longitudine 1.3 dm. latis 

 saepius 9-lobis ; lobis lanceolatis 4-7 cm. longis attenuatis 1..3-2.3 cm. 

 latis, sinubus rotundatis ; petiolo late bialato basicum auriculis magnis 

 amplexicauli sed alis in caule non decurrentibus ; inflorescentia panicu- 

 lata magna valde convexa ; bracteis foliaceis anguste lanceolato-ob- 

 longis acutis integris 4-8 cm. longis ca. 1 cm. latis basi biauriculatis ; 

 capitulis ca. 27-floris conspicue radiatis ; flosculis liguliferis ca. 5 ; li- 

 gulis ellipticis albis breviter apice 3-dentatis 4 mm. longis ; corollis 

 disci albidis 3 mm. longis ; antheris nigrescentibus conspicue exsertis ; 



