173 PROCEEDINGS OF THE AMERICAN ACADEMY 



of 3 lines or more in width, which splits into two in dehiscence. Seeds 

 superposed in a single series, puberulent. 



Of BombacefE, Bjttneriacea?, TiliaceiE, &c., thei*e is Eriodendron 

 anfractuosum, DC. (361) ; and specimens with male flowers of a tree 

 apparently allied to Myrodia (373) ; Melochia pyramidata, L. (269) ; 

 the ever-recurring Waltheria Americana, L. (356) ; Guazuma tomen- 

 tosa, Kth. (131) ; Triumfetta semitriloha, L. (145) ; a form of Helio- 

 carpus Americana, L. (225) ; and Corchorus pilolobus, Link '(the C. 

 siliquosus of Torrey and Gray's Flora, &c.), mixed with G. siliquo- 

 sus, L. and C. villosissimtcs, St. Hil. (196, 197). 



Amoreuxia Wrightii, Gray, PI. Wright, 2, p. 26 occurs in a single 

 specimen (124). 



Oxalis corniculata, L. (347) could hardly fail to be present. 



Vitis Carihcea, DC. (120, 376), Gouania Domingensis, L. (279), 

 and a dubious, perhaps unpublished Euonymus (139), arc solitary rep- 

 resentatives of their respective orders. 



The Malpighiacens are represented by Galjyhimia glcmca, Cav. (130, 

 233), Malpighia glabra, L. (183), a Stigmaphyllon allied to S. pube- 

 rum (323), and a variety or near relation of Heteropteris cotinifolia, 

 Juss. (209).* 



Spondias lutea, L. (353), Bursera giwimifera, Jacq. (344), and Idea 

 Copal, Rich. (185) represent the Terebinthacea; ; and Rourea glabra, 

 H. B. K. (171), the Connaraceai. 



The Legurainosas are Orotalaria sagittalis, L. (30), C. incana, L. 

 (33, 295), a anagyroides, H. B. K. (26) ; and C. striata, DC. (22) ; 

 Indigofera suhulata, Vahl (20, 27) ; Eysenhardtia amorplioides, H. B. K. 

 (15, 230) ; Dalea nigra. Mart. & Gal., which is Bentliam's D. lasio- 

 stachya and D. elegans of Scemann (7), and the following apparently 

 undescribed species, which abounds in Berlandier's collection : — 



* I append characters of a Mexican Maple, specimens of which were distributed 

 among Berlandier's reliqum. It is the only Mexican species known to me, and be- 

 longs to the same group with A. saccharinum. 



Acer Mexicanum (sp.nov.): glabratum ; foliis subtus pallidis dilatato-cuneatis alte 

 trilobis basi tnmcatis vel subquinquelobis basi magis rotundatis, lobis parce repando- 

 sinuatis margine integerrimis ; floribus umbellato-corymbosis simul cum foliis evo- 

 lutis polygamis ; pedicellis filiformibus barbatis ; calyce campanulato subdentato 

 (petalis nuUis ?) ; staminibusS; fructibus mox glabris, alis parvulis semi-obovatis 

 basi angustatis arrectis. — "Nuevo Leon, in ruderatis, Junio, 1843," Berlandier, 

 coll. no. 3122. Leaves 2 inches in diameter. Wings of the fruit 8 or 9 lines long, 

 but probably not full grown. 



