256 FIELD COLUMBIAN MUSEUM BOTANY, VOL. II. 



somewhat irregularly dentate: other characters as in the species. 

 MEXICO. State of Yucatan : Chichankanab, Dr. Geo. F. Gaumer, 

 nos. 1512, 1430 in part (hb. Field Mus.). 



Some of the specimens above cited have been hitherto doubt- 

 fully referred to Dalechampia denticulata Wright of the West 

 Indies. From this species, however, D. Schottii differs in having 

 uniformly smaller leaves, shorter petioles, smaller floral bracts and 

 a nondilated stigma. Moreover, in D. denticulata the leaves 

 and floral bracts are distinctly cordate, while in D. Schottii 

 the leaves are from obtuse to subcordate at the base and the 

 floral bracts are narrowed below to an obtuse base. The variety 

 trifoliolata suggests D. triphylla, var. mexicana Mull. Arg., but 

 the latter has petioles very much longer in proportion to the 

 length of the leaf-blade. 



Jatropha Gaumeri Greenman sp. nov. 



Tree, 5 to 10 m. high, much-branched: trunk 2 to 5 dm. in 

 diameter; branches and branchlets thick and somewhat fleshy: 

 leaves alternate, petiolate, palmately y-nerved, broadly ovate, 

 5 to 1 8 cm. long, 4.5 to 15 cm. broad, abruptly caudate-acumi- 

 nate, acute, entire, or occasionally subdenticulate in the lower 

 portion, rarely sublobate, deeply cordate to subtruncate at the 

 base, membranous, glabrous above, tawny-pubescent along the 

 veins at the base of the blade beneath, otherwise glabrous; 

 petioles 2.5 to 13 cm. long, glabrous except near the blade: 

 inflorescence in terminal or axillary short-pedunculate com- 

 pound cymes, 2.5 cm. or less in length, glabrous or with a few 

 tawny hairs in the axils of the deltoid or triangular-ovate acute 

 glabrous bracts ; peduncles i cm. or less in length : flowers sessile, 

 monoecious, whitish or cream-colored: calyx gamosepalous, 

 2 to 3 mm. high, glabrous, 5-lobed, persistent; lobes erect in 

 anthesis, subrotund, slightly unequal, entire: corolla 6 to 7 mm. 

 long, tubular for about two-thirds its length, externally gla- 

 brous, densely ferruginous-pubescent towards the base within; 

 lobes 5, erect or slightly spreading, oblong-ovate, rounded at 

 the apex: glands usually 5, occasionally 3: stamens 8, included; 

 the outer series or cycle consisting of 5 distinct stamens about 

 equalling the more or less coalescent filaments of the 3 inner 

 stamens; anthers oblong, acutish: capsule oblong-globose, 

 subtriangular in cross-section, 15 to 18 mm. long, nearly or 

 quite as broad, glabrous, septicidally dehiscent; the carpels 

 later splitting along the median line: seeds carunculate, oblong, 

 about 13 mm. long, n mm. broad, slightly roughened. Ficus 

 Jaliscana Millsp. Field Col. Mus. Bot. Ser. i. 293 (1896), not 

 Watson. Jacaratia Mexicana Millsp. 1. c. 35 (1895), not DC. 

 MEXICO. State of Yucatan: near Izamal, collection of 1895, 

 Dr. Geo. F. Gaumer, no. 365 (hb. Field Mus.); San Anselmo, 

 Dr. Geo. F. Gaumer, no. 1705 (hb. Field Mus.); near Izamal, 

 15 January, 1895, Dr. Chas. F. Millspaugh, no. 96 (hb. Field 

 Mus.); vicinity of Izamal, 22 February, 1906, /. M. Greenman, 

 no. 478 (hb. Field Mus.). 



