DESCRIPTION OF SPECIES. 185 



Sterculia aperta Lesq. 

 PI. XXII, Fig. 4. 



Cret. and Tert. Fl., p. 82, PI. x, Figs. 2, 3. 



Le.aves subcoriaceous, palmately ti-ilobed, and triplenerved from the 

 base; lobes lanceolate, blnnt at apex; angle of diverg'ence broad. 



The leaf figiu'ed here differs from those in Cret. and Tert. Fl. (loc. cit.) 

 by the broader size of the lobes, which are more openly divergent with nar- 

 rower sinuses. The secondary nervation is obsolete. It has by its broader 

 lobes a degree of affiiiit}^ to Aralia (frwiilandka Heer,' which has, however, 

 the lol)es Ijroader, the lateral ones being sometimes cut into one or two 

 .short ol)tuse lobes on the lower side. The leaf from Kansas is like an 

 intermediate form between those figured in Cret. and Tert. Fl. (PI. x, Figs. 

 2, 3) and those of A. groenlandica figured by Heer. 



Habitat: Ellsworth County, Kansas. No. 8 of the museum of the 

 University of Kansas. Collected by A. Wellington. 



Sterculia obtusiloba Lesq. 

 Cret. and Tert. Fl., p. 82, PI. viii, Fig. 3. 



Tliough this form appears far different from the preceding one, it may 

 be a mere variety of the same species. 

 Habitat: Near Fort Harker, Kansas. 



Sterculia reticulata, sp. nov. 

 PI. XXXIV, Fig. 10. 



Leaves small, rigid, coriaceous, palmately trilobed from below the 

 middle, trinerved from above the basil border, entire, long-petioled ; lobes 

 half open, linear, obtuse, the middle longer; primary nerves thick, equal, 

 distinctly percurrent; secondaries oldicjue, ])arallel, close and equidistant, 

 strong, camptoilrome; nervilles deeji, at right angles, forming l)y subdivi- 

 sions a coarse, irregulary quadrate, or polygonal reti('ulation. 



The leaf, whicli is 7"'" long, including the petiole, which is itself 1..5™ 

 long, is fully preserved. It is inflated at the base, cuneiform, joining the 

 petiole at the same angle of divergence as the lateral primary nerves (40°), 

 and a little decurrent at the base. The median nerve is 27°"" long above 

 the sinuses, the lateral ones only 20°"". 



The leaf has for its nearest relative S. diversifolia G. A., as represented 



' Fl. Fobs. Arct., vol. 6, Abth. 2, p. 84, PI. xxxviii, Fig. 3. 



