140 THE FLORA OF THE DAKOTA GROUP. 



PARROTIA ? WiNCHELLI, Sp. nOV. 



PI. XXIX, Figs. 5, 6. 



Leaves coriaceous, of rough, undulate surface, rhomboidal, acute, 

 broadly wedgeforin at base, long-petioled, entire, penninerved or subtripli- 

 nerved; primary and secondary nerves tliin, rigid, craspedodrome, simple or 

 with few branches. 



The leaves, of which there are two of the same form, varj" from 7"™ to 

 8™ in length, and from .5"° to G..^"'" in width, the petiole, which is preserved 

 in the largest of them, measuring 5.5""', though still apparently broken at 

 Ijase. The secondaries, of which there ai-e four to six pairs, are parallel, 

 the lowest supra-basilar, equidistant, diverging from the median nerve at an 

 angle of 40°, thin, straight in passing to the borders; the two lowest pairs 

 only with a few branches; nervilles mostly simple, at right angles to the 

 .secondaries. 



The relation of these leaves is not positively ascertained. The char- 

 acter of their nervation relates them to the genus Parrotia, by a degree of 

 affinity with P. pristina Ett. (Flora v. Bilin pt. 2, PI. xxxix. Fig. 23 and pt. 3, 

 p. 4, PI. XL, Figs. 24, 25). But according to the desci'iption of the species 

 by the German author the leaves are cordate-ovate, undulate, or sinuate, 

 obtuse, truncate, emarginate at base, characters far diifei-ent from those of 

 the Kansas leaves. 



Habitat: Minnesota; Ellsworth County, Kansas. No. 102 of the 

 museum of the University of Kansas. Collected Ijy A. Wellington. 



Parrotia grandidentata, sp. nov. 

 PI. XXXIX, Figs. 2-4. 



Leaves subcoriaceous, not very thick, petioled, rhomboidal in outline, 

 rounded in naiTOwing to the base and entire to the middle, subtruncate or 

 naiTowed to the apex; deeply, obtusel}- dentate-lobed above; median nerve 

 strong; secondaries opposite, consisting of three to four pairs, curved in 

 ascending upward and each entering one of the teeth, craspedodrome, 

 simple, the lower supra-basilar; nervilles simple, somewhat flexuous, 

 jjarallel, at right angles to the nerves. 



The leaves are from 7'='" to lO"" long and from 6.5""' to lO*"" broad 

 between the apices of the lateral lobes. They are ovate from the base to 

 the middle, and there deeply dentate in narrowing to the apex; each of the 

 secondaries, wliich are simple, ])arallel and arclied in the same degree, enter- 



