knowlton.] DESCRIPTION OF SPECIES. 11 
instead of decidedly obtuse. It lias also a much thicker petiole, and, 
moreover, is a much larger leaf and has secondaries at a greater angle. 
But these forms are undoubtedly closely related, and were it not for 
their widely separate geographic and geologic positions they might 
possibly be considered as identical. 
Habitat. — Point of Hocks, Wyoming. 
Dryophyllum stjbfalcattjm Lx. 
Dryophyllum subfalcatum Lx., Bull. U. S. Geol. and Geog. Surv. Terr., Vol. I, p. 379 
(1875); Aim. Rept. U. S. Geol. and Geog. Surv. Terr., 1874, p. 301 (1876); ibid., 
1876, p. 506 (1878); Tert. Fl., p. 163, PI. LXIII, fig. 10 (1878). 
Dryophyllum Bruneri Ward, Syn. Fl. Lar. Gr., p. 551, PI. XXXVII, figs. 6-9 (1886); 
' Types Lar. Fl., p. 27, PI. X, figs. 5-8 (1887). 
The type specimen of Lesquereux's Dryophyllum subfalcatum should 
be the property of the United States National Museum, but the records 
do not show that it has ever been there, and its present location, even if it 
is in existence, is unknown. We have, therefore, to depend entirely upon 
the figure given by Lesquereux in the Tertiary Flora, which represents 
only the upper portion of a small leaf. It is linear-lanceolate in shape, 
with a narrowly taper pointed apex, and has the borders regularly serrate 
with short blunt teeth which are turned outward. The nervation was 
well preserved, and shows the lateral nerves to be oblique, close, 
parallel, and running straight to the teeth. An upper branch from 
near the apex of the secondaries passes under the sinuses and, closely 
following the borders, anastomoses with the fibrillse. The nervilles are 
numerous, close, percurrent, and form nearly regular rectangular areas. 
I have united with this the Dryophyllum Bruneri of Ward, probably 
obtained in part from the same locality that afforded Lesquereux 7 s 
specimen of D. subfalcatum. This is represented by a large number of 
very perfectly preserved specimens, four of which have been figured by 
Professor Ward (op. cit., PI. X, figs. 5-8). Of these, fig. 7 agrees per- 
fectly with Lesquereux's figure, and there can be no doubt of the 
identity of the forms. These later specimens are much better pre- 
served, and from them we are able to make out the form of the base. 
D. Bruneri was described as follows by Professor Ward : 
Leaves lanceolate or oblong-lanceolete, pointed, abruptly narrowed to a short 
thick petiole, coarsely and obscurely sinuate-toothed except near the entire base; 
nervation craspedodrome ; midrib strong, straight, or a little curved; secondary 
nerves numerous (fifteen to twenty on each side) and close together, proceeding 
from the midrib at an angle varying from 35° to 80°, slightly curving upward, 
rarely forking or forming arches, the ultimate ramifications entering the teeth; 
nervilles faint, slender and wavy, percurrent, joining the secondaries only. 
This elaborate description agrees perfectly with that of D. subfal- 
catum so far as this species can be made out, and supplies the deficiencies 
of our knowledge concerning it. 
Habitat. — Point of Rocks, Wyoming. Hodges Pass, Wyoming. 
