24 FLORA OF THE MONTANA FORMATION. 
reason Dr. Hollick proposed its transfer. Its status can hardly be 
better fixed without additional material. 
Habitat. — Point of Rocks, Wyoming. 
Lycopodium Lesquereuxiana n. sp s 
Selaginella falcata Lx., ex p., Bull.U. S. Geol. and Geog. Surv. Terr., Vol. 1, p. 365 
(1875); Ann. Rept. U. S. Geol. and Geog. Surv. Terr., 1874, p. 207 (1876); Tert. 
Fl., p. 46, PI. LXIV, figs. 13, 13a [non PI. LXI, figs. 12-15] (1878). 
Stem thick, 10.5 cm. long, 1 cm. broad, round but flattened by com- 
pression, covered with densely imbricate, falcate, linear-lanecolate, acu- 
minate leaves, each with a distinct central nerve. 
The single specimen upon which this species is founded was referred 
by Lesquereux to his Selaginella falcata with the following remarks: 
Though the stem, PI. LXIV, fig. 13, was not found connected with auy fragment 
of branches, the leaves which cover it all around, imbricating at the base, but gene- 
rally directed toward both sides, are so exactly of the same character as those of 
the branches of PI. LXI, figs. 12 and 14, that one can but consider these fragments 
as representing the same kind of vegetable, [being] its stem and some of its divisions. 
A careful reexamination of the type specimen (No. 91, U.S.N.M.) 
shows clearly that Lesquereux's conclusions can not be sustained. The 
leaves are not especially directed toward both sides, thus becoming 
dichotomous, but are evenly distributed all around the stem, only ap- 
pearing to be two-ranked because the whole stem is flattened by com- 
pression. The leaves are longer, narrower, and provided with a strong 
central or median nerve. A still stronger objection to their represent- 
ing different parts of the same species lies in the fact that, so far as the 
living species are concerned, it is impossible to have a Selaginella with 
the primary stem bearing multifarious leaves, and the branches having 
the leaves strictlv two-ranked. 
There are several living species of Selaginella that have multifarious 
leaves, as S. spinosaT*. Br., 8. ruprestris (L.) Spring., 8. deflexa Bracken., 
etc., but they are all very small and slender, while the species under 
consideration is large and thick. It is clearly a Lycopodium, as shown 
by the leaves being continuous with the stem and by its general habit. 
It is very similar to several living species, but especially to L. selago 
X., from the sterile stems of which it can hardly be distinguished. 
I have named this species in memory of Leo Lesquereux, who has 
done so much to make known the fossil flora of this country. 
Habitat. — Point of Bocks, Wyoming. Collected by William Cleburn. 
Selaginella laciniata Lx. 
PI. Ill, figs. 5-8. 
Selaginella laciniata Lx., Bull. U. S. Geol. and Geog. Surv. Terr., Vol. I, p. 378 
(1875); Ann. Rept. U. S. Geol. and Geog. Surv. Terr., 1874 : p. 297 (1876); ibid, 
1876, p. 499 (1878); Tert. FL, p. 47, PL LXIV, figs. 12, 12a (1878). 
