146 DESCRIPTION OF SPECIES. 



blunt teeth of the borders. The leaves are also proportionally shorter. 

 5 to 7 centimeters long and 1 to 2 centimeters broad near the base. It is 

 intermediate between the preceding and the following species. 

 Hab. — With the preceding. 



Myrica Zachariensis, Sap. 

 Plate XXV, Fig. 5 ; XLV, Figs. ti-9. 



Leaves very variable in size and shape, lanceolate and linear, narrowed and more 

 or less decurreut to the petiole; medial nerve thick; lateral nerves open, curved in pass- 

 ing to the borders and along them; teeth entered by branchlets. 



This species, as figured by Saporta, "Et.," i, ii, p. 201, fig. 5, is repre- 

 sented in pi. xxv, fig. 5, and xlv\ fig. 7. It is the variety b. elongata. The 

 variety c. angustifolia, Sap., loc. cit., fig. 1, has the character of pi. xlv a , 

 figs. 6-8, while fig. 9 of the same plate is exactly like a counterpart of fig. 

 10b., Sap., "Et.," ii, pi. 5, which is the variety minuta of this species. It 

 differs from the two preceding species by the gradual narrowing of the 

 base to the petiole, the border base being decurrent to it and bordering it 

 to the point of attachment. 



Hab. — Florissant. Specimens, pi. xlv a , figs. b'-9, are from Alkali Station. 



Myrica polymorpha, Scrip. 

 Plate XXV, Figs. 1, 2. 



Leaves thickish, membranaceous or subcoriaceous, long-lanceolate or linear-lan- 

 ceolate acuminate, narrowed at base to a short petiole, serrate or denticulate; primary 

 nerves thick at base, the lateral more or less oblique, slightly curving in passing to the 

 borders. 



This species is described by Saporta as Myricophyllum Zachariense, 

 "Et.," i, ii, p. 220, pi. viii, fig. 2, with varieties spimdosa and laciniata, 

 according to the more or less deep and acute teeth of the borders. Our 

 plate represents the normal form. The leaves are long comparatively to 

 their width — 6 to 8 centimeters long, 5 to 6 millimeters broad. The spe- 

 cies is, like the preceding, very polymorphous. The author compares it to 

 the living Myrica JEthiopica, Linn., especially as to its nervation. 



Hab. — Very common at Florissant. 



Myrica callicomaefolia, sp. nov. 

 Plate XXVI, Figs. 5-14. 



Callicoma microphylla, Ett., "U. S. Oeol. Rep.," vii, p. 246, pi. xliii, figs. 2-4. 



This species is evidently a Myrica. Better specimens show that the 



