DESOKIPTION OF SPECIES— MAGNOLIACE^, 249 



IfIa;;nolia teiiiiiiicrvis, Lesqx. 



Plate XLIV, Figs. 5, G; Plate XLV, Figs. 1-5. 



Magnolia tenuinervia, Lesqx., Annual Report, 1809, p. 196. 

 Magnolia Inglefieldif (Ileer), Lesqx., Aiiuual Report, 1872, p. 396. 



Leaves of large size, Bnbcoriaccous, eutire, broadly lanceolate, obtusely pointed, rounded to tbo 

 base; lateral nerves distant, braneliin^ irregularly, undulate in passing to the borders, which they 

 closely follow in simple elongated bows. 



The midrib of these leaves is not as thick as in the former ; the substance 

 of the leaves is somewhat more solid, but not coriaceous; the lateral veins, 

 about on the same angle of divergence, are thick, more irregular in distance, 

 generally undulate, and branching sparingly and irregularly; the topis not 

 contracted, but rather obtusely cuneiform, and, as seen in pi. xlv, figs. 2 and 3, 

 the leaves are not enlarged above the middle, l)ut ratlier oval-oblong, and 

 rounded to the base, as seen in fig. 3. As all the leaves found of this species 

 are fragmentary, I could not distinctly recognize their basilar outline. Tiie 

 primary areolation, seen in figs. 1 and 3 of the same plate, is composed 

 of large, irregularly square or polygonal meshes, formed by subdivisions, 

 cither oblique or in right angle, of the nervilles, which are generally distinct; 

 the ultimate areolation is obsolete. I considered this species as perhaps 

 referable to df. Iiiglefieldi, Heer, of the Arctic Flora, a species represented, 

 like ours, by numerous fragments. The characters of nervatio.n are the same, 

 and the middle part of the leaf is also similar. But the Arctic species has 

 the leaves gradually narrowed to the base, and their substance is coriaceous, 

 the surface polished, etc., characters at variance with those of this one. Fig. 

 5 of pi. xlv seems different, and its reference seems at first unjustified; but, 

 comparing it with fig. 3, tlie identity is easily recognized, for the lateral veins 

 are not thicker, but merely deeply carved into the stone, as indicated by the 

 shaded borders. The name of ienuinervis, given to this species from tiie first 

 specimen seen of it, is not quite appropriate, the veins being thin only on the 

 upper surface of the leaves, as in figs. 2, 3, and 4. 



Habitat. — Golden, Colorado, and Black Buttes, Wyoming; not rare. 



The first specimen (fig. 4) was communicated by l)r. F. V. Hayden in 1868 



from Golden. 



magnolia Hilgardiaiia, Lesqx. 



Plate XLIV, Fig. 4. 



Magnolia migardiana, Lesqx., Trans. Am. Phil. Sec., vol. xiii, p. 421, pi. xx, fig. 1 ; Supplement to Annual 

 Report, 1871, p. 15.— Schp., Pal. V6g6t., iii, p. 74. 

 Leaves large, oblong-oval, rounded in narrowing to the petiole; borders slightly undulate; mid- 

 rib comparatively narrow ; secondary nerves close, parallel, caraptodrome. 



The fragment figured is far from giving an idea of the fine leaves from 



