LANCE FLORA OF EASTERN WYOMING 147 



Myrica torreyi minor Lesquereux, U. S. Geol. and Geog. Surv. Terr., Ann. Rept. (1873), 397, 1874. 

 Myrica coriacea Knowlton, U. S. Geol. Surv. Prof. Paper 101, 256, pl. 37, fig. 5, 1917. 

 Myrica duhia Knowlton, U. S. Geol. Surv. Prof. Paper 130, 123, pl. 5, fig. 3, 1922. 

 Myrica oblongifolia Knowlton, U. S. Geol. Surv. Prof. Paper 130, 124, pl. 21, fig. 1, 1922. 

 Myrica sp., Knowlton, U. S. Geol. Surv. Prof. Paper 155, 44, pl. 11, fig. 7, 1930. 



Remains of this characteristic leaf, which are abundant in several other floras of similar age, 

 are conspicuously rare in the Lance Creek collections. Only 3 fragmentary specimens have been 

 obtained; one of these from this region is in the collections of the U. S. National Museum (specimen 

 No. 40257). This was probably the specimen on which Knowlton had previously reported the 

 occurrence of this species in the Lance Creek area.' 



A full description and a discussion of the possible relationships of Myrica torreyi has pre- 

 viously been given in my report on the Medicine Bow flora, cited above. A persistent search 

 among living species for leaves like those of this well-defined form has failed to disclose further 

 comparisons. The continued retention of the generic name Myrica, with its definite implication 

 of relationship to this modern genus, is therefore not considered warranted. The change to the 

 name Myrtophyllum is believed to be substantiated by comparison with leaves of the living Myr- 

 tacese. 



Occurrence — Locality P3853; U. S. Geol. Survey Locality 1464. 



Collection — U. S. National Museum, No. 40257. 



Family ARALIACE^ 



Genus ARALI^PHYLLUM Fontaine 



Aralisephyllum artocarpoides (Lesquereux) Dorf, n. comb. 



(Plate 13, Fig. 4) 



Ficus arlocarpoides Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 8, 227, pl. 47, figs. 1-5, 1883. Knowlton, 

 Proc. Washington Acad. Sci., vol. 11, 185, 1909. Dorf, BuII. Geol. Soc. Amer., vol. 51, 218, 222, 225, 

 1940. 



Ficics preartocarpoides Brown (in part), U. S. Geol. Surv. Prof. Paper 189, 249, pl. 53, figs. 4, 5 only, 1939. 



Cornus fosteri Ward, U. S. Geol. Surv. 6th Ann. Rept., 553, pl. 47, fig. 8, 1885; U. S. Geol. Surv. Bull. 37, 54, 

 pl. 25, fig. 5, 1887. 



The specimen here figured and its counterpart were the only ones of this form encountered. 

 A comparison with the type and figured specimens of Ficus artocarpoides and Cornus fosteri indi- 

 cates a striking similarity in all details. The specimens of Ficus preartocarpoides recorded by 

 Brown from the Hell Creek flora of Montana are equally comparable, except that some of his 

 larger specimens have distinct lobelike teeth, usually above the middle on one side of the leaf. 

 This occasional occurrence of short lobelike teeth on otherwise entire-margined leaves is often 

 met with in members of the Araliacese, especially in Anomopanax cumingianus (Presl) Merrill 

 (New York Botanical Garden, sheet No. 1108). I have not seen this type of marginal variation 

 in any species of Ficus or Cormis, so have accordingly changed the generic name of this leaf type 

 to Aralisephyllum, implying a family relationship to the existing Araliaceae. 



As here interpreted, this species is at present known from the type Lance, the Hell Creek, 

 and the Fort Union floras. Brown has recently suggested additions to the synonymy of this 

 species,^ including specimens from the Paskapoo and Ravenscrag formations of Canada. The 

 Lance Creek specimens are unfortunately not sufficiently complete in the apical region to verify 

 Brown's suggestions. The specimens from the Wilcox and Raton formations which have been 

 referred to this species ' seem to me to have a different type of venation, lacking branches on the 

 lower sides of the secondaries. 



Occurrence — Locality P3651. 



Colleciion—lJ. C. Mus. Pal., Plesiotype No. 2535. 



' Knowlton, F. H., Proc. Washington Acad. Sci., vol. 11, 207, 1909. 

 2 Brown, R. W., U. S. Geol. Surv. Prof. Paper 189, 249, 1939. 



' Hollick, A., Geol. Surv. Louisiana, Spec. Rept. 5, 281, pl. 47, figa. 1-5, 1899. Berry, U. S. Geol. Surv. Prof. Paper 91, 

 200, pl. 34, fig. 2, 1916. Knowlton, U. S. Geol. Surv. Prof. Paper 101, 300, pl. 71, fig. 3, 1917. 



