FOX HILLS AND LOWER MEDICINE BOW 49 



Family CANNACE^ 



Genus CANNA Linn^ 



Canna cf. C? magnifolia I^owlton 



(Plate 2, Fig. 5) 



The singlc incomplete specimen figured is the only onc of this kind in the coUections. It is 

 evidently closcly related to Canna? magnijolia and Canna? sp. from the Vermcjo formation.' 

 The only apparent difference is the absence of the faint alternation of thick and thin veins shown 

 in Kno\vlton's figures and in the type specimens. Berry has reported fragments comparable to 

 the same species from the Lance formation of South Dakota.^ I have seen Berry's specimens at 

 the U. S. National Museum and find them indistinguishable from the observable features of the 

 Medicine Bovv specimen. 



Among hving forms this type of leaf has been found to bear a general resemblance to the 

 leaves of Musa and Heliconia of the Musacece, Maranta and Thalia of the Marantacea;, and 

 Canna of the Cannacese. The uniform thickness of the numerous veins in the fossil specimens 

 resembles most closely the leaves of Canna and Thalia. 



Occurrcnce — Corson Ranch, Wyoming, Loc. P. 372. 



Collectio7i—V. C. Mus. Pal., No. 1305. 



Family ZINGIBERACE.E 

 Genus ZINGIBERITES Heer 

 Zingiberites dubius Lesquereux 



(Plate 2, Fig. 4) 



Zing-ihcrites duhius Lesquereux, Rept. U. S. Geol. Surv. Terr., voL 7, 95, pl. 16, fig. 1, 1878; Ivnowlton, U. S. 



Geol. Surv. Prof. Paper 155, 43, 1930. 

 Zingiherilcs? undulatus Lesquereux, U. S. Geol. and Geog. Surv. Terr., Ann. Rept. (1873), 396, 1874. (Homo- 



nym, Heer, 1856.) 



The fragment figured is the only identifiable specimen of this type in the collections. It is 

 clearly marked by parallel veins, the heavier ones about 1.5 to 2 mm. apart, with the lighter ones 

 intermediate and numbering 5 to 7 between each heavier pair. These venation characters are 

 similar to those of the specimens of Zingiberites dubius from the Denver formation. 



Both Lesquereux and Knowlton rightfuUy regarded this species as of doubtful taxonomic 

 status. It is unfortunate that more complete specimens have not been found to add to the 

 knowledge of its leaf form and characteristics. 



Occurrence — Corson Ranch, Wyoming, Loc. P. 372. 



Collection—JJ . C. Mus. Pal., Plesiotype No. 1306. 



Family MYRICACE.E 



Genus MYRICA Linn6 



MjTica torreyi Lesquereux 



(Plate 4, Figs. 1, 2, 3) 



Myrica torreyi Lesquereux, U. S. Geol. Surv. Terr., 6th Ann. Rept., 392, 1873; Rept. U. S. Geol. Surv. Terr., 

 vol. 7, 129, pl. 16, figs. 3-10, 1878; Ward, U. S. Geol. Surv., 6th Ann. Rept., 551, pl. 40, fig. 4, 1886; idem, 

 Bull. 37, 32, pl. 14, fig. 5, 1887; Knowlton, U. S. Geol. Surv. BuU. 163, 34, pl. 6, figs. 1-3, 1900; idem, 

 Prof. Paper 98, 90, 336, pl. 17, fig. 7, pl. 86, fig. 1, 1916; idem, Prof. Paper 101, 256, pl. 37, figs. 2-4, 

 1917; idem, Prof. Paper 130, 123, 1922. 



Myrica torreyi 7ninor 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 dubia Knowlton, U. S. Geol. Surv. Prof. Paper 130, 123, pl. 5, fig. 3, 1922. 



Myrica oblongifolia Ivnowlton, 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. 



Specimens of this type were present as one of the dominants in 4 of the 6 Medicine Bow 

 localities. More than 50 well-preserved specimens were collected for study. At first I was 



' Knowlton, F. H., U. S. Geol. Surv. Prof. Paper 101, 254, 255, pl. 36, fig. 3, 1917. 

 » Berry, E. W., U. S. Geol. Surv. Prof. Paper 185-F. 129, 1934. 



