THE FLORA. 



123 



aiul about 14 millimeters in broadest diameter. 

 If eorrectly interpreted, it should belong to 

 that section of the living genus in which the 

 husk or e-xocarp adheres closely to the shell 

 and splits away only at maturity, and even 

 then not to the extreme base. 



In the material from Mount Carbon, near 

 Morrison, there is another specimen of this 

 species. It is of about the same shape as the 

 one figured but is a little larger. 



Occurrence: Laramie formation, Marshall, 

 Colo., railroad cut between old and new sta- 

 tions, collected by A. C. Peale; Moimt Carbon, 

 near Morrison, Colo., collected by Aithur Lakes. 



Hicoria minutula Knowlton, n. sp. 



Plate V, figure 5. 



Hicoria minutula Knowlton [nomen nudum], U. S. Geal. 

 Survey Bull. 696, p. 320, 1919. 



Similar to the last but very much smaller. 

 The length is 14 millimeters and the diameter 

 about 9 millimeters. The husk, less than 1 

 millimeter thick, is apparently present, and in 

 the apical portion it may he noted becoming 

 fibrous or slightly frayed. 



It is not certain that this should be held as 

 distinct from H. aiigulata, as it hardly differs 

 except in size and may be only an immature 

 specimen of that species. However, it can do 

 no harm to consider them separately imtil 

 further data can be procured. 



Occurrence : Laramie formation, wooded bluff 

 south of Marshall, Colo., collected by A. C. 

 Peale, 1908. 



Order MYRICALES. 



Family MYKICACEAE 



Myrica torreyi Lesquereux. 



Myrica torreyi Lesquereux, U. S. Geol. and Geog. Survey 

 Terr. Ann. Rept. for 1872, p. 392, 1873; idem for 

 1876, p. 503, 1878; Tertiary flora: U. S. Geol. Survey 

 Terr. Rept., vol. 7, p. 129, pi. 14, figs. 3-10, 187S. 



Ward, U. S, Geol. Survey Sixth Ann. Rept., p. 551, 

 pi. 40, fig. 4, 1886; idem, Bull. 37, p. 32, pi. 14, 

 fig. 5, 1887. 



Knowlton, U. S. Geol. Survey Bull. I<i3, p. 34, pi. 6, 

 figs. 1-3, 1900. 



Cockerell, Colorado Univ. Studies, vol. 7, p. 150, 1910. 



The type locality of this species is Black 

 Buttes, Wyo., and all but two of the figured 

 types are preserved in the United States Na- 

 tional Museum (Nos. 138-142, inclusive), the 

 others having been lost or misplaced. The 

 species was well described and illustrated by 

 Lesquereux, and none of the material since 



obtained adds materiidlv to our knowledge 

 of it. 



vSince the original finding at Black Buttes 

 this species has been reported, on evidence of 

 more or less value, as occurring at so many 

 additional localities that it has largely been 

 robbeil of its value as a stratigraphic marker. 

 Thus, Ward found it at Point of Rocks, Wyo., 

 in beds now referred to the Mesaverde forma- 

 tion. These specimens are illustrated in my 

 ''Flora of the Montana formation,'"" and al- 

 though the leaves shown in figures 1 and 2 of 

 that bulletin are probably cori-ectly identified, 

 that of figure 3 is more doubtful. 



Wliat was presumed to be this species was 

 found at Dunn's ranch, 30 miles north of 

 Laramie, Wyo., and also at Harper station, 

 on the LTnion Pacific Railroad about 6 miles 

 west of Dunn's ranch. All these localities are 

 now referred to the Mesaverde formation. 

 The species has also been reported from the 

 Mesaverde formation near Meeker, Colo., and 

 the Vermejo formation at Rockvale, near 

 Canon City, at La Veta, near Trinidad, and at 

 Walsenburg, C'olo. It has likewise been le- 

 ported from the Lance formation of Converse 

 County, Wyo., although the specimens found 

 there are narrower than is usual. 



Occurrence: Laramie formation. Crow Creek, 

 2.5 miles southeast of Greeley, Colo. Post- 

 Laramie (in my opmion). Black Buttes, W3'o. 

 (types). ?Lance formation, Converse County, 

 Wyo. Mesaverde formation, Point of Rocks, 

 Wyo. Vermejo formation, Rockvale, La Veta, 

 and Walsenburg, Colo. 



• Myrica dubia Knowlton, n. sp. 



Plate V, figure 3. 

 Myrica dubia Knowlton [nomen nudum], U. S. Geol. Sur- 

 vey Bull. 69(3, p. 394, 1919. 



Leaves small, lanceolate, obtusely wedge- 

 .shaped at base (apex destroyed) ; margin en- 

 tire; midrib relatively thick; intramarginal 

 vein well marked, other nervation consisting 

 of thin, irregular veins connecting the midrib 

 and intramarginal vein. 



This species is most closely related to Myrica 

 torreyi Lesquereux "* but differs in its smaller 

 size, more obtuse base, and above all the per- 

 fectly entire margin. 



61 U. S. Geol. Survey Bull. 103, p. 34, pi. 6, figs. 1-3, ISOn. 

 59 Lesquereu-x, Leo, U. S. Geol. Survey Terr. Rept., vol. 7, pi. 16, 

 Dgs. 3-10, 1878. 



