FLORA OF THE FRUITLAND AND KIRTLAND FORMATIONS. 



337 



or is another nearly detached lobe below the 

 one shown in figure 2 is of course quite im- 

 possible to determine. Except for its close 

 resemblance to the lower lobe like that in 

 figm-e 2, tliis specimen might be considered 

 an individual leaf, but it is broken on the 

 upper side near the base, where it was un- 

 doubtedly connected to the other part of the 

 blade. 



Owing to the fragmentary nature of these 

 specmiens this generic reference is more or 

 less uncertain. In some respects they are 

 of the character of certain species of Myrica, 

 such, for instance, as Mynca alkalina Lesque- 

 reux,' from the Green River formation of 

 Wyoming, but they differ markedly in many 

 essential particulars. 



Occurrence: Kirtland shale, 3 inches below 

 base of Ojo Alamo sandstone, 1\ miles north- 

 east of Pina Veta Cliina, San Juan County, 

 N. Mex. Lot 40 (6966) . 



Family SALICACEiE. 

 Salix baueri Enowlton, n. sp. 



Plate LXXXVI, figures 7, 8. 



Leaves small, of firm texture, narrowly ellip- 

 tical-lanceolate, about equally narrowed to both 

 base and apex; margin entire; midrib rela- 

 tively very thick; other nervation obscure or 

 wanting. 



This little species is represented in the col- 

 lections by some half dozen specimens, three of 

 which are here figured. They are small leaves 

 3 or 4 centimeters in length and about 14 

 millimeters in greatest width. They are pre- 

 served on a very coarse grained matrix which 

 has obscured or obhterated nearly aU traces of 

 nervation except the very thick midrib. An 

 occasional secondary appears to be at an angle 

 of about 45° and much cm^ed upward near the 

 margin. 



These little leaves are so obscurely preserved 

 that their fuU character can not be made out, 

 and they are consequently of comparatively 

 little stratigraphic value. They are of about 

 the same size and shape as specimens of Salix 

 Integra Goppert from Black Buttes, Wyo., as 

 figured by Lesqucreux,^ but the absence of 



iLesquereux, Leo, U. S. Geol. Survey Terr. Rept.,vol. 8, p. 149, 

 pi. 45 A, figs. 10-15, 1883. 

 2 Idem, vol. 7, p. 167, pi. 21, flgs. 1, 2, 1878. 



most of the nervation makes it impossible to 

 compare them satisfactorily with this species. 

 Occurrence: Fruitland formation, 10 mUes 

 south of San Juan River and 4 mUcs east of 

 Chaco River, San Juan Comity, N. Mex. Lot 

 16 (6958). 



Salix sp. a Knowlton. 



Plate LXXXVI, figure 9. 



Salix sp. a Knowlton, U. S. Geol. Survey Prof. Paper 101, 

 p. — , pi. 38, fig. 1 (in press). 



The collection contams a number of willow 

 leaves that are indistinguishable from a form 

 described and figured from the Vermejo for- 

 mation of the Raton Mesa region. The leaf 

 figm'ed here, which is one of the best, is about 

 8 centimeters in length and 1.8 centimeters in 

 width. It has a very thick midrib and only 

 faint indications of secondaries, which appear 

 to be close, parallel, and at an angle of about 

 45°. It is so indistmctly preserved that it has 

 not been thought desu-able to give it a specific 

 name. 



Occurrence: Fi-uitland formation, 10 miles 

 south of San Juan River and 4 mdes east of 

 Chaco River, San Juan County, N. Mex. Lot 

 16 (6958). 



Family FAGACE.ffi. 



Quercus baueri Knowlton, n. sp. 



Plate LXXXVI, figures 5, 6. 



Leaf small, of coriaceous texture, ovate- 

 elliptical, about equally rounded to both base 

 and ape.x; margm provided with relatively 

 strong, rather obtuse teeth; micbib veiy strong; 

 secondaries about four pairs, strong, alternate, 

 craspedodrome, terminating in the teeth; finer 

 nervation obscure. 



The specimen here figured is nearly perfect 

 and is 3.5 centimeters long and 2 centimeters 

 wide. It was evidently a rather thick and 

 coriaceous leaf, as is attested both by its thick 

 nervation and by its general appearance. 



This species has some resemblance to an mi- 

 pubhshed species of Quercus from the Vermejo 

 formation but differs in its shghtly smaller size 

 and less prominent teeth. 



Occmrence: Fruitland formation, from 

 chnker above highest coal bed, 30 miles south 

 of Farmington and 1 nfile east of reservation 

 line, San Juan Basin, N. Mex. Lot 75 (6956). 



