FLORA OF THE FRUITLAXD AXD KIETLAND FORMAIIO-N'S. 



333 



The little specimen figured is all that was 

 found of this form. It represents the upper 

 portion of the frond, but whether it is tlie whole 

 frond or a mere fragment can not be determined. 

 From its apparent affinities it seems probable 

 that the species was dimorphous, and tliat this 

 specimen is only the sterde portion, the fertile 

 frond remaining unknown. 



Anemia hesperia finds its closest affinity with 

 the hving species of the group including Ajic- 

 mia wrightii Baker, Aneynia cicutaria Kunze, 

 and Anemia cuneafa Kunze. These are all 

 natives of Cuba and are found growing in 

 crevices of rocks along shaded rivers. 



Occurrence: Fruitland formation, about 10 



mdes south of Jewett and 2J mUes east of 



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



14 (6947). 



Anemia sp. 



Plate LXXXIV, figure 4. 



The genus Anemia is very widely distributed 

 both areally and vertically, but it rarely hap- 

 pens that specimens arc well enough preserved 

 to convey any adequate knowledge of the 

 whole frond. The present material is so frag- 

 mentary that it does not admit of satisfactory 

 identification. The specmien figured is suffi- 

 cient to show clearly that it belongs to this 

 genus, but beyond tUat no judgment can be 

 ventured. It was evidently a large species, 

 with pinnaj cut deeply mto deltoid, very fuiely 

 toothed lobes. The nervation is of the usual 

 type. 



Occurrence: Fruitland fonnation, 30 miles 

 south of Farmington and 1 mile east of reser- 

 vation fine, San Juan Countv, N. Mex. Lot 

 76 (6953). 



Family PINACEiE. 



Sequoia reichenbachi (Geinitz) Heer. 



Araucarites reichenbaohi Geinitz, Charakteristik der Schich- 

 ten und Petrefacten des sachsisch-bohmischeu 

 Kreidegebirges, pt. 3, p. 98, pi. 24, fig. 4, 1842. 



Sequoia reichenbachi (Geinitz) Heer, Flora fossilis arctica, 

 vol. 1, p. 83, pi. 43, figs. Id, ab, 5a, 1868. 

 Lesquereux, U. S. Geol. Survey Terr. Rapt., vol. 6, 

 p. 51, pi. 1, figs. 10-lOb, 1874; U. S. Geol. Sun-ev 

 Men. 17, p. 35, pi. 2, fig. 4, 1892. 



The collections contain a few poorly pre- 

 served examples that are merely of sufficient 

 value to indicate the presence of this widely 

 spread species. 



Occurrence: Fruitland formation, 30 nules 

 south of Farmington and 1 nule east of reser- 

 55178°— 16 2 



vation line, San Juan County, N. Mex. In 

 cHnker above highest coal. Lot 75 (6956). 



Sequoia obovata? Knowlton. 



Sequoia obovata Knowlton, U. S. Geol. Survey Prof. Paper 

 101, p. — , pi. 30, fig. 7 (in press). 



Sequoia brevifolia Heer, Lesquereux, U. S. Geol. and 

 Geog. Survey Terr. Bull., vol. 1, p. 365 [1876]; Ann. 

 Kept, for 1874, p. 298 [1876]; Tenth Ann. Kept., for 

 1876, p. 500 [1878]; U. S. Geol. Survey Terr. Rept., 

 vol. 7, p. 78, pi. 61, figs. 25-27, 1878. 

 Knowlton, U. S. Geol. Survey Bull. 163, p. 27, pi. 4, 

 figs. 1-4, 1900. 



In the present collections from the San Juan 

 Basm is a single small, poorly preserved speci- 

 men that is clearly a Sequoia and from the few 

 leaves retained appears to belong to this 

 species. Tliat tliis may be so is rendered likely 

 by the fact that characteristic and well- 

 identified specunens have previously been 

 coUected in tliis same region. 



Occurrence: Fruitland formation. Hunters 

 Wash, 30 miles south of Farmington and 1 mile 

 east cff reservation line, San Juan County, 

 N. Mex. Lot 78 (6952). 



Geinitzia formosa Heer. 



Plate LXXXV. figure 3. 



Geinitzia formosa Heer, Rreideflora von Quedlinburg: 



Schweiz. Gesell. Neue Denkschr., vol. 24. p. 6, 



pi. 1, fig. 9; pi. 2, 1871. 

 Newberry, U. S. Geol. Survey Mon. 26. p. 51, pi. 9, 



fig. 9, 1876. 

 Knowlton, U. S. Geol. Smvey Bull. 163, p. 28, pi. 5, 



figs. 1-2, 1900; U. S. Geol. Sun-ey Prof. Paper 101, 



p. — , pi. 31, figs. 1-3 (in press). 



Tlie figured specimen is a fragment of a 

 branch of considerable size showing leaf bases 

 and traces of the leaves. It is of somewhat 

 doubtfid vafidity in tins comiection. 



Occm'rence: Fruitland formation, 17 miles 

 south of San Juan River and 2 miles east of Rio 

 Chaco, San Juan County, N. Mex. Lot 26 

 (6949). 



Family PONTEDERIACE.S;. 



Heteranthera cretacea Knowlton, n. sp. 



Plate LXXXV, figure 5. 



Leaf evidently tliick in texture, elliptical or 

 very shghtly ovate-eUiptical, abruptly nar- 

 rowed or rounded to a very narrow, short basal 

 portion, rounded and slightly pointed at apex; 

 three nerves arise in the basal portion of the 

 blade or petiole, one passing up the center of 

 the blade and the other two divichng the space 



