FLORA OF THE FKUITLAND AXD KIRTLAND FORMATIONS. 



339 



seven secondary camptodronie branches on 

 the outside; nervilles numerous, strong, mostly 

 unbroken. 



This species is represented by a niunber of 

 examples, one of the best of which is figurecl. 

 It was probably not less than 13 or 14 centi- 

 meters in length and about 9 centimeters in 

 width, but the exact length can only be 

 inferred. It was conspicuously longer than 

 broad. The strong, three-ribbed nervation 

 and other details are wcU shown in the figure. 



This fonn appears to be most closely related 

 to Fims planicostata latifolia Lesquereux ' 

 (later called Ficus latifoUa (Lesquereux) Knowl- 

 ton), which was described originally from 

 specimens collected at Black Buttes, Wyo., 

 but has since been discovered at a number of 

 other locahties. If only the basal portion was 

 present it would be extremely difficult to dis- 

 tinguish the San Juan leaf from the previously 

 named species, but the shape of the whole leaf 

 is very different. Thus, in Ficus -planicostata 

 latifolia the blade is very much broader than 

 long, but in the one imder consideration the 

 reverse is true. 



Occurrence: Frmtland formation, 30 miles 

 south of Farmington and 1 mile east of reserva- 

 tion hue, San Juan County, N. Mex. Lot 

 75 (6956). 



Ficus sp. 



Plate LXXXIX, figure 1. 



The smgle much-broken specimen figured is 

 the only one noted. It is a rather large leaf 

 (about 12 centimeters long and 6.5 centimeters 

 wide) eUiptical-ovate, with apparently a shghtly 

 heart-shaped base, and entire margin. The 

 entire upper part is missing. The nervation 

 consists of a rather slender midrib and an un- 

 knowni number of thin, remote, alternate 

 secondaries, the lower of which has several 

 tertiary branches on the lower side. None of 

 the fuier nervation is retained, owing to the 

 coarse-grained matrix. 



This form is so poorly preserved that it is 

 hardly worth while to institute comparisons 

 between it and various named species. 



Occiurence: Fruitland formation, Amarillo 

 Canyon, 10 miles south of San Juan River and 

 4 rmles east of Chaco River, San Juan County, 

 N. Mex. Lot 16 (6958). 



1 Lesquereu-x, Leo, U. S. Geol. Survey Terr. Rept., voL 7, p. 202, pL 

 31, fig. 9, 1878. 



Ficus rhamnoides Knowlton. 



Plate LXXXVII, figure 3. 



Ficus rhamnoides Knowlton, U. S. Geol. Survey Bull. 163, 

 p. 47, pi. 10, figs. 1-3; pi. 11, fig. 1, 1900. 



This species was described originally from 

 specimens foimd in the Montana gi-oup at 

 Point of Rocks, Wyo. The specimen figured 

 here, although lacking aU the lower half of the 

 leaf, agrees m everj' particular with the original 

 specimens. 



Occurrence: Fniitland formation, 13 mUes 

 south of San Juan River and 1 mile east of 

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

 23 (6960). 



Ficus squarrosa? Knowlton. 

 Plate LXXXVl, figure 10. 



Ficus squarrosa Knowlton, U. S. Geol. Survey Bull. 163, 

 p. 45, pi. 8, fig. 2, 1900. 



The smgle example figured is referred with 

 doubt to this species. It is a much smaller 

 leaf than the type but does not appear to differ 

 essentially otherwise. It is so poorly preserved, 

 however, that it seems best to question the full 

 identification. 



Occurrence: Fruitland fonnation, 30 rmles 

 south of Farmington and 1 mile east of reserva- 

 tion line, San Juan Coimty, N. Mex. Lot 76 



(6963). 



Ficus sp. 



Plate LXXXVIII, figure 1. 



Leaf large, apparently nearly cncidar in gen- 

 eral outUne, rather broadly heart-shaped at 

 base, probably rounded above; nervation 

 strongly marked, consisting of seven ribs from 

 the top of the petiole, the central or midrib 

 slightly the stronger, with two pairs of opposite, 

 remote secondaries, other ribs (three on each 

 side) about equally dividing the broad blade 

 into four areas, the inner pair of ribs joining 

 the lower secondaries of the midrib; the lower 

 ribs wnth tertiary branches on the outside which 

 join by a series of broad loops just inside 

 the margin; nervilles numerous, very strong, 

 mainly broken ; fuier nervation producing quad- • 

 rangular areolae. 



This form is undoubtedly very weU marked, 

 but unfortunately it lacks nearly all the margin 

 except at the base and for a distance of some 

 4 centimeters above it. This leaf was probably 

 11 or 12 centimeters long and hardly less than 



