THE FLORA. 



119 



Order ARE C ALES. 



Family PALMACEAE. 



Sabal montana Knowlton. 



Plate III. figure 4. 



Sabal montana Knowlton. U. S. Geol. Survey Prof. Paper 



101, p. 2.53, pi. 32, fig. 3, 1918. 

 SabalUes grayanus (Lesquereux) Lesquereux, Tertiary 



flora: U. S. Geol. Survey Terr. Rept., vol. 7, p. 112, 



pi. 12, fig. 1 [not pi. 12, fig. 2], 1878. 

 Knowlton, U. S. Geol. Survey Bull. 163, p. 32. pi. 6, 



fig. .5, 1900. 



Leaves of large size, perhaps the largest of 

 all species found in the Rocky Mountain area, 

 palmate, with approximately 90 rays or folds; 

 petiole unarmed, apparently rounded on both 

 surfaces, 4 to 6 centimeters broad, prolonged 

 at apex with a relatively short triangular point 

 that is usually not more than 10 or 15 centime- 

 ters long, and often only S centimeters. 



Notwithstanding the fact that this species 

 has been reported — mainly under the name of 

 Sahal or Sahalites grayanuR — from a number of 

 localities, it is still unperfectly known. It is 

 so large that usually specimens that are any- 

 where near perfect can not be obtained. 



The type locality for Sahalites grayanus is the 

 Wilcox group of the Gulf region, where, ac- 

 cording to the recent work of E. W. Berry, it is 

 not uncommon in several localities. It is a 

 relatively small-leaved species with a rather 

 slender petiole and fewer raj^s than in S. 

 montana. What is believed to be the same 

 species has been found in the Raton formation 

 of southeastern Colorado and northern New 

 Mexico. 



Saial montana was based on material from 

 the Vermejo formation of the Raton Mesa re- 

 gion of Colorado and New Mexico, together 

 with the very large leaf from the Mesaverde for- 

 mation at Point of Rocks, Wyo., described by 

 Lesciuereux "° under the name Sahalites gray- 

 anus. The original of this specimen is No. 108 

 of the fossil-plant collections in the United 

 States National Museum, and I obtained an 

 additional example at Point of Rocks in 1896. 



The other specimen figured in the "Tertiary 

 flora" (PI. XII. fig. 2) is No. 109 of the United 

 States National Museum collections. It is said 



" Lesquereux, Leo, The Tertiary flora: U. S, OcoL Survey Terr. 

 Rept., VOL 7, pL 12, fig. \, 1X7? 



to have come from the "hard sandstone be- 

 tween coal banks" at Golden, Colo., but an 

 examination of the matrix shows that it is not 

 from the sandstone but from the andesitic ma- 

 terial and hence must have come from the 

 Denver formation. It is the one specimen on 

 which the presence of this species in the Denvei 

 depends, for no leaves have been found that 

 could with certainty be referred to that forma- 

 tion. That this specimen is the petiole of a 

 palm is clear, but bej'ond that it is impossible 

 to go. It might as well belong to any of the 

 other large palms, and as a factor in revealing 

 the distribution of this species it must be dis- 

 missed. 



Occurrence: Laramie formation, dump of 

 Reliance mine, If miles northeast of Erie, Colo., 

 collected by F. H. Knowlton; Hoyt's coal 

 mine, 1 mile south of Golden, Colo., collected 

 by Arthur Lakes, 1890. 



Order JUGLANDALES. 



Family JTJGLANDACEAE. 



Juglans leydenianus Knowlton, n. sp. 



Plate V, figure 1. 



Juglans leydenianus Knowlton [nomen nudum], U. vS. 

 Geol. Survey Bull. 696, p. 334, 1919. 



Leaflet evidently membranaceous, apparently 

 ovate-lanceolate, strongly unequal sided; mar- 

 gin perfectly entire; midrib fairly strong, 

 straight; secondaries rather remote, alternate, 

 thin, those on the narrow side of the leaflet at 

 an angle of approximately 40°, then much 

 curved upward and camptodrome. those on the 

 broad side of the leaflet emerging nearly at a 

 right angle, then curved upward and running 

 for a considerable distance just inside the mar- 

 gin; nervilles few, thin, oblique to the seconda- 

 ries. 



The fragment figured, which is apparently 

 near the middle of the leaflet, is all that has 

 been found of tliis form, and but for the fact 

 that the nervation is so strongly marked, it 

 would hardly be worthy of treatment. The 

 length can not be made out, though it prob- 

 ably exceeded 12 centimeters; the width is 

 nearly 7 centimeters. 



Occurrence: Laramie formation, Leyden 

 Gulch, 6i miles north of Golden, Colo., col- 

 lected by F. H. Knowlton, 1908. 



