208 



LOWER EOCENE FLORAS (IK SOnil EASTERX NORTH AMERICA. 



Occurrence. — Grenada fdrmation. Cii-cnada, 

 Grenada County, Miss, (collected by E. X. Lowe 

 and E. W. Berry). Lagrange formation (in 

 beds of \Vilcox a<je), Puryear, Henry County, 

 Tcnn. (collected by E. W. Berry). Wilcox 

 group, 2} miles and ,'U- mil<^s southeast of 

 Nal)orton, De Soto Parish, La. (collected by 

 G. C. Matson and (). B. Hopkins). 



Collections. — v. S. National Museum. 



Genus KNIGHTIOPHYLLUM Berry, n. gen. 



KxiGHTiopnYLLUM wiLcoxLVNTM Bcrrv, n. sp. 



Plate XXXV, fisures 1-3. 



Description. — Leaves of different sizes, ovate 

 in general outline, widest at or slightly below 

 the middle and narrowing gradually to the ob- 

 tusely pointed apex and rather abruptly to the 

 acuminate base. Length ranges from 8 to 14 

 centmieters. Maximum width ranges from .3 

 to 5 centmieters. Margins entire near the base, 

 above which they are beset with UTegularly 

 spaced, large, recurved, outwardly directed or 

 aciuiline teeth, whicli in the tip of the leaf be- 

 come reduced to dentate points and ultunately 

 disappear. Texture coriaceous. Petiole long 

 and stout, about 3.5 to 4 centmieters in length. 

 Midrib stout, prominent on the lower surface of 

 the leaf. Secondaries rather stout, numerous, 

 somewhat irregularly spaced ; they diverge from 

 the midrib at angles of about 60°, curving but 

 slightl}- in their outward course until they 

 curve upward in a camptodrorae manner some 

 distance from the margin. A few secondaries 

 pursue a craspedodrome course, but m general 

 a tertiary branch proceeds to the tip of the 

 large teeth. There are some tertiaries inter- 

 mediate between the secondaries and sul)- 

 parall(4 with them, and a few percurrent ter- 

 tiaries that except for their ri^duced caliber 

 might be considered forks of the secondaries. 

 The finer areolation is obsolete by immersion in 

 the leaf substance. 



This very chara(;teristic leaf is r(!j)resented by 

 a consideral)le amount of material and is dis- 

 tinguished at once by the peculiar large mar- 

 ginal teeth, which r(;semble more or less those 

 of some species of Quercus, Ceratopetalum, 

 Panax {Panax arhoreum Forster), and CIito- 

 deodron {Clerude.ndron serratum vSprongel). The 

 I)resent species is practically identical in all of 

 its characters with tlu; leaves of tlie existing 



Knigiitia cjcdsa Iv. lirown. and it is therefore 

 made the basis of tlie form genus Knightiophvl- 

 lum, which indicates its probalile botanic 

 adinity without implying actual generic iden- 

 tity with the recent species of Knightia, which 

 are confined to Australia and Xcw Zealand, but 

 seem to be represcnt(>d in the European 

 Tertiary. 



Occurrence. — Lagrange formation (in ])eds of 

 Wilcox age), Puryear, Henry Count v, Tenn 

 (collec,ted'l>y E. W". Berry). 



Collection. — U. S. National Museum. 



Genus BANKSIA Linne fils. 



Banksia saffordj (Lesquereux) Beny. 



Plate XXXVI, film's 5 ami (i. 



Qiurcus Saff'ordi. Lesquereux, Am. Jour. Scl., 2d t^er., 



vol. 27. p. 364, 18G9. 

 T>esquereux in Owen. D. D., Secoml report of a geo- 



loffical roconnaissaiice of the middle and southern 



counties of Arkansas, p. 319. pi. fi. fig. 3, 18(10. 

 Lesquereux in Safford, J. M., Geology of Tennessee, 



p. 427. 1)1. K, figs. 2a-r. 18G0. 

 Lesquereux, U. S. Nat. Mus. Proc., vol. 11, p. 13, pi. 5, 



figs. 1-3, 1888. 

 Loughridge, Report on the geological and economic 



features of the Jackson's purchase region, pp. 196, 



198. figs. 2a-c, 1888. 

 Knowlton. in Glenn, L. C, U. S. Geol. Survey Water- 



Supply Paper 164. p. 38, 1906. 



Dcscnptton. — Leaves linear-lanceolate in out- 

 line, widest in the basal half; base more or l(>ss 

 (Mitire, gradually attenuated, and decurrent; 

 apex greatly extended and gradually narrowed, 

 more or less prominently toothed, and acumi- 

 nate. Size variable, the average form having 

 a length of about 16 centimeters and a maxi- 

 mum width below the middle of aliout 1 centi- 

 meter. A specimen from Wicldiffe, Ky., 

 shows the basal part of a larger leaf, which is 

 1 .h centimeters wide, and another specimen 

 from the same locality, not positively identi- 

 fied, is 2.4 centimeters in maximum width. 

 Lesquereux, in his description of this species 

 in 1869, says: "Rarely an inch bi'oad, 4 to 6 

 inches long," thus rather overestimating the 

 width and underestimating the lengtii. The 

 average size as given above is based on a con- 

 siderable nundicr of specimens of uniform size 

 and appearance from areas as remote as La 

 Grange, in soutiierti Tennessee, ami Wicldiffe, 

 in noi'thwestern Kentucky. The texture is co- 

 riaceous and the leaves were obviously more or 

 less rigid in life, since they also have a thick 



