282 LOWER EOCENE FLORAS OF SOUTHEASTERN NORTH AMERICA. 



Ocatrrence. — Holly Spriu<^ rituul. Holly Dcsci-iption. — Lc.ivos relatively large, elJip- 



Springs, Marshall County, Miss, (collected by tical in general outline, but somewhat variable 



E. W. Berry). Lagrange formation (in beds of in both size and form. Apr.v varies from 



Wilcox age), Puryear, Henry County, Tenn. bluntly pointed to broadly rounded. Base 



(collected by E. W. Berryl. broadly pointed, in many specimens slightly 



Collection. — U. S. National Museum. decurrent and in some specimens more or less 



Reyxosia wilcoxiaxa Berrv, n. sp. inequilateral. Length ranges from 10 to 13 



centmieters. Maxuuum wndth, midway be- 



Plate LXV, figures 6 and 7. ^^^^^^^,^^ ^j^^^ ^p^^^ .^,^^j ^j^^^ ^^.^^^^^ ^.^^^^^ j^.^^;^ ^ ^^ 



Description. — Leaves relatively small, ob- 6 centimeters. Margins entire. Texture co- 

 long-elliptical and somewliat inequilateral in riaceous. Petiole long, very stout, somewhat 

 general outhne, the apex broatUy rounded or curved, enlarging proximad, 3 to 3.5 centime- 

 shghtly emarginate, narrowed from above the ters m length. Midrib very stout, prominent 

 middle to the rather blmitly pointed base, on the lower surface of the leaf. Secondaries 

 Length about 2.1 centimeters. Maximum very stout and prominent; eight to ten subop- 

 width, above the middle, about 1 centimeter, posite to alternate pairs diverge from the mid- 

 Margins entire, full, inclined to be revolute. i-ih at angles of a])out 40° but curve slightly 

 Texture coriaceous. Petiole curved, short and until the marginal region is reached, where 

 stout, about 2 millimeters in length. Midrib they curve upward camptodromely, parallel 

 stout, prominent, curved. Secondaries thin, with the margins and very close to tliem. 

 largely immersed in the substance of the leaf; Smaller leaves have subparallel and more 

 about seven pairs diverge from the micbib at closely spaced secondaries than leaves the size 

 different angles: spacing reduced and angle of the figured specimen. Tertiaries very thin, 

 mereased toward the upper part of the leaf, numerous, subparallel, com])aratively straight. 

 Secondaries regularly curved and camptodrome percurrent at approximately right angles with 

 in the marginal region. Tertiari(>s obsolete. the long axis of the leaf. 



This species is much smaller and otherwise This is an exceedingly well marked species of 



differs from the other Wilcox species, Reynosia a Rhamnus-Uke leaf, relatively large and stout, 



prsenuntia. Like that species it is very similar the petiole remarkably stout and relatively 



to the existing Rrynosia se ptentriomiUs Urban, i^^g ^^^^ the venation typically that of Rham- 



a small -coastal tree of the Florida Keys and the ^^g its chief diagnostic character is the great 



Bahama Islands. gj^c of the secondaries and their ultimate course 



Occumncc.—Lfigrange formation (in beds of j^joj^g ^i^g extreme margins of the leaf. Expe- 



Wilcox age), Puryear, Henry County, Tenn. ^.-^^^^^^ gj^^^^g ^jiat fragments of leaves an inch 



(collected by E. n. Berry). pj. ^^^^ across can at once be recognized by 



Collection. — U. S. National Museum. these features. 



Genus RHAMNUS Linne. There are numerous fossil s])ecies of Rhamnus 



... ,. , ,. .. , , which range in age from the Upper Cretaceous to 



Leaves large, oblong-elliptical. V enation very stout. , '^ ,' . . , ^. . , ., • 



Rhamvvs mnrginatus. the present, and it IS not surprising, when then- 

 Leaves smaller, ovate to lanceolate: aljimdance in the American Ujjper Cretaceous 

 Apex and base about equally pointed: j^ recalled, that tlie genus sliould form a promi- 



Secondaries remote Rhamnus eoligniticus. . , . \^ „ t^ • i 



Secondaries clo..e set Rhavmus cUburni. "ent element m our Eocene floras. It is, how- 

 Base much broader than the ape.x, secondaries clo.se ever, much less abundant in southeastern North 



set Rhamnus coushatta. America, where it comprises onlv three or four 



Apex cu.spidate-acuminate. species at most, than it is in the earlv Eocene 



Rhammxa marqinutus ainnilatus. ' , t-. i -.i • •" rr'i 



of the present Ilockv Mountam region. Ihe 



RiiAMxrs makgixatus Lesquercux. existing si)ecies number about three score and 



Plates LXXL figure 1, and LXXII, figure 1. consist of small trees and sju'ubs, ■widely distrib- 



Rltamnns man/inahis. Le.squereux, in Owen, I). I)., Sec- utedin all the temperate and in many of the trop- 



ond report of a geological reconnai.s.»ance of the ical parts of the world (cxcejit Australia and the 



middle and .southern counties of Arkansa.s, p. .319. i^]a,„is of the Pacific, ao'onling to Sargent ). 



Leie'reux,"Am!'philos. Soc. Trans., vol. 13, p. 420, Om/;rm«'.— Ackermnn formal ion, Hurleys, 



pi. 22, figs. 3-5, 18G9. B(>ntoii County (formerly ])art oi lijipah 



