JUGLANDALKri. 



183 



iui(lu]at.e. Potiohilo goiierally not proaorvod ; 

 m some of tlio spociincns from Wyoming it 

 raugos from 3 to 7 millinivitors in lougtli. Mid- 

 rib stout, nsiiidly curvcid. Socoudarios tluii, 

 nmnerous, ratlior t^xonly spacod, suT)parall«(l, 

 about 14 to 15 subujiposito to altoniato paire; 

 tlioy braucli from tlio midrib at wido angles 

 and curvo upward close to tlio margins in a 

 camptodnnuo nuuuun'. Tortiarios mostly por- 

 currcnt and ilistinct. Aroolation sul)([uadrato. 



Tliis species was described by Tx's<iuereux 

 from the Green Ri\'er I'^ocene, whore it is \«m'v 

 abmidant. _ It has also been recordiul fi'oin the' 

 Denver formation at Golden, Colo., and from 

 the Raton and Fort Union formations. It was 

 recorded by HoUick in consideraVdo abimdance 

 from the Wilcox of Louisiana. Wliate\-er may 

 be thought of tlio probability of a smgle species 

 extending from the base of the Eocene to the 

 Green River, the forms from the Wilcox arc not 

 distinguishable from those of the Green River. 

 as may be readih' observed by a comparison of 

 the figures of specimens from both liorizons. 

 Their reference to the genus Juglans is not 

 above rjuestion, although no betti^r disposition 

 of tliem has suggested itself. No extensive 

 new material has been collected and Hol'ick's 

 more comjilete figures have been re))roduced in 

 the present work. 



Occurrence. — Wilcox group, a quarter of a 

 mile above Coushatta, Red River Parish, La. 

 (collected l)y G. D. Harris) ; 2 miles south of 

 Nabortou and sec. 28, T. 13 N., R. 12 W., 

 Do Soto Parish, La. (collected by G. C. Matson 

 and 0. B. Hopkins). Bolivar Creek, 31 miles 

 north of Harrisburg, Poinsett County, Ark. (?) 

 (collected by L. W. Stephenson) . Grenada for- 

 mation, Grenada, Griaiada County, Miss, (col- 

 lected by E. N. Lowe and E. W. Berry). 

 Lagrange formation (in beds of Wilcox ago), 

 Puryoar, Henry County, Temi. (collected by 

 E. W. Berry), and WicklifTo, BaUard County, 

 Ky. (collected by R. H. Loughridge, U. S. Nat. 

 Mus. No. 2490). 



Collections. — U. S. National Museum: Now 

 York Botanical Garden. 



Juglans beruyi Knowlton. 



Juglayis rugosa. HoUick (in part) (not Lesquerouxl in 

 Ilarris, G. D., and Veatcli, A.(.!., A preliminary ro 

 port on the geology of Louisiana, p. 280, pi. 35. tig. 

 2 (not fig. 1), 1899] 



Juglans Berryi. Knowlton, U. S. Geol. Survey Prof. 

 Paper, MS. 



Dcscnption. ~Kuo\vlUm'> dcscrijition is as 

 f(dlows: 



Leaflets nienibranafeons in texture, the terminal lealiot 

 ovate, equal sided, broadest near the middle, whence it 

 narrows in about the same degree to both base and apex. 

 Margin entire, petiolule short, slender; secondaries 10 to 

 12 pairs, mainly alternate, considerably curved upward, 

 camptodrome; lat('ral leaflets larger, o\'ate-lanceolate, 

 strongly une(|Ual sided; margin slightly undulate; petiolule 

 slender; secondaries about 14 pairs, alternate, campto- 

 drome; nervillos mainly unbroken, oblique to the sec- 

 ondaries. 



This species is common in the Raton for- 

 ntatioii of Colorado, liicoinplctc specimens, 

 identical with the iiion^ jx'rfcct material from 

 Colorado, occur at scvi^ral localities within tlie 

 Wilcox fonnation. 



Occurrence. — Wilcox grouji, a cpiarter of a mile 

 al)ove Coushatta, Red River Parish, La. (col- 

 lected l)y G. 1). Harris) . Lagrange formation (in 

 beds of Wilcox age), WicklifTe, Ballard Count v, 

 Ky. (coUected by L. C. Glenn). 



Collections. — U. S. National Museum; New 

 Yorlv Botanical Gard(>n. 



Genus ENGELHARDTIA Leschen. 



EnGELHARDTIA (OrEOMIXXEA) JtlSSISSIPFIEN- 



sis Berry. 



riale XVII, figure 1. 



Engdhardlia mississippicnsis. Berry, Am. .Jour. Sci., 

 4th ser., vol. 31, p. 494, pi. 2, 1911; Plant A\'orld. 

 vol. 15, pp. 234-238, pis, 3, 4, 1912. 



Description. — Involucre large, trilobate, and 

 somewhat rofloxed. Alo3 widelj^ spread, the 

 angle between the median and lateral wmgs 

 being 70° to 80°. Sinuses coiTespondingly 

 open, rather straight sided, rounded at the 

 angle, which is 1.5 centimeters from the ex- 

 treme base of the specimen. The median 

 wing is the longest of the three and is equi- 

 lateral, spatulate or oblanceolate in outline, 

 expanding gradually distad from a basal width 

 of 8 millimet(^rs to a width of 13 millimeters, 

 where the distal portion is broken off, 5 centi- 

 meters above the base. Since this apical part 

 is missing, the total Length is estimated at 6.5 

 centimet(M's, which is a minimum rather than 

 a maximum estimate. Lateral wings slightly 

 inequilateral, the outer part of the lamina 

 b(>ing a tri(l(! wider than the inner. A]>ex 

 rounded. Length 5 centimc^tors. Greatest 

 width, whi(;h is above the middle, 11 millime- 

 ters. Least width proximad, 7 millimeters. 

 Primaries three in number, one median i)ri- 



