ADDITIONS TO THE FLORA OF THE WILCOX GROUP. 



19 



are exceedingly like the Louisiana fruits. 

 Without any pretense at citing records, atten- 

 tion may also be called to the Oinnamomurn 

 fruits recorded by Friedrich =8 from tbe Oligo- 

 cene and those recorded by Heer 29 from the 

 Miocene of Europe. 



Occurrence: Goss pit, half a mile east of 

 Mansfield, De Soto Parish, La.; collected by 

 O. M. Ball. 



Genus LAURINOXYLON Felix. 

 Laurinoxylon branneri Knowlton. 



Laurinoxylon branneri Knowlton, Arkansas Geol. Survey 



Ann. Rept. for 1S89, vol. 2, p. 256, pi. 9, figs. 8, 9; 



pi. 10, figs. 1, 2; pi. 11, fig. 4, 1891. 

 Penhallow, Roy. Soc. Canada Trans., 3d ser., vol. 1, 



p. 98, figs. 6-8, 1908. 

 Berry, U. S. Geol. Survey Prof. Paper 91, p. 314, pi. 



16, figs. 6-10, 1916. 



This species was described in previous reports 

 and doubtfully recorded from the Wilcox. It 

 occurs in the Claiborne of Arkansas and Texas, 

 according to the identifications of Knowlton 

 and Penhallow. 



A specimen from the Wilcox at Shreveport, 

 La. (No. 207), appears to be identical with the 

 type. It is rather indifferently preserved and 

 adds nothing to our knowledge of the species. 



Laurinoxylon wilcoxianum Berry, n. sp. 

 Plate XIII. 



Transverse section : Vessels single or in radial 

 pairs or triplets, rarely more, occasionally in 

 tangential pairs or excentric. Well distributed 

 but sparse, no zonal arrangement or diminu- 

 tion in size throughout the year, oval in cross 

 section, thin walled. Prosenchyma abundant, 

 the walls scarcely thickened. Xylem paren- 

 chyma abundant, showing a tendency to an 

 arrangement in tangential bands. Rays undu- 

 lating, one to three cells wide, full of gum. 



Radial section: Vessels full of tyloses, with 

 pitted walls. Rays varying in height from 2 to 

 18 cells; marginal cells square, about twice the 

 height and one-half the length of the central 

 cells, their horizontal and end walls with 

 numerous simple pits. Rays mostly full of 

 gum. A constant feature is the large vertical 

 series of ray cells running from one ray to 

 another. Prosenchyma thin, fusiform; no 

 markings or septation seen, although in speci- 



» Idem, p. 21.5, pi. 16, figs. 15, 16. 



29 Heer, Oswald, Flora tertiaria Helvetiae, vol. 2, pi. 91, fig. 8, 1866. 



mens from the Claiborne group that appear 

 to belong to this species the prosenchyma is 

 irregularly septate. Parenchyma about twice 

 as wide as the prosenchyma, abundantly sep- 

 tate; no pits seen in the "Wilcox material but 

 with numerous round pores in the Claiborne 

 material. 



Tangential section: Rays closely crowded, 

 2 to 3 cells wide, connected by uniserial stringers 

 of large rectangular cells, all full of gum. 



This species appears to be distinct from pre- 

 viously described forms. It is abundant in the 

 Wilcox but is usually rather poorly preserved, 

 having suffered much from decay before silici- 

 fication. Much better preserved material of 

 this species is present in the Yegua formation 

 of Texas and will be fully described and figured 

 in my account of the Claiborne and Jackson 

 floras. Sections have been cut from trunks 

 from the following localities: Half a mile 

 southwest (214) and 1 mile west (212) of 

 Naborton, De Soto Parish, La.; near Dabney 

 (242) , Montgomery County, Miss. ; Piney Creek 

 (238), 10 miles east of Bolivar, Hardeman 

 County, Tenn. All from beds of upper Wilcox 

 age except the last, which is probably middle 

 Wilcox. 



Order MYRTALES. 



Family COMBRETACEAE. 



Genus TERMINALIA Linne. 



Terminalia lesleyana (Lesquereux) Berry. 



Plate XV I, -figure 8. 



Ti rni in.alia radobojensis Heer. Lesquereux, U. S. Geol. 



and Geog. Survey Terr. Ann. Rept. for 1871, 



Suppl., p. 15, 1872. 

 Magnolia lesleyana Lesquereux, Am. Philos. Soc. Trans., 



vol. 13, p. 421, pi. 21, figs. 1, 2, 1869; Tertiary flora, 



p. 248, pi. 44, figs. 1-3, 1878; U. S. Geol. and Geog. 



Survey Terr. Ann. Rept. for 1871, Suppl., p. 14, 



1872. 

 Knowlton, U. S. Geol. Survey Prof. Paper 101, p. 



313, pi. 82, figs. 1, 2, 1917. 

 Terminalia lesleyana Berry, U. S. Geol. Survey Prof. 



Paper 91, p. 323, pi. 89, 1916. 



A large specimen of this species from Louisi- 

 ana is figured in the present paper. Since my 

 account of the Wilcox flora was published 

 Knowlton 3 " has given a very excellent ac- 

 count of the Raton flora. In that paper the 

 present species is transferred back to Mag- 

 nolia, although no reasons are given. I have 

 compared the fossil with a large amount of re- 



» U. S. Geol. Survey Trot. Paper 101, 1918. 



