254 



LOWEE EOCEXE FLORAS OF SOUTHEASTERN NORTH AMERICA. 



the Wik-i>x llora. It diflcrs from i'ahiJa pur- 

 yearensis Boitv, the one that it most resembles, 

 m its narrower form, thicker leaf substance, 

 more obsolete venation, more numerous sec- 

 ondaries, and shorter petioh'. Ccdrela missis- 

 sippunrnti BeiTV, another Wilcox species, is 

 not Ukely to be confused with tiie present form, 

 smce it is a larger, slightly inequilateral leaf, 

 widest proximad, and has a coarse ]irominent 

 venation. It resembles somewhat certain Wil- 

 cox species of leaflets of CiesalpmiacetB and 

 Mimosacese. 



The genus Cedrela is no longer rejircsented 

 in the United States, its nine or ten existing 

 species beuig confined to tropical America, 

 mostly on the mainland. Unger many years 

 ago described two species of Cedrela {C. eiiro- 

 ptea and C radobojana) from the Miocene of 

 Radoboj in Croatia. The supposed rutaceous 

 Protamyris radobojana ' of Unger is also refer- 

 able to Cedrela, according to Ettiiigshausen,^ 

 who enumerated but never described Cedrela 

 primigenia from the Eocene of Alum Bay, 

 England (Ypresian). 



Occurrence. — Holly Springs sand. Holly 

 Springs, Marshall County, Miss, (collected by 

 E. W. Berry). Lagrange fonnation (in beds 

 of WQcox age) , Puiyoar, Henry Comity, Tenn. 

 (collected by E. W. Berry). 



Collections. — U. S. National Museum. 



Cedrela mississippiensis Berry, n. sp. 



Plate LV, figure b. 



Description. — Leaflets small, ovate-lanceo- 

 late hi outline, the apex somewhat abruptly 

 pointed and the base rounded, decidedly in- 

 equilateral. Length about 4.5 centimeters. 

 Maximum width, at a pomt beh)W tlie middle, 

 about 1.1 centimeters. Margins entire, regu- 

 larly and fully rounded. Texture coriaceous. 

 Petiolide not enlarged, about .3 to 4 millimetei-s 

 in length. Midrib very stout, curved, very 

 prominent on the lower sm-faco of the leaflet. 

 Secondaries stout, prominent on tlie lower sur- 

 face, somewhat unequally spaced and irregu- 

 larly ciu-\'<h1; about eight pi'ovaLlingly alter- 

 nate pairs diverge from the midrib mostly at 

 wide angles, 60° t(j 80°. They are rather 

 straight at first and then shai-ply oiu-ved up- 

 ward to fonn camptodrome arches subpurallel 



' Unger, Franz, Sj-Uoge plantarum fossilium, pt. 1, p. 47, pi. 21, fig. Hi, 

 1859. 

 SEttingshausen, C. von, Roy. .See. London Proc, vol. 30, p. 235, 1.SSO. 



with tbe margins. Tertiaries relatively jiromi- 

 nent, formhig smaU margmal arches and in- 

 tern;il three, four, or five sided relatively large 

 meshes. 



This is larger than the preceding Wilcox 

 species of Cedrela, and is readily distinguish- 

 able from the otliers by the characters already 

 enumerated. It is more hke a leaflet of the 

 Ciesalpiniacete than either of the other small 

 species, and greatly resembles several Wilcox 

 species of C:esalpinites, to which, however, it 

 is believed to be imrelated, as it is certainly 

 pw-fec'tly distinct. It is much like the exist- 

 ing Ccdrela fissilis Velloso of northern South 

 America. 



Occurrence. — Holly Springs sand. Early 

 Grove, Mai-shall Coimtv, Miss, (collected by E. 

 W. BeiTv). 



Collection. — U. S. National Museimi. 



Cedrela pltryearensis Berry, n. sp. 

 Plate LVI, figure 2. 



Description. — Leaflets small, lanceolate in 

 outline, the apex narrowed, acute, and the base 

 somewhat rounded, i)ointed, and e([uLlateral. 

 Length about 3.5 centimeters. Maximmn width 

 in tlie middle part of the leaflet about 1 centi- 

 meter. Marguis entire. Texture coriaceous. 

 Petiole relatively long and stout, about 7 miUi- 

 meters in length. Midrib stout, curved, and 

 promment. Secondaries thm, about five, dis- 

 tant, subopposite pairs; they diverge from the 

 midrib at wide angles and may be straight at 

 first, but as a ride curve slightly upward to a 

 point about two-thirds of the distance to the 

 margin, where the curvature is rapidly accel- 

 erated to fonn wide camptodrome arches sub- 

 parallel with the lateral margins. 



The figured specimen of this spoci<*s has a 

 large insect gall at the top of tiui pi^tiolule, 

 which has caused some abnormality, but not 

 enough to obscure the essential characters of 

 the leaflet. It was chosen for illustration in- 

 stead of a perfectly normal leaflet, since the 

 gall adds an item to our knowledge of the Wil- 

 cox biota. 



This species is somewhat similar to Cedrela 

 wilcoxiana Berry, but is larger, ri^lativoly as 

 well as actually wider, thinner, and has fewer 

 secondaries and more prominent venation. It 

 differs from Cedrela mississi]>]>ier}sis BeiTy ux 

 its smaller size, eiphlateral lanciiolate form, 

 longer petiole, and less stout venation. 



