POLEMONIALES. 



345 



lei, straight, craspedodroiuc, dix iTtiing iVdiii tlic 

 midrib at very wido angles in llie proximal 

 segment, more widely spaeed anil more .as- 

 cending in the distal segment. 



This species is based on the single specimen 

 figured, which was collected many years ago 

 1)V K. K. Call for tlie Arkansas Geological Sur- 

 vey. It came from Ihe clays of tlie Henderson 

 pit at Benton, Ark., long since worked out and 

 abandoned, so that the chances are against 

 lin(hng adcUtional material except from out- 

 crops not yet discovered. 



IL may be an anomalous l(>af, since marginal 

 irregularities are commonly observed in tlie 

 leaves of Nerium oleander Linnc, some speci- 

 mens suggesting by their outline the loljate 

 forms of the Mesozoic cycadopli^'te genus Nil- 

 sonia. A constricted leaf of ApocynophiiUum 

 tabiUanun is figured on the accompanying 

 plates. If tile constricted form be interpreted 

 as a variant from a normally entire ovate- 

 lanceolate leaf, it is stiU readily distinguish- 

 able from the Wilcox species Apocyni>/>]nilhim 

 wilcoxense Berry by its smaller size and rela- 

 tive shortness and breadth. 



Occurrence. — Wilcox group, Benton, Sahne 

 County, Ark. (collected by R. E. Call). 



Collection.. — U. S. National Museum. 



Genus ECHITONIUM Unger. 



EcHiTONiu^n LANCEOLATiiM Ettingshausen. 



Plate cm, figure 1. 



Echitonium lanceolafum. Ettingshausen, Beitriige zur 



Kenntiiiss der Tertiarflora Australiens: K. Akad. 



Wiss. Wien Denkschr., vol. 47, p. 134, 1883. 

 Lauriis rcussii. Heer (not Ettingshausen), Flora fossilis 



arctica, vol. 6, pt. 2, p. 12, pi. 3, fig. 14, 1880; idem, 



vol. 7, p. 105, pi. 77, figs. 1-7, 1883. 



Description. — The following description is 

 drawn from the material from Tennessee, 

 which has been referred to this species, which 

 differs in minor particulars from the leaf from 

 Greenland on whicli Etf ingsliausen based his 

 diagnosis: Leaves oblong-lanceolate in out- 

 line, more or less falcate, (he apex and l)ase 

 rather shortly pointed. Length about 11 

 centimeters. Maximum width about 2.1 centi- 

 meters. Margins entire, parallel for a consid- 

 erable distance me(hally. Texture subcori- 

 aceous. Petiole short and expanded, tumid 

 proximad, about 4 millimeters in lengtli. Mid- 

 rib stout and curved, becoming thin distad. 



Secondaries numerous, thin, al>out \2 sul)- 

 opposile to alternate camptodrome jiairs, di- 

 verging from tlie midrib at angles of 45^ or 

 more, ciirxing u])ward in the marginal region. 

 Tertiaries mostly obsolete. 



Ill ISSO Ileer identified a single small leaf 

 from (lie Eocene of Greenland as Laurus 

 reussii Eltingshaus(>n, a European species. 

 Ettingshausen three years later pointed out 

 that the form from Greenland was not identi- 

 cal with his Laiirtts reussii and redescrilx'd 

 fleer's species as Echitoniiim lanccolaiiiin. 

 The same year Heer published several addi- 

 tional figures of forms from (ireeiiland (hat he 

 identified as Laurus reussii. These are similar 

 to tlu' form that he described in 1880 but range 

 to a larger size, and these larger leaves with 

 short tumid jietioles are identical with the Wil- 

 cox leaves.' The smaller leaves from Green- 

 land were used by Ettingshausen in framing 

 his diagnosis of Ethitonivm lanceclatum. They 

 have longer petioles and fewer secondaries (ban 

 the larger leaves, but all are probaWj- variants 

 of a single species. 



The genus Echitonium was described by 

 Unger and contains from 8 to 10 species, 

 mostly European, ranging from the Paleoceiio 

 througli the Miocene. It is based on forms 

 comparable with the existing genus Echites 

 Linne, which embraces about two score species 

 of tropical America (West Indies and Antilles 

 and northern Souih America). 



Occurrence. — Lagrange formation (in beds of 

 Wilcox age), Purj^ear, Henry County, Tenn. 

 (collected by E. W. Berry). 



Collection. — V. S. National Museum. 



Order POLEMONIALES. 



Family BORAGINACE,®. 



Genus CORDIA Linne. 



CoRDiA EocENiCA BeiTy, n. sp. 



Plate CVI, figures 11 and 12. 



Description. — Leaves oblong-ovate in ou(- 

 Imo, the apex acute and the base broadly' 

 cun(vi(e or roundcul. Length ranges from 6. .5 

 to 10 cen(ime(ers. Maximum width, in the 

 lower half of (lu^ leaf, ranges from 2.8 to 4 

 centimeters. Petiole slioit and stout. Mid- 

 rib s(ou(. Secondaries thin, remote; six or 

 seven alternate pairs diverge from the midrib 



1 Compare pi. 103, fig. 1, of this paper with Hcer's pi. 77, fig. 6. 



