FLORA OF THE WOODBINE SAND AT ARTHITRs BLUFF, TEX. 



171 



This description was based upon very frag- 

 mentary material horn the Atane beds of Green- 

 land, from which, nevertheless, Heer recon- 

 structed the supposed outline of the perfect 

 leaf. To judge by the specimens referred to 

 this species by Lesquereux and Newberry it 

 was an exceedingly variable form. In plan it 

 is trilobate, but the subsidiary lobes developed 

 upon both the median and the lateral lobes in 

 some specimens obscure this trilobate character 

 and suggest Oissifes parvifolhis Berry, of the 

 Albian of America and Europe; Cissifes 

 dentatolobatus Lesquereux, of the Dakota sand- 

 stone; Cissites panduratus Knowlton, of the 

 Vermejo, Mesaverde, and Ripley formations: 

 or Cissus vitifolia Velenovsky, of the Ceno- 

 manian of Bohemia. 



The primaries are stout and three in number; 

 they may diyerge from the top of the stout 

 petiole or be suprabasilar; in many specimens 

 the branches of the laterals approach so near 

 the base that the leaves have the appearance of 

 being palmately 5-veined. 



This species is conmion but fragmentary in 

 the Raritan formation; it ranges from 7 to 10 

 centmieters in length and from. 6 to 12 centi- 

 meters between the tips of the main lateral 

 lobes. The sinuses are all rounded, and the 

 main ones may be deep or shallow. The frag- 

 ment from Long Island referred to this species 

 by Hollick is, as he remarks, exceedingly unsatis- 

 factory and doubtful. The species occurs also 

 in the Dakota sandstone of Kansas, and a 

 closely related variety has been found in the 

 Magothy formation of Maryland. Typical 

 material is present in the Tuscaloosa formation 

 of Alabama. It is represented by a scanty 

 amount of incomplete material at Arthurs 

 Bluffs, Tex. 



The genus Cii-sifes was erected l)y Heer in 

 1866 for the species Cinsites insignifi, from the 

 Dakota sandstone of Nebraska, which present- 

 ed points of afFmity with the genus Cissus of 

 Linne. It is a largely developed type in the 

 upper half of the Cretaceous system but was 

 replaced aftei Eocene time by forms which are 

 definitely referable to modern allied genera 

 such as C'issns and Vitis. 



Order MALVALES. 



Family STEKCULIACEAE. 



Genus STERCTTLIA Linng. 



Sterculia lugubris Lesquereux? 



Plato XXXVI, fi>,'iirf (5. 



Slerculia biguhris Lesquereux, The Cretaceous an<l Ter- 

 tiary iSoras, p. 81, pL 0, tigs. 1-.3, 1883. 

 Berry. Torrey Bot. Club Bull.., vol. 39, p. ;VM), ].l. ;^>1, 

 fig. 2, 1912. 



Leaves variable in size, often large, deeply 

 palmately trilobate. Length from 12 to 24 

 centimeters. Texture coriaceous. Margins 

 entire. Base cuneato, decurrent. Lobes nar- 

 row linear-lanceolate, acuminate. Primaries 

 tlu'eo, stout, prominent, diverging from the top 

 of the thick petiole at acute angles. Second- 

 aries thin, camptodrome, mostly iimnersed in 

 the thick substance of the leaf. 



This striking species was described from 

 specimens collected in the so-called Dakota 

 sandstone near Golden, Colo. It is very similar 

 to Sterculia diffwoodi nsis Berry,-'* of the Mag- 

 othy formation of New Jersey and Delaware. 



This species is apparently represented at 

 Arthurs Bluff, Tex., by the single specimen 

 figured, which agrees very well with the Da- 

 kota sandstone forms of Sterculia lugubris. 

 The reference is queried, as the specimen may 

 represent an exceedingly slender, elongated, 

 almost parallel-margined form of Aralia well- 

 itKjioniana Lesquereux, which is so common at 

 this locality. 



Order THYMELEALES. 



Family LAUKACEAE. 



Genus BENZOIN Fabricius. 



Benzoin venustum (Lesquereux) Knowlton. 



Plate XXXVITI, figure 2. 



Lindera venusia Lesquereux, U. S. Geol. Siu-vey Mon. 17, 



p. 95, pi. IG, %s. 1, 2, 1892. 

 Benzoin venustum (Lesquereux) Knowlton, U. 8. Geol. 

 Survey Bull. 152, p. 47, 1898. 

 Berry, Torrey Bot. Cfub Bull., vol. 39, p. .399, 1912. 



Leaves of variable size, trilobate, separated 

 by narrow ultimately rounded sinuses about 



3« Berry, E. W.. Now York Brit, r.arden Bull., vol. 3, p. SS, pi. 4.3, fig. .5, 

 1903. 



