ROSALES. 



237 



Occurrence. — La,ffrani];(^ forinatidii (in beds of 

 Wilcox age), Piiison, Madison County, Tenii. 

 (collected by E. W. Berry). 



Collection. — U. S. National Museum. 



C/ESAi.PixiTES BENTONEX.sis Berry, n. sp. 



Plate I., fimire 1). 



Deficnption. — Leaflets elli]itical in general 

 outline, the ajiex sharply emarginate and the 

 base romided or broadly jxiiiitcd. Margins 

 entire, slightly nnilulate. Texture coriaceous. 

 Length about .3 centimeters or slightly less. 

 Maximum width 1..5 centimeters, in the l>asal 

 half of the leaflet. Apical ears directed up- 

 ward, rather unifonul}- and broadl}' rounded. 

 Midrib stout and straight. Secondaries tliin, 

 ascending, camptodrom(>, insensibly merging 

 into tlie tertiary areolation in th(> u])per part 

 of the leaflet. Tertiaries form small arches in 

 marginal region. 



This species is unfortunately l)ased on the 

 single incomplete fragment figured, and were it 

 not for its striking unlikeness to the other 

 membei's of the Wilcox flora it would be unsafe 

 to form the basis of a new species. It resem- 

 bles a number of recent species of Cfesalpinia 

 and also the fossil fonu described by Heer as 

 Tephrosia europsca} It is not unlike some of 

 the forms of Podogonimn lyellianvm Heer.- It 

 may be distinguished from Dalbergia, Colutea, 

 Bumelia, Sapotacites, and other genera with 

 retuse or emarginate tips, not only by the vena- 

 tion but by its being narrower distad than 

 proximad, whereas these genera have leaves or 

 leaflets wliich arc usually narrowly pointed at 

 the base and widest above the middle. 



Occurrence. — Wilcox group, Benton, Sahne 

 County, Ai-k. (collected by R. E. Call). 



Collection. — U. S. National Museum. 



C^SALPiNiTEs MississiPPiExsis Berry. 

 Plate L, figure 16. 



Description. — Leaflets ovate-lanceolate in 

 outline, the base broadly rounded, nearly 

 equilateral, sessile, and tlie apex narrowed and 

 bluntly rounded. Length about 2.2 centi- 

 meters. Maximum width about 8 millimeters, 

 in the basal luiK oi the leaflets. Margins entire, 

 regularly and fuU curved. Texture coriaceous. 

 Midrib stout, prominent. Secondaries thin, 



' Heer, Oswald, Flora tertiaria Helvetioe, vol. 3, p. lol, i>l. 133, figs. 

 1-3, 1859. 

 2 Idem, p. 117, pi. 130, ngs. 22-52. 



about H) pairs, branching from the midrib at 

 angles of about 45°, curving upward, campto- 

 drome, more or less merging with the fine \n\i 

 distinct tertiary areolation. 



Tliis species closely resembles the larger 

 leaflets of Csesalpinia 'irilco.riana Berry, l)ut is 

 narrowed upward and also unlike that species 

 in the a1)sence of a petiolule. It may be com- 

 pared witii a number of very similar fossil and 

 existing species of Acacia, Ciesalpinia, ilimosa, 

 and allied genera. 



Occiirrcncc. — HoUy .Springs sand, HoUy 

 Springs, Marsliall Countv, Miss, (collected by 

 E. W. Berry). 



CoUcction. — V. S. National Museum. 



C.ESALPIXITES (PaRKIXSOXIA ?) ACULEATAFOLI.V 



Berry, n. sp. 

 Plate L, figure 15. 



Description. — Leaflets small, equilateral, and 

 scssQe or minutely petiolulate, obovate-lance- 

 olate in outline, the apex broadly rounded and 

 the base somewhat narrowed and pointed. 

 Length 5 or 6 millimeters. Ma.ximum width 

 about 2.5 to 3 millimeters, above the midcUe. 

 ^Margins entire. Texture subcoriaceous. Mid- 

 rib relatively stout, curved, prominent on the 

 under side of the leaflet. Secondaries for the 

 most part merged with the tertiary areolation 

 and indistinguisha])le from it. Two or three 

 pairs of secondaries stand out slightly as 

 ascending, gently curved, and camptodrome. 



This species is the smallest form thus far 

 known from the Wilcox flora and is clearly dis- 

 tinct from the associated species of Cjesal- 

 piniacese or Mimosace?e. Though much smaller 

 and relatively shorter and broader, it suggests 

 Mimosites spatulatus Berry of the overlying 

 Claiborne group. Among Recent forms it 

 suggests the leaflets of Parkinsonia, especially 

 ParMnsonin aculeata Linne, the so-called horse 

 bean, so widely planted tlxroughout the West 

 Indies and other tropical countries and in- 

 digenous in low moist spots from the lower Rio 

 Grande to Lower California. 



The genus Parldnsonia contains only three 

 or four existmg species in the warmer parts of 

 North America and South Africa. I am only 

 acquainted with one fossil form, Parkinsonia 

 recta Laurent ^ from the Tongrian of France. 

 The leaflets of tliat species are very similar 



' Laurent, Louis, Flore des calcaires de C^las, p. 140, pi. 14, figs. lSi-21, 

 1899. 



