ROSAl.ES. 



247 



gins entire. Petiohilc rrlativoly long, st(nit, 

 and curved, about 4 or .") iiuilimetcMs in leiigtii. 

 Midrib rather stout, nuicli curved. Seconda- 

 ries well marked, about six opposite to alter- 

 nate pairs, diverging at different angles, canip- 

 todrome. Tcrtiaries thiu Imt well marked, 

 rather straiglit, forming a relatively open a.reo- 

 lation. The lamina is aljout onc-tifth wider 

 on one side of the midrib, and the secondaries 

 are more ascending on the narrower side. 



Dalbergia is reiiresented by three species of 

 leaflets and a ]iod iu the Wilcox flora. The 

 present species is somewhat larger than the 

 other two Wilcox species of Dalbergia leaflets 

 and has more numerous and relatively stouter 

 secondaries, more prominent tertiaries, and a 

 much more inequilateral outline. It is readily 

 matched by the leaflets of some of the existing 

 species of Dalbergia. 



Occurrence. — Lagrange formation (iu beds of 

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

 (coUected Ijy E. W. Berry) . 



Collection. — U. S. National Museum. 



Genus D.4LBERGITES Berry, n. gen. 



This genus is proposed as a form genus for 

 leaflets which possess distinctive characters that 

 ally them with the genera of the sul)family 

 Dalbergicie witliout, however, showing charac- 

 ters that enable a decision to be reached in favor 

 of one genus to the exclusion of the others. 

 The name Dall)ergites is not intended to indi- 

 cate any closer botanic affuiity to Dalbergia 

 than to Pterocarpus or any other genus of this 

 subfamdy, which is my reason for proposing 

 this present name instead of DalbergiophyUum, 

 which is already in the literature. 



In the modern flora the subfaniily consists of 

 about 350 species in 27 genera, which are segre- 

 gated to form four tribes. Of these tribes the 

 Anomalie are exclusively African and not 

 known in the fossil state, but the other three are 

 largely American and tropical, and of these the 

 tribe PterocarpuiiB seems to be the one most 

 strongly suggested by the following species. 



Dalbergites ellipticifolius Berry, n. sp. 



Plate LIV, fiijure 10. 



Drucription. — Leaflets small, equilateral, and 

 eUiptical in general outline, the tip slightly 

 mucronate. Length about 3.75 centimeters. 

 Maximum width, midway between the apex 

 and the base, about 2 centimeters. From the 



point of greatest width the full entire margins 

 curve eveidy to the ape.x and th(> l)ase. Tex- 

 ture subcoriaceous. Petiolule al)scnt. Midrib 

 stout and straight, not prominent. Seconda- 

 ries thiu but well marked; six or seven pairs, 

 scai'cely differentiated from the tertiaries, 

 diverge from the midrili at angles of about 25° 

 to 30°, long ascending and but slightly curved, 

 cam])t<)dr()me in the marginal regicm, where 

 they can scarcely be distinguished in caliber 

 from the tertiaries. Tertiaries thiu but well 

 marked, the anastomosing veinlets forming the 

 cliaracteristic acutely angular areola? of this 

 fanidy. 



This species is readily distmguishable from 

 the other Wilcox species of Leguminosa'. It is 

 somewhat suggestive of Sophora, but the mu- 

 cronately pointed tip serves at once to differcn- 

 tiat<^ it, as does also the venation. It is some- 

 what like the extinct genus Pala'lobium Unger 

 of this subfamily, and also suggests certain 

 existing species of the genus Machan'ium Per- 

 soon, which comprises more than three score 

 species that are confined to the American 

 Tropics, though the genus is also recorded from 

 the European Tertiary. It may also be com- 

 pared with existmg species in the genera Dal- 

 bergia, Drepanocarpus, and Pterocarpus. 



Occurrence. — Grenada formation, Grenada, 

 Greiuxda County, Miss, (collected by E. N. 

 Lowe and E. W. Berry). 



Collection. — U. S. National Museum. 



Dalbergites ovatus Beny, n. sp. 



Plate LIV, figure 11. 



Description. — Leaflets relatively large, ovate 

 in general outline, widest below tlu'. middit! and 

 tapering upward to the gradually naiTowed, 

 eventually abruptly and obtusely pomted tip 

 and downward to the broadly cuneatc base. 

 Length about 7.5 centimeters. Maximum 

 width, in the lower half of the leaf, about 3.25 

 centimeters. Margins entire, slightly un- 

 dulate. Leaf substance thin. Petiolule lack- 

 ing. Midrib stout throughout, slightly curved, 

 longitudinally striated, apparently flat and not 

 prominent. Secondaries thin, scarcely visible 

 on the upper surfac-i^ of tlu> leaflet; about a 

 dozen pairs, scarcely diflerentiatcxl fi'om the 

 tertiaries, diverge from tlui midrib at irregular 

 intervals at angles averaging about 35°, pursue 

 an asccndiug but sliglitlv cin-ved cotn-se, and by 



