P.OSALES. 



235 



csppci.ally as their common charactors of vena- 

 tion set them apart from all tlie other numerous 

 species of Wilcox Leguminosa>. A few of (lu'se 

 forms wiiieli are siniihir in outhn(> to some of the 

 varieties of the present sp(H'ics are the foUowinfi;: 

 Casfiia pur'/earcnsis Berry is suggestive of the 

 hirger ovate-hmeeoLxte form; Cassia wilcoxiana 

 Berry is simihir to the emarginate form, and 

 Cassia tenncssecnsis Berry antl Cassia faiiettoi- 

 sis Berry suggest tiie smaller lanceolat(> forms. 

 As previously remarked, however, and without 

 taking the space to enumerate tiu^ minor 

 differences, Cassia lowii has much more as- 

 cendingsecondaries and a well-marketl venation, 

 unlike all the species enumerated above. It 

 may be eojupared with a large number of rect'iit 

 species of Cassia. 



Occurrence. -^GreiVAd-.i formation, Grenada, 

 Grenada Comity, Miss, (collected liy Lowe iind 

 Berry). 



Collection. — U. S. National Museum. 



Cassi.v MissrssiPPiENsis Berry, n. sp. 



Plate LI, fi;„'tire,s 10 and 11. 



Description. — Pods short, wide, and com- 

 pressed, the peduncle stout a.nd tlie tip acu- 

 minate. Widest at or Ijelow the middle and 

 tapering somewhat distad, distinctly mar- 

 gined all around. Texture very coriaceous. 

 Veins transverse, very faint and immerseth 

 Length 3.5 to 4.5 centimeters. Maximum 

 width 1.6 to L8 centimeters. Seeds few ami 

 of large size. 



This species is clearly distinct from tlu- other 

 fornas of pods found in the Wilcox group, and 

 it therefore becomes necessary to give it a 

 specific name, although it probably represents 

 the fruits of one of the numerous species of 

 Cassia described from the leaflets. These pods 

 resemble souKnvliat those of Cassia wilcoxiana 

 Berry, but are wider, more regularly rounded, 

 more distinctly margined, more acuminates and 

 more coriaceous, and the venation is much less 

 prominiMit. 



Occurrence. — Grenada formation, Grenada, 

 Grenada County, Miss, (colhu'ted l)y E. N. 

 Lowe and E. W. Berry). Lagrange formation 

 (in l)cds of Wilcox age), li- miles wc^st of Grand 

 Junction, in Fayette Countv, Tenn. (collected 

 by E. W. Berry). 



Collection. — U. S. National Museum. 



Genus C^SALPINIA Linno. 



C.ESAi.rixiA wiLCoxiAx.^ Berry, n. s|). 



Plate L, figures 9-12. 



Description. — Leaflets (dli])tical in outline 

 and of difrei'(Mit sizes, ranging fi'om 1 to 12 centi- 

 meters in length and from 4 to 8 millimeters 

 in maxinnnn width at or below the middle of 

 the leaf. Apex slightly narrower than the 

 base, broadly rounded. Base rounded, slightly 

 ine(|uilateral. Margins entire and full. Tex- 

 ture coriaceous. Pet iolule stout, straight, as a 

 rule from 1.5 to 2 millimeters hi length. Mid- 

 rib stout and straight, impressed on the upper 

 side and ])rominent on the lower side of the 

 lealiets. Secondaries thin and mostly im- 

 mersed, eight or nine pairs, branching from 

 the midrib at a wide angle, camptodrome but 

 merghig in the tertiary areolation toward the 

 margin. A leallet of this species from Puryear, 

 which measures S millimeters in length, has a 

 petiolide 4.5 millimeters long. 



This species, though the specimens differ in 

 size, is rather uniform in outline and is readily 

 distinguished from associated forms of Mimosa- 

 ceu' and Ca'salpiniacea^ by its coriaceous tex- 

 ture, its Ca>salpmia venation, which is stronger 

 than in Mimosites, its relatively long petiolule 

 and its symmetric appearance, although tlie 

 lealiets arc really more or less inequilateral. 



The existing species of Cirsalpinia number 

 about two score forms of the Tropics of both 

 hemispheres, none of which reach the United 

 States except two or three species of the 

 Florida Keys which are often referred to the 

 allied genus Poinciuna Liime. The leaflets 

 of Cxsalpinia wilcoxiana can be closely matched 

 by those of scn'cral existing West Lidian and 

 tropical American species, for example, Csesal- 

 pinia bahamensis Lamarck, and this resem- 

 blance is so close that the present form is 

 referred without hesitation to the genus 

 Ca^salpinia and not to the somewhat less 

 definite form genus Ca'salpinites, which is used 

 for allied forms referable to the family (\esal- 

 pmiacea^, whose generic; affinity can not be 

 positively settled. 



Guppy ' discusses the. tluee oriental strand 

 species — C. nuga (Alton), C. honducella (Fleni- 



'Oiippy, H. n.. Observations of a naturalist in the I'aciflc, vol. 2. 

 Plant dispersal, p. 183, 1906. 



