KHAMNALES. 



281 



Genus REYNOSIA Crisfbach. 



Reyxosia PR.EXfNTiA Jicrry, u. sp. 



Plates LX^■III. flirure 4, nml LXIX, fisruros 2 and :{. 



Description. — TjCiivcs iiicdiuni si/cd or smimU, 

 ohovate ia general outline, tlie ti|) Iji'oadly 

 rounded, and the base eniieate. Length ranges 

 fiDin 4.5 to 6 centinieters. Maxinnnu width, 

 m the middle part of the leaf, ranges from 1.5 

 to 2.5 eentimeters. Margins entire with a few 

 irregular undulations. Texture sulx'oriaceous. 

 The ty|)(5 and ligured s|)ecinuMi is slightly 

 iiiequilatcral. It continues its maxinmm width 



ascending course and are cam]>todrome close 

 to the margins. Tertiaries not ]irominent hut 

 distinct, rather straight and in the main nearly 

 at right angles to the midrih. Areohi? o])(>n, 

 tlu'(>e, four, or live sided. 



Tiiis species is very similar to the existing 

 sp(>cies of Keynosia indigenous iu the .\ntillean 

 r{\gion, one of which reaches the keys and coast 

 of southern Florida. It is also somewhat similar 

 to liatitdui pseudotenax Berry, described from 

 the near-])y Wilcox lo(;ality at Early Grove. It 

 did'ers iu its slightly larger she, bhmter ti]), 

 more parallel niargins, marginal sinuses, longer 



Figure 14.— Restoration i>f I'uliiirus anguslns lierry (Icavfs) and Paliurus mississippinixis Berry (fruits). (One-third natural size.) 



from the tip to the region well below the mid- 

 dle; there is a shallow sums on one siile about 

 1 centimeter below the apex and a similar one 

 on the ottuT side about 1.5 centimeters below 

 th(> a])ex, the nu\rgms being full. The petiole 

 is stout and ranges from 5 to 10 millimeters in 

 length. Miilrib stout and curved distad, 

 prominent on the lower surfac(^ of the letif. 

 Secondaries relatively thin, irrc^gularly spaced, 

 about seven to nine opposite to alternate pairs: 

 they diverge from the midrib at angles that 

 average about 45°, the basal oj>])osite ]>air 

 forminy: maririnal hems for a short distance; 

 all are slightlv l)ut regularlv curved i)i (heir 



petiole, stouter midrib, and more numerous 

 secondaries. The genus Reynosia comprises 

 four species which are confined to the Bahamas, 

 Antilles, and southern Florida, and the fossil 

 receives its name from its probable ancestral 

 relationshi]). Wood reseinl)ling that of the 

 existing litijnosid. si'pteiitrional.is Urban occurs 

 in the Claiborne group of Texas. 



TIk^ pres(>nfc fossil species is much like a part 

 of the materiid from the Tertiary of northern 

 South America (Colombia), which Engelhardt' 

 described as Sabicea asperifolia. 



1 Engelhardt, Hermann, Senokpnlirrgisohe naturl. Gesell. Abh., vol. 

 I'.i. p. 40, pi. 5, fiR. fi, 1S9,5. 



