MALVALES. 



JS5 



or very broinlly ounoato. Lougth nbout l-S 

 ccutimotei-s. Maxiimini wiiltli. in the lowor 

 lialf of the loaf, about loutimotoi-s. Margins 

 entire, slightly nmlulate. Texture snbeoria- 

 oeous. Petiole not preservetl. Miilrib stout, 

 prominent on the lower surl'aee of the leaf. 

 Seeomlaries numerous, stout, prominent, and 

 subparallel: about V2 suhopposite to alternate 

 paii-s diverge from the midrib at angles between 

 35' and 40"": they are somewliat irregularly 

 spaeed. pui"sue a ratlier straight eoui"se. beeonie 

 more eurved and eamptodrome in the nnirginal 

 region, and extend rather elose to the margins. 

 Tertiaries tliin. pereurrent, almost entirely 

 obsolete. 



This speeies is based on the forms from Lou- 

 isiana whieh were referred by llolliek to lihani- 

 nus cleburni Lo.squereux.' whieh is an al>uudant 

 and variable form in the flora of the Denver 

 formation of Colorado. The present form is 

 long-pet ioled, more slender, laneeolate as a 

 rule, and has a narrower base, mueli tliinner 

 and nu>re eurveil seeondaries, and very elose 

 set, pereurrent tertiaries. The last feature is 

 invariably I'haraeteristie of the hundreils of 

 speeimeus eolleeted. 



Rhamnu^ coushatta is more pointed distad 

 and nu>re roimdeil proximatl than i\lminiiu< 

 itHinjiiKitus Lesqiun-eux ami has a tliinner mid- 

 rib and obsolete tertiaries. It. differs from 

 Rhainnuti coligniticus Berry in its larger size, 

 ovate ft>rm, broader base, and more numerous 

 and straighter secondaries, 



Ocninrnce. — Grenada formation, Grenada 

 County, Miss, (eolleeted by K. \. Lowe and 

 E, W. Berry"!. Wilcox group, oue-foiu'th of a 

 mile above Coushatta, Red Uiver Parish, La. 

 (colliH-tcil by Ci. l>. Harris); I mile northeast 

 of Koriolidc Churcli, oV miles soutlicast and 

 2 miles soutli of Nnborlou, IV Soto Barisli, 

 La. (collecteil by G. C. Matson and O. Iv 

 Hopkins). 



('olUrtioiiti. — I'. S. Xation.'il Museum (,No. 

 25SI): New York Botanical Garden. 



Crmis UH.VMMTKS Korbos. 



KnvMNi ii;s hkih ukmi vi-okmis Berry, n, sp, 



Plato I.XXl, liijuro 3. 



DfHCi-iption. — Leaves medium sized or rela- 

 tively small, ineipiilatcral in out[iiu>. widest in 

 the middle and poinleil at both ends, the ti|> 



I Ltw(|uereiu\, Leo, Tho TorUary Uora, p. 3S0, pi. M, llss. 1-3, ISTS, 



slightly narrower tlian the base. Length about 

 (i.o centimeters. Maximum width about 2.S 

 centimeters. Margins feebly undulate: the 

 undidations at times passing into remote ob- 

 scure crenations. particiUarly in the upper htilf 

 of the leaf. Leaf substance thin. Petiide not 

 prescrvtHl. Mitlrib thin, flexuous. Secondaries 

 thin, cainptodrome; about six suhopposite to 

 alternate paii-s diverge from the midrib at an- 

 gles of -K'i ~ or less; they sweep upward in long. 

 Hat, subparallel curves, becoming more curved 

 distad parallel witlx the marginal undidations 

 and close to them. As a ride, an outer branch 

 in their upper course diverges at a small angle, 

 connecting with the secondary next below. 

 Tertiary venation obsi>lete. 



This species is based on scanty material, only 

 a single nearly complete specimen (.the one 

 tigured^ being contained in the collections. It 

 is, however, entirely distinct from the other 

 members of Wilcox tlora and is clearly referable 

 to tlie Khamnaeea\ suggesthig among several 

 genera an allinity with the genus Beirhemia 

 Necker. which is commemorated in the specific 

 name. Because of the little material available 

 for study it is referreil to the form genus 

 Khainnites without any effort being made to 

 allocate it am*>ng the more or less convergent 

 genera of the l\hamnace;v. 



Occurrence. — Bods of Wilcox age, Calaveras 

 Creek, Wilson Cmmty, Tex. (collected by Alex- 

 ander DeusseiO. 



Collection. — U. S. National Museum. 



Oi-der MAX.VAUES. 



Fiuuily TILIACE^. 



Genus (iRKWU>l'SlS Saporta. 



GiJKWuU'sis TKNXKssKKN'sis Berry, n. sp. 



riuto 1;X1\', lisurt>si t soul ■> 



l>t\^cnption. — Leaves small or medium sized, 

 broadly elliptical in outline, the base truuwito 

 orslightly eordatv> and the tip narrowly pi>iiUt>il, 

 p.-ilinalidy five to sev(>n veined from the top 

 of the petiole, Loi\gth [ to S oeutimetei^. 

 Maximum width o.o tt> S centimeters in the 

 basid part of the li>af. Margin entire for a 

 greater or less tlistance i>n either side of the 

 petiole, gradually pjussing into a region of more 

 oi less prominent crcnate teeth, which teml 

 to becmne ol)solete in the apex of the leaf. 

 l\"liole long and relatively stout, '2 to Ji.o OvUi- 

 timeters in l.'iigth. Primaries five to seven 



