KANALES. 



215 



MarjnoUalanccolala. Ilrillirk iimt I.nsc)ueroux\ in Harris, 

 G. D., and W-ulrli. A. ('., A jirt'liminary ri'])i)rt mi 

 the Keiilcisy of Louisiana. ]i. 281', j)!. 40, 1S!)9. 



Dfscrijitioii. — Leaves Inrire, laueeolati^ in 

 general outline, with a pointed tip and a nar- 

 rowly cuneate, sliglitly decuri-ent i)ase. Leno;fli 

 ranges from 1!) to 'M) centimeters. M;i\inunn 

 width, al)0ut midway i^ctween tlie apex and 

 tlie base, ranges from 5.25 to 7.5 eentimelers. 

 Marginscntire. Texturesnheoriaeeous. Pel inle 

 stout, its wiiolo length not ])resei-ved. Midi'ih 

 stout and straight, prominent on tlie lower sm-- 

 facc of the leaf. Secondaries i-elalively thin, 

 remote, al)out 10 op|)osit(i to alternate pairs. 

 They diverge from the midrih at angles of about 

 50°, curving u])war(l somewlial al)rnptly two- 

 thirds of the distance to tlie margin, and ascend- 

 ing along it in a camptotlrome manner. 



This fine largo species was described by 

 Newberry in 1SS'_', but not figured, the only 

 pulilished figure being the lower half of a leaf 

 from the type locality at Fishers Peak, N. Mex. 

 (Raton formation), identified by Lesquereux 

 four years earlier as Magnolia (itt< niuitn Weber. 

 It is obviously distinct from that species. Its 

 occuiTence in the Wilcox flora is thus far limited 

 to the large specimen from Coushatta identified 

 by HoUick as Magnolia lanceolata Lesquereux,' 

 a single nearly complete leaf from Puryear, 

 Tenn., collected by me, mid fragmentary speci- 

 mens from the vicinity of Nabortou, La. 

 Though the general form and size are similar 

 to J\Iagnolia lanceolata the two are perfectly 

 distinct. Magnolia angustifolia has much 

 fewer secondaries, at a different angle of diver- 

 gence and curving upward more abruptly in 

 the marginal region. It is also more lanceolate 

 rather tiian oblanceolatc. It is a form al^un- 

 dant in the recent Lee collections from tlu? 

 Raton region of New Mexico, which have been 

 described by Knowlton, and adds another link 

 in the correlation of the Rocky Mountain lower 

 Eocene with that of southc^astern North 

 America. 



Occurrence. — Wilcox group, Coushatta, Red 

 River Parish, La. (collected l)y G. D. Harris), 

 and 2 miles south of Xaborton, De Soto Parish, 

 La. (collected by O. B. Hoj)kins) . Lagrange for- 

 mation (in beds of Wilcox age), Puryear, Henry 

 County, Tenn. (collecteil by E. W. Bim-iw). 



Collections. — U. S. National Museum: New 

 York Botanical Garden. 



' Lesquereux, Leo, Mus. Comp. Zool. Mem., vol. e, no. 2, p. 24, pi. r,, 

 ng. 4, 1878. 



Maonoi.ia i,ef,i Kn<iwllon. 



Plalo XMII, fiuurcs 1 au.l 2. 



ifiK/iioliii Lrii. KriMwllnn, U. S. (icol. Survey I'ruf. 

 Paper (MS. I. 



Dt.'irription. — Leaves medium sized to large, 

 ranging from 13 to 30 centimeters in length and 

 from 5.5 to 8 centimeters in maximum width, 

 the larger leaves lieing relatively much nar- 

 rowei- than tiie smaller leaves. Tlie maximum 

 width of most (if the material is very close to 

 7 eeuliinelers. There is considerable difi'er- 

 ence in tlie form of the leaves. The shorter are 

 slightly obovate in general outline, the maxi- 

 mum width being just above the middle. 

 From tiiis point tiio fully rounded lateral mar- 

 gins (■urv(^ slightly inward proximad to the 

 gradually narrowed and decurrent base; distad 

 tiiev curve inward somewhat more abruptly and 

 are tluMi more or less greatly extended and 

 acuminate. The larger leaves are more nearly 

 oiilong-lanceolate in outline, for though the re- 

 gion of maximum width is still above the middle, 

 it is distinguished by the narrower form of the 

 leaf and the nearly equal narrowmg of the apex 

 and the base. Margin entire, but as a rul(^ 

 slightly undulate, its shallow waves following 

 closely the distal bowing of the camptodrome 

 secondaries. Texture relatively thin for such 

 large leaves, apparently stiff but not at all merit- 

 ing the term coriaceous. Petiole short and stout. 

 Midrib stout, somewhat curved in all the mate- 

 rial examined, prominent on the lower surface of 

 the loaf. Secondaries relatively thin and dis- 

 tant for leaves of this size, prominent, 8 to 15 

 pairs, ranging in position from alternate to sub- 

 opposite, branching from the midrib at angles, 

 ranging from 55° to 62° in the median region 

 of the leaf, from 43° to 63° in the distal region, 

 and from 46° to 67° in the proximal region. 



The spacing of the secondaries at their origin 

 fi'om the midrib ranges from 14 to 26 milli- 

 meters in the median region of a single speci- 

 men. Whore the interval is wider an un- 

 usually large tertiary branches from the mitl- 

 rib in the upper half of the space, at a wider 

 angle than the secondaries, and runs witii but 

 slight curvature to tlui lower secondary. The 

 secondaries are all regularly curved upward, 

 arching along and close to the margin, eventu- 

 ally and finely camptodrome. Tertiaries, with 

 the exception of th(> eidargeil ones just de- 

 S(;ribed, very thin, largely percurreut. 



