DESCRIPTION OF SPECIES— LONICERE^. 223 



The oldest tjpe of Vtb/inn/m is lliat of llie Lantanoides, represented in 

 tlic North American flora by V.Unttanoides, V.nwlk,i\\K\ V.dentatum. The spe- 

 cies here described are related to it, as is also tlie one described in Ihe Eocene 

 Suzanne Flora bj- Saporta, V. gigantrtnn, whose nilinit}- -with the plants from 

 Black Biittes is marked. Dr. Newberry has described, from the Tertiary of 

 the Union group, two species with small leaves. Their relation to this sec- 

 tion is less positive; they rather seem allied to V. iiuduvi, var. piirifoKum, of 

 the present North American flora. 



Viburnum uiarginatum, Leeq^. 



Plate XXXVII, Fig. 11 ; Plate XXXVIII, Figs. 1-5. 



Tiburniim marginalum, Lesqx., Annual Report, 1«7'2, p. 395 ; 187.3, p. 401 ; 1874, p. 306.— Sch., Pal. V^g^t., 

 iii, p. 601. 



Leaves of large size, petiolcd, broadly obovale, generally enlarged upward from the base and 

 round, subtruncate, short-pointed at the top, equally dentate from above the middle; basilar veins oppo- 

 site, oblique, ramified, as also their divisions, craspedodrome. 



Most of the leaves representing this species are large, some still larger 

 than that of fig. 1, all recognizable by a black border, not inflated, surrounding 

 them ; their consistence is rather thick, but not coriaceous. Broadly cuneate to 

 the petiole, and widely enlarged toward the middle or higher above it, ihey are 

 either nearly truncate and short-pointed, or rounded to a point. The borders 

 are equally dentate, with short, regular teeth, turned outside, separated by 

 shallow sinuses, and each entered by the points of the nerves or of their 

 divisions. The nervation is strong and very distinct, generally blackened like 

 tlie borders; the basilar veins, opposite from quite near the base, very oblique, 

 25° to i50°, branch three or four times outside, the branches dividing once or 

 twice, as also the other lateral nerves, and thus all the divisions enter one of the 

 teeth. The principal nerves are joined by strong nervilles at right angles, and 

 generally simple; the details of areolation are obsolete. Fig. 11 of pi. x.xxvii 

 is nearly entire, merely denticulate at the rounded top, and thus the branches 

 of the lower nerves are camptodrome. This is evidently a mere deviation 

 from the general type, as we see in figs. 1 and 2 of pl.xxxviii the same character 

 marked by (he tertiary nerves along the base as far up as it is entire. This 

 leaf has been described in the Annual Report, 1872, p. .'i96, as V. contortmn. 

 A deviation of another kind is marked in fig. 3, where the lower pair of nerves 

 do not branch, but which has the teeth entered by divisions of the nervilles. 

 Fig. 4 re^^iresents a leaf with a comparatively long petiole. The connection, 

 where it is broken below the base of the leaf, is not clearly seen; the petiole 



