DESCRIPTION OF SPECIES. 207 



LiRIODENDRON INTERMEDIUM Lesq. 

 PI. XXV, Fig. 5. 



Cret. Fl., p. 93, PI. xx, Fig. 5; Cret. and Tert. Fl., p. 74, 



Leaves large, narrowly bilobate at the base, deeply emargiuate by tlie 

 upward direction of the upper borders, forming oblong, lanceolate obtuse 

 lobes far distant from the lower ones. 



Of tliis species, which as yet is not sufficiently known, a second speci- 

 men has been obtained representing, like the fii'st described in Cret. Fl. 

 (loc. cit.), merely tlie U})})er j)art of a leaf The space between the upper 

 and lower lobes is long, and thus the sinuses which separate them are 

 scarcely observable, though at its base the specimen shows an evidently 

 enlarging part or the origin of a lobe apparently large and at right angles. 

 The secondaries are less distant than in L. ■semlakdHm and are caiiiptodrome. 



Habitat: Two and one-half miles from Glascoe, Kansas. No. .504 of 

 the Museum of Comparative Zoology of Cambridge, Massachusetts. 



LmiODENDRON ACUMINATUM Lcsq. 



PI. XXVII, Figs. 2,3. 

 Cret. and Tert. Fl., p. 74; Bull. Mus. Comp. Zool., Cambridge, vol. 7, pt. 6, 1881, p. 227. 



Leaves smaller, about half as large as those of L. (/iffantciim, cut later- 

 ally into two pairs of nan'ow, linear, acuminate lobes. 



The leaves, which are not coriaceous, though thickish, are rounded or 

 truncate at base; the lobes, diverging 40° to 50° from the median nerve, 

 10"" to 12™" broad, 5"" to 7"" long, are separated l)y long or broad sinuses; 

 the upper ones are shorter than the lower, each traversed in the middle by 

 a strong craspedodrome secondary nerve with a second thin and camjito- 

 drome nerve near the basal border. None of the nerves are branching; no 

 nervilles are distinct. 



Habitat: Two miles south of Glascoe, Kansas. Nos. .504a and 508 of 

 the Museum of Comparative Zoology of Camljridge, Massachusetts. 



LiRIODENDRON ACUMINATUM Var. BILOBATUM H. var. 



PI. XXVIII, Fig. 4. 



Leaves of the same character as those of the normal form, differing by 

 the lower lateral loljes being cut to the middle into two obliquely diverging, 

 lanceolate, obtusely pointed lobes. 



This form, which was originally considered as a species, is really a mere 

 variety of L. acuminatum, from which it differs by the subdivision of the, 



