DESCRIPTION OF SPECIES. 127 



1250 of the Snow collection, is comparable in size, form, etc., to Nyssidium 

 grwnlamJicum Heer (Fl. Foss. Arct., vol. 3, pt. 3, PI. ii, Fig. IS). 



Habitat: Ellsworth County, Kansas. No. 935 of the collectiou of the 

 University of Kansas; E. P. West, collector. 



Order ARALIACE^. 

 Tribe HEDERE^E. 



Hedera cretacea, sp. uov. 

 PI. XVIII, Fig. 1. 



•Leaves subcoriaceous, broadly rhomboidal in outline, obtusely trilo- 

 bate, subcordiform at base; borders undulate between the lobes, entire 

 downward, nervation palmately five divided from the base; lower primary 

 nerves simjde, short and thin, the upper thick, passing up to the point of 

 the lobes, branching on the lower side and forking; secondaries four pairs, 

 opposite, short, equidistant, and parallel with the upper primaries. 



The only leaf seen of this species is 7"'" long, <S.5'"" broad between the 

 points of the lobes, which are short and obtuse. The lower secondaries are 

 thick, forking at the apex and becoming effaced before reaching the borders, 

 being, however, apparently cauiptodrome like the branches of the primaries. 



The species has points of relation first with the living H. Helix L., by 

 its form, being, however, less deeply cordiform at the base, and by its nerva- 

 tion, which is five-nerved from the base in the living species, which has also 

 four pairs of opposite secondaries, all dividing before reaching the borders. 

 Of fossil species this leaf is related to II. Strozzil Gaud.,^ of the Miocene; 

 to H. auriculata Heer," with, however, a marked difierence in some of the 

 characters. 



Habitat: Ten miles northeast of Delplios, Kansas. No. 4020 of the 

 collection of Mr. R. D. Lacoe. 



Hedera microphylla, sp. nov. 

 PI. XVIII, Figs. 2, 3. 



Leaves broadly rhomboidal, obscurely tril()l)ate, i)almatelv trinerved 

 from the base, obtuse and obtusely undulate-lobate above; secondaries two 



'Gaudin et Strozzi, Coiifrib., pt. 1, Feuilles ile la Toscane, p. 37, Pl, xii, Figs. 1-3. 

 »F1. Foss. Alask., p. .36, PI. IX, Fig. 6. 



