JURASSIC FLORA OF DOUGLAS COUNTY, OREG. 105 



Genus (TKXOI'IIYLLUM Schimp.T. 



ClKNorilYLMM ANGISTIFOI-UM l'"nnlain0. 



PI. XXII. 



ISOf). Cifnophylhim angustifolium Font.: Am. .lourn. Sci.. 4th s.t.. Vol. TI. j). 274 



(iiomen.). 

 lyOU. Cknophylhim nnguslifolhiii, Font.: Twentieth Ann. llep. U. S. Geul. Surv.. 

 1898-n'.t. I'l. II. ]). •".I'.O, pi. Ixiii. figs. 2, :i. 

 Ctenophnlhiiii (utgiistifoliii)» was found for tho first tiino in theOroville 

 flora, in which only two imperfect specimens were seen. This fossil is 

 quite al)undant in the Orefjon Jurassic flora at locality No. 2, where a 

 numl)er of fairly pood specimens were ol)tained. The characters made out 

 in the Oroville specimens are seen in those from Oregon. While the latter 

 are much larger, they do not show the bases and tips of any of the leaves, 

 which still remain unknown. The leaves must have had :i considerable 

 size, for fragments 8 cm. long were o))tained that indicate that, without 

 the petiole, they must have lieen at least L5 cm. long. The leaves seem to 

 have been oblong elliptical in form, narrowing to the base and apex. 

 The axis is strong. The leaflets seem to have had a different angle of 

 attachment according to their position on the leaf. They were, in th(> 

 basal portion, perpendicular to the tixis. In the higher i)arts they 

 become more and more inclined. They were usually somewhat falcate, 

 more so in the upper parts of the leaf. The leaf sul)stance was thick aiifl 

 dense. They are slightly expanded where the base is attached, and keep 

 their width unchanged to above the middle of the leaflet, then narrow 

 gradually to the t ip. They are very nttrrow and litiear in form. The tips 

 are obtusely rounded off. In the same position on the leaf they may vary 

 somewhat in width, a few being a little wider or narrower. Taking the 

 leaflets from the middle portions of the leaves for measurement, there is 

 some small variation in different leaves. The widest leaflets seen did not 

 have their ends preserved. They have a width of 3 mm. The narrowest 

 leaflets are only 2 nun. wide. The longest leaflet seen, probalily not 

 actually the longest, is fi cm. long and 2 mm. wide near the base. The 

 leaflets are rather remotely placed. The nerves are slender, and not 

 easily seen without the help of a lens. They are unbranched, attached at 

 the same angle as the leaflets, and about 5 in number. 



