JUKASSIC FLORA OK DOlCiLAS COUNTY. OKE(;. 107 



forkiiifi was seen in the nerves; in the lower ones a nerve oceasionally 

 forks ai)ove the point of insertion. 



IM. Will, I'i^. 1, gives a consichM'ahlc poi't ion of llie upper pai-t of a 

 leaf with ol>rK|uely place<l leallets. l''if>:. 2 represents a fragment of tlie 

 basal pari of a leaf containing the basal portion of some remote, nari'ow 

 leaflets. Fig. :i shows a similai- pai't of a leaf carrying the basal parts 

 of several larger and more closely placed leaflets, fig. 4 shows two of 

 these leaflets enlarged. 



The plant is rare eveiywhere. It is most conmion at localities 



Nos. IS and 19. 



CtENoI'IIVLU'M WaK'DO Fcillt:iill('. 



PI. XXIIl. Fi-s. .-, 1_>. 



iSDf). CUnophjnumVt'drd'ii Font.: Am. -louni. Sci., Itli scr.. Vol. II, p. --'74 (iioiihmi). 

 1<)()(). Ctenophylhii,, Wnnlil Font.: Twcntirlli .Vmi. \U•\^. V. S. (icol. Surv., 1S'.)S !((). 

 Pt. II. p. ;!")7. pi. li-\; pi. Ix; 1>1- 1-^vii, lig. :>. 



A considerable numi)er of specimens of a plant that agrees well with 

 Ctenophyllum Wnnlii were found at some of the Oregon localities. The>- 

 are ver>' fragmentary, and do not compare with the fine specimens found 

 in the Oroville flora. Nearly all the specimens are fragments of unat- 

 tached leaflets, pooi-l\- preserved. The midrib indicated on the Oregon 

 plants seems wider than that seen in the Oroville specimens, for one shows 

 a width of 5 mm. The leaflets have about the same range in width as 

 those of Oroville. The widest have a width of about 2 cm. and the nar- 

 rowest aljout I cm. The nerves are numerous, fine, and closely placed. 

 Thev are prominent, and not immersed in the leaf substance, but stand out 

 like threads. The\- fork mostly at their base, and sometimes, but rarely, 

 hio-her up. Some are single. Very rarely an anastomosis may be detected, 

 l)ut it is clearly not an essential feature. 



I'ig. o shows parts of several leaflets evidently once united to a com- 

 mon midrib, and Figs. 6 and 7 are enlargements of two of these. Fig. 8 

 includes portions of two lai'ge leaflets, probably of their middle parts. 

 V\g. 9 gives part of a small leaflet. Fig. 10 shows part of a midrib and 

 several attached fragments of leaflets shown on only one side of the midiib. 

 Fig. 1 1 shows a fragment of the upper part of a leaf with portions of several 

 leaflets attached. Fig. 12 is an enlargement of Fig. 1 1 . 



It occurs at localities Nos. 1, 2, 7, 11, 17, and 19. 



