76 MESOZOIC FLORAS OF UNITED STATES. 



-Phillips" gives a figure, with no description, of a singular plant 

 that he calls Sphenopteris Jugleri.'' This, in general aspect, agrees so 

 well with one found in two specimens, one each at localities Nos. 2 and 

 7, that I think the}' belong to the same species. The Oregon plant 

 has apparently no foliage, but is composed of a thread-like stem, which 

 was probably succulent, as no vascular tissue shows in it. This rachis 

 branches in an irregular straggling manner, widely diverging after each 

 branching. It bears, irregularly placed, short branches, or contracted 

 pinnules, that sometimes are forked and sometimes single. Their 

 summits are expanded into elliptical forms, so that the branch is club- 

 like in shape. No nerves are visible. Each expanded tip contains a 

 rounded body, depressed in the center, that looks much like a sorus. 

 The preservation is not sufficient to show its true nature, but, if it is a 

 sorus, it probably had an indusium. This plant much resembles Schenk's 

 Acrocarpus cunealus,'' from the Rhetic, but the segments are much 

 smaller than those of that plant. 



PI. XII, Figs. 4 and 7 give different fronds; the latter is a small 

 fragment, but more distinct. Fig. 5 gives an enlargement of a portion 

 of Fig. 4, and Fig. 6 a pinnule still more enlarged. Fig. 8 shows a por- 

 tion of Fig. 7 much enlarged. 



Genus ADIANTITES Goppert. 



Adiantites Nymphaeum Heer? 



PI. XII, Figs. 9-11. 



1876. Adiantites Nympharmn Heer: Fl. Foss. Ai-ct., Vol. IV, Pt. II (Jura-Fl. 

 Ostsibiriens) , p. 9.3, pi. xvii, figs. 5, 5b. 



Ver}' imperfect specimens were obtained, one each from localities 

 Nos. 2, 7, and 19, of a plant that resembles Heer's Adiantites Nympha- 

 riim. The pinnules are always too much mutilated to show their true 

 form, and only small bits of ultimate pinnse were obtained. All that 



"Geology of Yorkshire, 3d ed., p. 218, lign. 40. 



f> Professor Fontaine, before receiving the text of Mr. Seward's Jurassic Flora of the Yorkshire Coast, 

 was inclined to identify the Oregon plant with Sphenopteris Jughri Ett. on the strength of its resemblance 

 to Phillips's figure, but in view of the fact that Mr. Seward sa3's (p. 133) that this figure "does not do justice 

 to the original," and also because Mr. Seward refers all the plants called Spkenopteris Jugleri Ett. to Rujfordia. 

 Gmpperii, it was decided that our plant must belong to that species. — L. F. W. 



<^ Foss. Flor. der Grenzschichten, pp. 134, 135, pi. xx, figs. 9-12. 



