JIHASSIC FLORA OF DOrCiLAS COUNTY, ORECx. 5o 



an age different from tluit of the loealilies from wliicli larger collections 

 were made. 



In estimating the fitness of tlu'S(> collections to give an i(l(>a of the 

 flora of the time in which the slates were deposited, we must bear in mind 

 that we can not judge from the mere innnlier of specimens. The later 

 collections, which are by far the largest, were made under Professor Ward's 

 supervision, ;ind in part by himself. From this cause the collections con- 

 tain a much larger proportion of specimens showing different plants and 

 significant parts of plants than they would contain if made 1)>- one unac- 

 quainted with fossil botan>-. In the latter case a large percentage of the 

 specimens are duplicates that throw no additional light on the character 

 of the plant or else are very vague impressions that can not be determined. 



DESCKIITIONS OF THE SPECIES. 



Pliy It nil 13J^ YOPH^^T^. 

 Class HEPATIC.E. 

 Order MARCHANTIALES. 

 Family MARCHANTIACEiE. 



Genus MARCHANTITES Brongniart. 

 Mabchantites erectus (Bean) Seward?'' 

 PI. VI, Figs. 1,2. 



1864. Fucoides erectus Bean in Li'ckent)y: Quar. Journ. (leol. Soc. London, Vol. 



XX, p. 81, pi. xi, figs. ;ia, 3b (erroneously numbered 2a, 2b on the plate). 

 1S69. Tlalheris erectus (Bean) Schimp.: Pal. Veg., Vol. I, p. 185. 

 1898. Marclauitites erectus (Bean) Sew.: Fossil Plants for Students of Botany and 



Geology, p. 2.33, fig. 49 on p. 233. 



«I sliall follow, as nearly as practicable, in this paper the system of Adolph Engler, as contained in Die 

 natiirlichen Pflanzenfiiinilion of Engler and Prantl, continued by Engler since tlie death of Prantl, and 

 perfected in the latest edition of his Syllabus. The names of the several gi'oups, however, will not be in all 

 cases those of Engler, but will confonn to the new Code of Botanical Nomenclature adopted by American 

 botanists and published in May, 1904. In my first paper the Bryophyta, Pteridophyta, and S|)prniatopliyta 

 were called subkingdoms of the vegetable kingdom in general. The American code proposes the lerrn ' pliy- 

 lum" for these, conforming to zoological usage. — L. F. W. 



''Mr. Seward, in his .Jurassic Flora of the Yorkshire Coast, p. 49, includes in the synonymy of this species, 

 without questioning them, the Fncoides arcuaius of Ijindley and Hutton, published in 1837, and the Sp}i:'n>- 

 coccites arcualiis, which was the name given to tliis form by Presl in 1S3,S, and takes up for a specifi<- name 

 the Fucoides erectus of Bean, figured by Lcckenby in LStil. If the Fucoides tiri-nalu.s is the same as tlie 



