T. D. A. Cocker ell— Descriptions of Tertiary Plants. 67 



assigned to Acer. As it presents some interesting characters, 

 and cannot be assigned with any degree of assurance to any 

 particular species known by leaves or fruits, I give it a sepa- 

 rate name. Peabody Museum, Yale, Cat. No. 1003. 



3. A Vetch Pod. 

 Phaca wilmattce sp. nov. Figure Id. 



Pod strongly inflated, broad-ovate in outline, 13 mm long and 

 10 broad, apparently thick, as preserved dark red-brown, 

 tipped with a thick strongly curved style about 3-| mm long, and 

 with a short thick stipe about 2 mm long, its union with the base 

 of the pod perfectly abrupt. Calyx very small. In the form 

 of the pod, this is more like P. longifolia (Pursh) Nutt., but 

 the pod being stalked, it is so far related to P. americana 

 (Hook) Pydberg. 



Hob. — Florissant, Miocene shales, Station 14 ( Wilmatte P. 

 Cockerell). I am indebted to Miss Alice Eastwood for calling 

 my attention to the affinities of this fossil. 



Peabody Museum, Yale, Cat. No. 1004. 



4. Miocene species of Hydrangea. 



In 1885 a supposed species of Marsilea, found in the Upper 

 Miocene beds of the John Day Basin, Oregon, was published 

 by Ward. Lesquereux, in 1888, observing that the plant was 

 certainly not a Marsilea, but represented a calyx of some 

 sort, referred it to Porana. In 1902, however (Bull. 204, U. 

 S. Geol. Surv., p. 60), Knowlton, following a suggestion from 

 Pollard, referred it to Hydrangea-, and this appears to be 

 certainly correct. 



Hydrangea has been reported to occur, with several species, 

 in the European Tertiaries ; but some of the species, at least, 

 are doubtfully of this genus. 



In addition to H. bendirei (Ward) Knowlton from Oregon, 

 two species have been found in the Miocene shales of Floris- 

 sant. One of these, H. subincerta, I have published in Bull. 

 Amer. Mus. Nat. Hist., 1908, p. 92 ; the other, more recently 

 found, is described herewith. 



Hydrangea florissantia sp. nov. 



Sterile flower large, the larger diameter about 21 mm ; sepals 

 nearly round, the larger about 10 mm long, the smaller about 9 

 (one of the smaller missing in the type) ; color as preserved 

 light brown, the centre of the flower dark ; venation distinct, 

 except peripherally, nearly as in H. bendirei. 



