6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 6<; 



Green River Eocene, Roan Mountains, Colorado, Station 1, near 

 head of Ute trail (Wilmatte P. Cockerell, 1922). 



H olotype. —C^i. No. 36856, U.S.N.M. 



It is impossible to prove that this is a Clethra, but it has that 

 appearance. The genus contains two living North American species, 

 and there is a species (6^. arborea Aiton) living in Madeira. 



The flowers of G. herendtii Caspary have been beautifully pre- 

 served in Baltic amber. C. lepidioides certainly shows much re- 

 semblance to the fossil Andromeda protogaea linger, but I do not 

 believe it is an Andromeda. The specific name is derived from the 

 superficial resemblance to Lepidium. 



Family ROSACEAE 



P0TENTILLA(7) BYRAMI, new species 

 Plate 2, fig. 9 



Calyx with four acuminate sepals, having an expanse, from tip 

 eto tip of 10.5 mm., the width of a sepal near base 2 mm., the sides 

 with a double curve free from hairs; corolla deciduous, absent: 

 stamens very numerous, at least 20, with rather stout filaments 

 about 1.8 mm. long and globose or subglobose anthers. 



Green River Eocene, Roan Mountains, Colorado, Station 11, 

 near top of ridge just beyond that on which is Station 1, on the 

 side facing the latter (John J. Bryam, 1922). 



Holotype.—Cat. No. 36857, U.S.N.M. 



This seems to agree well with those forms of Polentilla which 

 have sometimes been separated as Tormentilla^ on account of the 

 tetramerous flowers. The group is more characteristic of Europe 

 than America at the present time. Although the generic reference 

 remains somewhat uncertain, it is strongly suggested by the form 

 of the sepals, the quickly deciduous petals, and the character of 

 the numerous stamens. 



Family ALSINACEAE 



ALSINITES, new genus 



Plant small, tufted with crowded flovvers solitary on short 

 stems, apparently arising separately from the tufted caudex; 

 leaves apparently minute, not descernible; pedicels slender, 5 mm, 

 long or less; flowers narrowly campanulate, with tapering (not 

 abrupt or swollen ) base ; calyx with apparently five lobes, separated 

 about halfway to base, rather narrow, with somewhat obtuse 

 tips; corolla apparently absent; stamens ten, parallel, strongly 

 exserted, with well developed anthers; capsules globose, smooth, 

 with apparently mucronate apex. 



Type of the species. — Alsinites revel atus^ new species. 



