RYDBERG: NOTES ON ROSACEAE 331 
Adenostoma sparsifolium Torrey. This was originally de- 
scribed under the form ‘A. sparsifolia."” The name Adenostoma is, 
however, neuter. The species may perhaps represent a distinct 
genus as the throat of the hypanthium lacks the fleshy glands, 
characteristic of the type species. 
COLEOGY NE 
This genus was included in Cercocarpeae by Focke in Engler 
and Prantl’s Pflanzenfamilien, but evidently erroneously so. The 
tribe Cercocarpeae in that work was a very unnatural one, com- 
posed of five genera. Purshia and Chamaebatia evidently belong 
to Dryadeae, notwithstanding their solitary carpels. Adenostoma 
and Coleogyne represent distinct tribes, which leaves Cercocarpus 
alone in the tribe. In Coleogyne the ovule and seeds are inserted 
at the distal end of the ovary and pendent, in Dryadeae and Cer- 
cocarpeae at the proximal end and erect or ascending. Further- 
more, the pistil and the stamens in Coleogyne are separated by a 
tube equalling the stamens. The filaments are adnate to the 
base on the outside of this tube. Whether this tube represents a 
prolonged hypanthium or a set of abortive and united filaments, 
is hard to tell. The fact is that no such structure is found any- 
where else in Rosaceae, but something similar is found in Cap- 
paridaceae. The fruit itself, however, is an achene, and hence 
very unlike the capparidaceous fruits. Another character ab- 
normal to the Rosaceae is the opposite leaves and branches. The 
only other rosaceous genus, that I can remember, having opposite 
leaves is Rhodotypus.* The latter is so closely related to Kerria 
and in other respects typical, that no doubt can be entertained 
regarding its belonging to the family. It is not so with Coleogyne. 
Its peculiar flowers, its peculiar habit, more resembling Rhamna- 
ceae, and opposite leaves and branches, etc., give rise to the 
question, may it not properly represent a new family? 
WALDSTEINIA 
Waldsteinia Doniana Tratt. Fifteen years ago Dr. Small dis- 
tinguished from W. fragarioides a new species which he published 
* Since the above was written Captain John Donnell Smith has described (Bot. 
Gaz. 57: 420. 1914) another abnormal genus with opposite leaves, viz. Guamatela. 
