eee en oe 
RYDBERG: NOTES ON ROSACEAE 321 
that the two supposed species are identical, and that Lachemilla 
orbiculata ranges from Central Mexico to Bolivia. 
The rest of the North American species except L. ocreata 
resemble A phanes more strongly in habit and leaves, but they are 
all perennials. 
Lachemilla procumbens (Rose) Rydb. is perhaps the most 
common of the Mexican species. Specimens of it are usually 
labeled Alchemilla sibbaldiaefolia HBK. Humboldt, Bonpland 
& Kunth’s figure* shows that the original A. sibbaldiaefolia has 
different hypanthium, inflorescence and leaves, the latter in fact 
less like those of Sibbaldia procumbens than those of L. procumbens 
are. 
Lachemulla domingensis (Urb.) Rydb. was based wholly on the 
description of Alchemilla domingensis Urb., no specimens of any 
Lachemilla having been seen from the West Indies at that time. 
Long after the publication of that part of the North American 
Flora containing Lachemilla, the first specimens were seen, but 
both the place in the key and the description were found to be 
correct and nothing needs to be added. 
The following species were proposed as new: Lachemilla Schie- 
deana Rydb., L. Pringlei Rydb., L. orizabensis Rydb., and L. 
Bourgeaui Rydb. The first two were based in part on Alchemilla 
hirsuta campestris Cham. & Schlecht., which was described from a 
mixture. 
Lachemilla ocreata (Donn. Smith) Rydb. is a very peculiar 
plant, apparently leafless, the leaves being reduced to connate 
imbricate sheaths, cleft into linear divisions. It is closely related 
to the South American Alchemilla nivalis. 
ZYGALCHEMILLA 
This genus was based on Alchemilla pinnata R. &. P., which 
has pinnate instead of palmately lobed leaves, as all the other 
species of the tribe have. This character, as well as the 3-nerved 
sepals and bractlets, constitutes the basis for the generic segre- 
gation. A rather interesting fact in its history may be recorded. 
Remyt described a supposed new species as Alchemilla pinnata, but 
finding that the name was preoccupied by A. pinnata R. &. P., 
* Nov. Gen. & Sp. 6: pl. 561 
T Ann. Sci. Nat. Bot. III. 6: 354. 1846. 
