— 8i— 
would, it was then quite impossible I should point out the complementary 
note of my learned colleague, since that note was published only two 
months or so after I had written my article, and I had addressed it to the 
Editor of the Bryologist. 
At last, Mrs. Britton observes I have wrongfully written Pilotrichella 
cymbifolia (Sulliv.) Ren. & Card., instead of Pilotrichella cymbifolia (Sulliv.) 
Jaegr. Most willingly I confess she is right. I should have looked into 
Jaeger’s work, instead of merely and simply trusting to the article that has 
inspired mine and where you may read: Pilotrichella cymbifolia (Sulliv.) 
Ren. & Card. Muse. Amer. Sept. 44. 1895 .(Bryologist 6:60). Now that article 
bears the signature of Mrs. Britton herself! Does not my amiable colleague 
fear to have rendered herself, in her turn, rather “liable to ridicule ” whilst 
blaming me for a mistake she herself was the first to commit? 
Last of all, I shall remark that Mrs. Britton gives wrongfully among the 
synonyms of Homalothecium subcapillatum Sulliv., Pterogonium ascen- 
dens Schw., and Platygyrium brachycladon Kindb. It is not know exactly 
what Bridel’s Pterigynandrum brachycladon is. That author quotes as 
synonym of its species ; Pterogonium decumbens Schw. Suppl. II. I. 32, 
Tab. CX, which from the description, the plate and the specimen preserved 
in Hedwig-Schwaegrichen’s Herbarium, is obviously the Homalothecium 
subcapillatum (Hedw.) Sulliv. It is therefore possible Bridel’s plant should 
likewise be related to that species. But certainly such is not the case with 
Pterogonmm ascendens Schw. Supp. III. I. 2, Tab. CCXLIII, nor with the 
Platygyrium brachycladon Kindb. Eur. & N. A. Br. 31. Those two names 
concern one and the same species, with leaves provided with double and 
very short nerve, which has evidently nothing common with Homalothecium 
subcapillatum and which is, on the contrary, nearly related to Platygyrium 
repens , as I show T ed in my Revision of the Types of Hedwig and Schwaeg- 
richen, with figures to support it. My opinion, based on the examination 
of the types of Pterogonium ascendens preserved in the collection of those 
two authors in Boissier Herbarium, has, besides, been admitted, without 
being discussed ever so little, by Mrs. Britton herself (Bryologist, 5 .II ) 
I do not know upon what reasons she now grounds her change of opinion ; 
it seems to me it would be useful if she should state those reasons in the 
Bryologist. Charleville, May 15, 1904. 
HAMMOCK FORMATION. 
The following’ is taken from the Journal of the New York Botanical Garden, Vol. V : 
August, 1904, p. 162. 
The hammocks consist of isolated groups of hardwood trees, shrubs, 
vines and herbaceous plants in the pinelands. The dense, often almost 
impenetrable growth excludes the direct sunlight and maintains a high 
degree of moisture, both conditions being favorable to the development of 
fungi, hepatics, mosses and ferns, representatives of which occur in great 
abundance. John K. Small. 
