68 



^ Gloeocapsa zostericola, Farlow.— Forming sliapeless, gelati- 

 nous, brownish masses. 'Cells flattened-hemispherical, concave on 

 the inner surface, about 19/^-26/i long by g/^-nM broad, united m 

 twos or fours into colonies of from 4oju-ioo/^ in diameter, with nu- 

 merous distinct, enveloping layers. 



On Zostera, mixed with Calothrix, etc. Wood's Holl, Mass., 



August, 1881. 



In my paper on New England Algae, I stated that Callithaninion 

 versicolor ^z.% known in this country only in its seirosporic condition. 

 Last summer I found specimens at Wood's Holl which showed true 

 favellae and tetraspores also, as are recorded in Europe by Bornet m 

 l^tudes Phycologiques, p. 71. A specimen of CallithamnionPlumula, 

 collected at Gay Head in September, is of interest as showing anthe- 

 ridia, with regard to which little seems to be known in the sub-genus 

 Antithamm'on. The antheridia are in oblong tufts formed by the 

 transformation of the ultimate secund branchlets, and remind one of 

 Harvey's figure of Callithamnion poly sperw urn, Vhyc. Britt., pi. 23T,fig. 6. 



Fern Notes. IV- 



r 



By Geo. E. Davenport. 



Aspidium trifoliatiwt, Swartz.— Dr. Engelma'nn has very kindly 

 favored me with a portion of a specimen of this fine Aspidiimi, which 

 « was collected " in the entrance to a limestone cave, on its perpen- 

 dicular walls, not far from New Braunfels, Texas," in 1878, by the 

 lamented Lindheimer, who was thus the first to collect this species 

 within the limits of the United States. 



Botrychium simplex, Hitchcock. — Mr. W. N. Suksdorf, of White 

 Salmon, W. T., sends a fine, compact, very fleshy, ternate form of this 

 species, the whole plant scarcely more than i-^ inches tall, from Mt. 

 Adams, 



Mr. Suksdorf has collected some eighteen species of the ferns of 

 Washington Territory, including two extreme forms of Botrychtufu 

 ternatum^ the normal form of Aspleniufu Trichomanes^ Cryptogramme 

 acrostichoides, Pellaea densa, Gymnogramme triangularis and Asptdiinn 

 aculeatuin^ var. scopulimim ; and the specimens which he has sent me 

 are exceedingly fine and well selected. His sets are desirable, and 

 well worth the price at which he advertises them. 



Miss Furbish also collected, last season, B. sittiplex in Bridgewater, 

 Aroostook Co., Me., where she reports it as being quite abundant. 



Woodsia Pliwimerae, Lemmon. — Since my notes for the February 

 Bulletin were prepared, I have received specimens of this fern 

 authenticated by its author's ticket, and my foot-note (/. r., p. 22) 

 requires modification in so far as it seemingly places this fern with 

 IV, Mexicana ; it is rather a very glandular form of W. obtusa, but 

 none the less identical with much of the other collections mentioned, 

 and which appear to be considerably mixed. Woodsia Oregana, al- 

 though normally smooth, is sometimes quite glandular (as in some 

 specimens ^yhich I have from Dakota), but in W. ohtusa the normal 

 form itself is often more or less glandular (a character which does 



