This species differs from locus fris in its shorter, more numerous, 

 tapering leaves, spotted sporangium, papillose microspores, and 

 larger macrospores. 



It is remarkable for the shape and size of the spores. Nearly 

 all the sporanges of my plants are unripe, but good spores are found 

 among the roots. In these the sculpture opens into a network. 

 Normal spores are found, but most of them bear evidence of having 

 grown singly or in pairs in the mother cells, as does Selaginella ru- 

 pestris. These are spherical or hemispherical, without commisures 

 and with no equatorial belt, or with it misplaced, often inclosing a 

 very small space at one end. The microspores also vary, some- 

 times reaching 44 p. 



Deer brook beach, Jordan Pond, Mt. Desert Island, Maine, 

 Rand. Quoted in Redfield and Rand's Flora as Braunii. South 

 shore of Jordan Pond, September 10, 1894, Rand. 



Type in the A. A. Eaton herbarium. 



3. I. TUCKERMANI A. Br. 



Formerly considered rare, this species appears to be quite com- 

 mon in New England, and any large pond with sandy shores may 

 be expected to yield it, especially if a little silt has been deposited 

 on the sand. It is usually found in "submersed pastures," the belt 

 where littoral vegetation extends beneath the surface of the water 

 for a short distance after the lowest stage of water has been reached. 

 I quite accidentally discovered in 1895 that this species was tri-lobed 

 in many instances, and some localities yield 25 per cent, of tri-lobed 

 plants. Baker (Fern Allies, p. 126) appears to be the first to men- 

 tion stomata in this species, though the fact was discovered by Mr. 

 Dodge and myself quite independently. Plants taken from inun- 

 dated situations usually have none, but when growing on the bor- 

 ders of ponds, a few leaves may usually be found which show them. 



Distinguishable at sight by its very slender, spiral or recurved, 

 reddish leaves. Spores of northern specimens are much larger than 

 those from central Massachusetts, so far as seen. 



At Pautuckaway Pond, Nottingham, N. H., and Kimball's 

 Pond, Amesbury, Mass., I find a few plants which in the field have 

 been taken for this species, but the leaves are larger, the sporangia 

 dark spotted, as much so as most specimens of Howellii. It ap- 

 pears to be a new species, but material is inadequate for descrip- 

 tion. 



Mt. Desert, Rand, Fernald: Oldtown, Maine, Harvey. Com- 



