29 
A New Species of Cyperus- 
By N. L. Britton. 
CyPERUsRusHYi. — Calm slender, triangular, smooth, about a foot ^ 
in height; leaves narrowly linear, smooth, shorter than the cvilm; in- 
volucre about five-leaved, equalling the rays ; umbel three- to five- 
rayed, one or two of the rays elongated to a length of about three 
inches ; heads composed of four to seven, lanceolate, acute spikelets, 
which are thirteen- to twenty-flowered, their axes not winged; scales 
abouf eleven-nerved, the mid-nerve slightly darker, keeled, distich- 
ously arranged, broadly ovate and obtuse when unfolded, all fertile ; 
achenium black, smooth, sharply triangular obovate ; stamens tliree; 
roots fibrous, wn'th short, scaly rhizomes. 
Collected near Silver City, New Mexico, in i8So, by Mr. H. H. 
Rusby, for whom it is named. 
Notes on New England Algae, III— The different character of the 
marine flora of the New England Coast in its northern and southern 
parts has been noticed by all algologists. North of Cape Cod it is 
distinctly arctic, while south of Cape Cod it has, as pointed out by 
Professor Farlow, considerable resemblance io that of the Adriatic. 
The only important exception hitherto recorded is Goose Cove, 
Squam, on Cape Ann, a small pond, separated by a dam from the sea, 
and where the water becomes quite warm in summer. Three species 
found here by Professor Farlow, Rhabdonia tenera, Ag., Gracilaria 
nmltipariita. Ag., and Chofidriopsis tcnuissima, Ag., though common to 
Vineyard Sound, etc., were new to the northern coast. Since then 
the Gracilaria has been found in ditches in the Mystic River marshes, 
but the other species have not been recorded from any new locality. 
Among the algae collected by the late Silas Durkee, M.D., and 
T^ow in the herbarium of the Boston Society of Natural History, is a 
small specimen of Dasya elegans marked ''"'Dasyapedicellata, Ag., Bos- 
ton/' Last summer I made a number of excursions to various 
points within fifteen miles of Boston to see if this or any other of the 
southern species were to be found there. I was much more success- 
^^1 than I anticipated, and in Weymouth River and the adjoining 
cove running up into Quincy, I found a rich flora of characteristic 
southern forms. In July and August I found Dasya elegans, Ag., 
Grinnellia Americana, Harv., Griffiihsia Bornetiana, Farlow, Lomen- 
^^naimcinatay Meneg., Champia parvula,, Ubxv., Mesogloia divaricata, 
Kutz., Polysiphonia atrorubescens, Grev., and P, variegata, Ag., all 
floating in great abundance. The fronds of Dasya were frequently 
over two feet long, and the Grinnellia grew in tufts, sometimes of 
twenty fronds or more, each over a foot or more in length. The 
Gpffithsia was more luxuriant than I had ever seen it, even in such a 
place as Buzzard's Bay, where it reaches very good dimensions; the 
^omentaria appeared in all the forms described in the Nereis Boreali- 
Amerirnnn • t\-^^ z>7,^7. 7....- ^f r.r^r^A cX-Tf^ nnrl nffpn hnd on it 
