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RHIZOCARPEA. 
(WATER-FERN FamMILy.) 
Marsilia quadrifolia, Z. (Marsirt1a.) 
First discovered at Bantam lake, Conn., some years ago. It has © 
become established in some ponds near Boston, and for awhile in 
ene of the ponds near Legge’s hill, Salem. It is feared, however, 
that on account of a severe drought a year or two since, it has been 
destroyed. 
OPHIOGLOSSACES. 
(ADDER’S-TONGUE FaMILy.) 
Ophioglossum vulgatum, L. 
Moist, not boggy places, in grass, near the edges of swamps, Box- 
ford (two stations near Crooked pond, J. R. and J. H.S.); Beverly, 
1872 (J. H. Emerton, etc.); Danvers, 1879 (J. H. Sears). Rather 
scarce. 
Botrychium lanceolatum, Angs. 
Georgetown, Aug., 1875 (Mrs. C. N. S. Horner); West Newbury, 
1879 (W. P. Conant); Magnolia, 1880 (C. J. Sprague); Middleton, 
1880 (J. R.). 
Botrychium matricariefolium, A. Br. 
West Newbury, 1879 (W. P. Conant); Middleton (J. H. S. and 
J. R.), the small form often confounded with B. simplex; Boxford, 
1880, the larger form. 
Botrychium Virginianum, Sw. (RATrLESNAKE FERN.) 
Beaver pond woods, Beverly, 1870 (J. R.); West Newbury (W. P. 
Conant), Danvers, Haverhill, Georgetown, Boxford, etc. Not very 
common. 
Botrychium ternatum, Sw. 
Moist pastures and even in dry soil. A most variable species. 
(a). Var. ruteefolium, Eaton. 
This is usually called var. lunarioides, which is a southern form 
and not found here. 
(b). Var. australe, Eaton. 
This is the most highly developed form; and specimens, very nearly 
resembling the fine plants often sent from California, have been 
collected near Danvers by J. H. Sears, and others hardly less fine, 
at Georgetown by Mrs. C. N. S. Horner. 
(c). Var. obliquum, Milde. 
The most common form with quite sharply pointed segments. 
¢d). Var. dissectum, Jfilde. 
Nearly as common as the last. The frond is cut and divided in a 
very beautiful manner. 
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