132 



EHIZ0CAEPEJ3. 



(Water-feen Family.) 



Marsilia quadrifolia, L. (Maesilia.) 

 First discovered at Bantam lake, Conn., some years ago. It has 

 become established in some ponds near Boston, and for awhile in 

 one 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. 



OPHIOGLOSSACE^. 

 (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. K. and J. H. S.) ; Beverly, 



1872 (J. H. EmertOB, etc.); Danvers, 1879 (J. H. Sears). Rather 



scarce. 

 Botryehium laneeolatum, Angs. 



Georgetown, Aug., 1875 (Mrs. C. N. S. Horner) ; West Newbury, 



1879 ("W. P. Conant) ; Magnolia, 1880 (C. J. Sprague) ; Middleton, 



1S80 (J. K.). 

 Botryehium matricarisefolium, A. Br. 



West Newbury, 1879 (W. P. Conant) ; Middleton (J. H. S. and 



J. R.), the small form often coufoanded with B. simplex; Boxford, 



1880, the larger form. 

 Botryehium Virginianum, Sm. (RATfLESNAKB Fern.) 



Beaver pond woods, Beverly, 1870 (J. R.) ; West Newbury (W. P. 



Conant), Danvers, Haverhill, Georgetown, Boxford, etc. Not very 



common. 

 Botryehium ternatum, Sw. 



Moist pastures and even in dry soil. A most variable species, 

 (a). Var. rutaefolium, Eaton. 



This i.s usually called var. lunarioides, which is a southern form 



and not found here. 

 (%). 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. Hornei'. 

 (c) . Var. obliquum, MiUe. 



The most common form with quite sharply pointed segments. 

 {d). Var. dissectum, Milde. 



Nearly as common as the last. The frond is cut and divided in a 



very beautiful manner. 



