Ferns or Dutcuess County, New YORK 7 
27. BoTrRYCHIUM OBLIQUUM Muhl. Observed in sev- 
eral localities, usually in open pastures but once in a 
swamp. Probably the plants were abundant, for when 
one was noticed careful search always revealed others 
in the immediate vicinity. 
28. BorRYCHIUM DISsECTUM Spreng. Reduced plants 
referable to this species were collected in an open hill- 
side pasture. In the specimens collected the differences 
between this and the last preceding seem very slight 
and hardly specific. 
29. BorryYcHIUM vIRGINIANUM (L.) Sw. Scattered 
plants were frequent in the moist woods. 
30. EquisrrumM ARVENSE L. Rather common in 
damp shaded soil of the valley. 
31. EquISETUM HYEMALE RoBUsTUM (A. Br.) A. A. 
Eaton. Observed in several localities about pools of 
water. 
32. Lycopopium LucipuLUM Michx. Rather abun- 
dant in deep ravines, at the foot of cliffs. 
33. Lycopoprum opscuruM L. Apparently rare, for 
it was seen in a single locality. 
34, LycopopIUM COMPLANATUM FLABELLIFORME Fern- 
ald. Very abundant, especially in birch thickets, where 
it was the most conspicuous herbaceous plant. 
35. SELAGINELLA RUPESTRIS (L.) Spring. This was 
very abundant in one locality on some wide expanses of 
worn rocks in a pasture near the summit of a mountain. 
Growing with it were Polygonum tenue and Sarothra 
gentianoides. 
36. SELAGINELLA Apopa (L.) Fernald. Among moss 
in open marshes, among Drosera, Parnassia, and other 
bog plants. 
Wasuinoeton, D. C. 
