HOFFMANN: FLORA OF BERKSHIRE COUNTY. 195 
var. elatius (Link) Butters.— {Vid. Rhodora, 19: 191, 1917.) 
Dry woods, thickets and clearings; frequent in the southern part of 
the valley. 
var. rubellum (Gilbert) Butters. — ( Vid. Rhodora, 19: 193, 1917.) 
Rich woods and swamps; common. 
CAMPTOSORUS. Walking Leaf. 
C. rhizophyllus (L.) Link. Walking Leaf; Walking Fern. — 
On limestone, chiefly in shade; frequent in the valley. Becket (C. S. 
Lewis) . 
forma auriculatus, f. nov. — Auriculis elongatis. Auricles 
elongated, sometimes rooting. 
Limestone ledge, New Marlboro. 
CRYPTOGRAMMA. Rock Brake. 
C. Stelleri (Gmel.) Prantl. Slender Rock Brake. — On shaded 
limestone clifl^s, Bullock's Ledge, Williarastown. 
CYSTOPTERIS. Bladder Fern. 
{Filix 111. Fl. ed. 2.) 
C. bulbifera (L.) Bernh. Bulb-bearing Fern. — Wet banks and 
moist rocks, chiefly in shade, generally but not always in calcareous 
soil ; frequent in the valley and on the slopes of Greylock and of The 
Dome, but rarer on the plateau. Washington and Becket (C. S. 
Lewis). 
C. fragilis (L.) Bernh. Fragile Bladder Fern. — Shaded cliffs, 
moist banks and rocky wooded hillsides ; frequent. 
DENNSTAEDTIA. 
{Dicksonia Man. cd. 7; riil. Rhodora, 21: 175, 1919.) 
D. punctilobula (Michx.) Moore. Hay-scented Fern. — Dry 
woods and ui)lan(l hillsides; common. When growing in shade near 
an opening, this fern turns the face of the frond, that is the side that 
does not bear the spores, to the light. 
ONOCLEA. 
0. sensibilis L. Sensitive Fern. — Wet meadows, swampy 
thickets and wet woodland; common. 
