176 EIGHTEENTH ANNUAL REPORT ON THE STATE CABINET. 



STRUTHIOPTERIS, Willdenow. Ostrich-fern. 



GERMANICA, Willd. German Struthiopteris. 



Flats of water -courses. Common throughout the vallies of the Mohawk and 

 all its creeks and tributaries. Alluvial bottoms of Fish creek; where the 

 sterile fronds form thickets five to seven feet high. August, September. 



ALLOSORUS, Bernhardi. Rock-brakes. 



GRACILIS, Presl. Slender Allosorus. 



Clefts of rocks in shade and moisture. Helderberg mountains, L. Collins. 

 Littlefalls, B. D. Gilbert. Wooded ledges between Littlefalls and Mud lake, 

 Herkimer county. Trenton-falls. On Sugar creek near Boonville, Gray ; aud 

 along Black river below Watertown. Clitfs of the Chittenango ravine, where 

 it flourishes remarkably, hanging often a foot in length from its hold in the 

 rocks. Rare. July. 



ATROPURPUREUS, Gray. Dark-purple-steinmed Allosorus. 



Limestone rocks. Helderberg mountains, Pearson. Rocky sidehills at Spra- 

 ker's, Montgomery county. Dry hills along Crooked lake outlet, Sartwell. 

 Ithaca, Tompkins county, falls of East creek, Bradley. 



Rare. July - October. 



PTERIS, L. Common Brake. 



AQUILINA, L. Eagle-like-centered Pteris. 



Old sandy fields, bush-lands. Common. June - August. 



ADIANTUM, L. Maidenhair. 



PEDATUM, L. Pedately-hranching Adiantum. 



Woods, ravines. Common. July, August. 



WOODWARDIA, Sinith. 



ViRGiNiCA, Willdenow. Virginian Woodwardia. 



Borders of swamps. Round Wetmore's pond on Frankfort hill. Swamps of 

 Rome throughout. Junius, Seneca county, Sartwell in herb. Ham. Coll. 



Scarce. June - August. 



CAMPTOSORUS, Link. Walking-fern. 



RHIZOPHYLLUS, Link. Booting-fronded Comptonia. 



Rocks in shade, swamps. Helderberg mountains, Pearson. Lofty cliffs of 

 Bignose on the Mohawk, Montgomery county. Abundant at Littlefalls, both 

 sides of the river: ledges on the hills southward, on the road to Warren: 

 Herkimer county. Ravine of Chittenango creek. 



In a cedar swamp west of Onondaga lake it abounds on old logs, stumps, 

 knolls; stretching frequently eighteen or twenty inches the first time, and 

 running on to the third and fourth generation : fronds occasionally forking. 

 On rocks west of Otsego lake an unusual form has been gathered by B. D. 

 Gilbert, having lobes springing from each side of the base of the main one, 

 at right angles, four or five inches in length. Rare. July - November. 



SCOLOPENDRIUM, L. Harf s-tongue. 



OFFiciNARUM, Swartz. Officinal Scolopendrium. 



Ravine of Chittenango creek, Madison county, among loose rocks fallen from 

 the cliffs, in moisture and shade. 



This remains the only known locality in the United States of this fern so 

 frequent in England and Europe. Not many plants now are to be found; and 

 they may be disappearing. Nature, however, well guards them from all dan- 

 ger and even access, save from the reckless and destructive botanist. 



Another station has recently been discovered on the outlet of Lake Simcoe, 

 Canada West. There, too, as m our habitat, it occurs in a ravine below the 

 falls of the stream, in the humid atmosphere. Local. July - October. 



