72 



THE AMERICAN BOTANIST. 



on-Tweed, noticed it for the first time in a pond, at Dnnse 

 Castle, in the month of July of that year. Specimens were 

 sent to the Cambridge Botanic Gardens, where it grew far 

 too abundantly, and the refuse, which was from thence 

 thrown into the Cam, has thriven with such extraordin- 

 ary luxuriance that it threatens to form a serious impedi- 

 ment to the navigation of that stream. From Kew Gar- 

 dens .a has, in like manner, escaped into the Thames, 

 where it is already one of the most abundant and trouble- 

 some of the water- weeds ; while in some of our canals it 

 positively threatens to put a stop to the navigation en- 

 tirely." 



Morristown, Pa. 



[This plant is our common ditch moss and also goes 

 by the names of Udora Canadensis and Anacharis Cana- 

 densis. It does not appear to be troublesome in Ameri- 

 ca.— Ed.] 



AMONG TEXAS FERNS. 



BY J. M. FETHEROLF. 

 ^pHE writer has roamed the woods of eastern Texas day 

 J- after day during the past winter and accordingly 

 had an opportunity of meeting a number of old fern- 

 friends and at the same time becoming acquainted with a 

 number of new ones most of which have never been report- 

 ed from this region before. It is my purpose in this arti- 

 cle not only to report those found but at the same time to 

 state such facts about their occurrance and collection as 

 maybe of interest to the student of these most interesting 

 plants. 



Silsbee, Hardin County, was our first station. After 

 establishing camp (Oct. 15, 1902) a short excursion was 

 made to prospect on what the country might have in 

 store. Naturally we betook ourselves to the narrow strip 

 of hardwood land along the small stream near by where 

 plant life seemed more varied than on the monotonous 

 piney plains. Of course old friends greet us first. We 

 were glad to welcome the flowering fern {Osmunda regal- 

 is) and the cinnamon fern (O. cinnamomea) y but — behold I 



