56 PROCEEDINGS MANCHESTER INSTITUTE 



2O. Quercus rubra L., var. ambigua 

 (Michx. f.) Fernald. 



It is a relief to find this form authoritatively named as a 

 variety of rubra rather than coccinca. The trees observed in 

 this vicinity have altogether the aspect and habit of rubra, dif- 

 fering from the type only in their fruit, which somewhat re- 

 sembles that of coccinca. The fruit varies on different plants, 

 being large on some and small on others, having the cups 

 sometimes thick and sometimes thin, but always deep, and the 

 scales sometimes appressed and sometimes slightly squarrose. 

 The freeness of the trunk from lichens is also a character of 

 some importance, the bark in coccinea being usually more or 

 less infested with them, while that of rubra is noticeably free 

 from them. 



21. Quercus coccinea Muench. 



As was reported in a note to Quercus in Vol. I of these 

 Proceedings, (1900), this is at Manchester the most abundant 

 of the eight species named. The eastern part of the city may 

 fairly be said to have been originally laid out in groves of scarlet 

 oak. Many of the trees which were spared when the land was 

 cleared remain as shade trees. In autumn the characteristic 

 tint of the foliage sheds a blaze of glory over Derryfield Park 

 and Oak Hill and the dry hills farther to the east. The largest 

 trees thus far noted are from 60 to 70 ft. high. In general the 

 species appears to be more subject to decay and consequently 

 shorter lived than rubra or velutina. Sound and vigorous trees 

 are, perhaps, the handsomest of the genus. 



22. Ulmus fulva Michx. 



The two trees reported in Vol. I (1900) as growing at 

 "Arcadia" by Piscataquog river have unfortunately been de- 

 stroyed during the formation of the artificial lake which has re- 

 placed the meadows for a mile or more above Kelley's Falls. 

 It is greatly to be desired that thorough search be made for the 



