86 



Philadelphus grandijloms (Large-Flowered Mock-Orange), 

 from Virginia, and 



Philadelphus coronarius (Common Mock-orange), from 

 Japan, are frequent in old gardens. Tliey are improperly called 

 " Syringa," the botanical name for the Lilac. 



HAMAMELACEJE. 



(WITCH-HAZEL Family.) 



Hamamelis Virginica, L. (Witch-hazel.) Very common in 

 most parts of the county, often growing 25 feet high, with a trunk 

 4-6 inches in diameter. 



LYTHRACE^. 



(LOOSESTRIFE Family.) 



Nessea verticillata, H. B. K. (Swamp Loosestrife.) Common 

 along the borders of streams and ponds. It sometimes has a stem 

 the size of the fore finger, and is interesting botanically on account 

 of the spongy bark which is found on all the stems which dip into the 

 water, a feature possessed in common with other plants inhabiting 

 similar situations. 



CACTfACEiE]. 

 (CACTUS Family.) 



Opuntia vulgaris, Mill. (Prickly Pear.) This plant grows 

 naturally from Nantucket southward. Mr. Hugh Wilson found plants 

 of it at Kernwood, Salem (probably escaped), some years ago, and on 

 the land of Mr. Graves in North Keadiug, on a sandy bank of the 

 Ipswich River, just beyond the Middleton line, is a fine patch of this 

 plant which has increased rapidly from plants placed there many 

 years since. 



CORNACE^. 



(DOGWOOD Family.) 



Cornus florida, L. (Flowering Dogwood.) This is in the 

 flowering season a very beautiful and conspicuous tree. It grows 

 from 10-20 feet high, with a trunk some 3-5 inches in diameter. It is 

 found abundant in parts of Wenham Swamp, where it was noticed by 

 Dr. Chas. Pickering in 1824, and also in Essex, Boxford, etc. These 

 are about the most northerly localities for this species. 



Cornus circinata, UHer. (Round-leaved Cornel.) "Lynn, 

 Saugus, Swampscott," Tracy. "Audover," Mrs. Downs, Bev. H. P. 

 Nichols. Boxford, Beverly, etc. A low tree, or tall shrub. 



