MIDDLESEX FLOKA. 



15 



HYPERICACE/E. ST. JOHN'S-WORT FAMILY. 



Htpeeicum, L. 



H. ellipticum, Hook. 

 Medford, Tewksbury, Chelmsford, et al. Not uncommon. June- 

 Aug. 



H. PERFORATUM, L. ST. J0HN'S-"W0ET. 



Common. June-Aug. Nat. from Eu. 

 H. maculatum, Walt. (H. corymbosum, Muhl., Man.) 



Not uncommon. July-Aug. 

 H. mutilum, L. 



Common. July-Sept. 

 H. Canadense, L. 



Very common. June-Sept. 

 H. nudicauie, Walt. (H. Sarothra, Miohx, Man.) 



Very common. June-Sept. 



Elodea, Juss., Pursh. 



E.campanulata, Pursh. (Elodes Virginica, Nutt., Man.) 

 Common. July-Aug. 



ELATINACE/E. WATER-WORT FAMILY. 

 Elatinb, L. 



E. Americana, Arn. , ™ ,, 4. 



Mystic Pond (C. E. Perkins); Fresh Pond (Bigelow's Fl. Bost, 

 under Crypta minima) ; Arlington (Rev. Thos. Morong). 



CARYOPHYLLACE.^. PINK FAMILY. 



DiANTHUS, L. 



D. Akmeria, L. Deptford Pink. ^ , . 



Maiden, Medford, Reading, et al. Rather scarce. July-Aug. Nat. 



D. ^ddtoides, L. Ashland, spontaneous in old gardens (Rev. Thos. 



Morouff) . 



« A low plant with perennial rootstock, producing a tuft of procum- 

 bent leafy shoots; the annual flowering stems erect or ascending, 

 smooth or slightly hairy, 5 or 10 in. high, dichotomously branched 

 above. Leaves a third of an inch long, green, smooth, obtuse, 

 the upper somewhat acute. Flowers rather small, scentless, purple 

 or whitish, spotted, singly or in pairs, on short pedicels. Sepals with 



