282 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Hypericum canadense L. 



Common. Sandy ground, usually in moist or wet but some- 

 times in dry places. July — Sept. 



Hypericum gentianoides (L.) BSP. (gentian-like). 

 Hypericum nudicaide Walt. 

 Sarothra gentianoides L. 

 Orange Grass. Pineweed. 



Common. Dry sandy or rocky ground, often plentiful on 

 sand plains. Aug. — Sept. 



Hypericum virginicum L. 



Triadenum virginicum Raf. 

 Elodea campanulata Pursh. 

 Marsh St. John's-wort. 



Frequent. Swamps and in shallow water. July — Sept. 



ELATINACEAE. WATERWORT FAMILY. 

 ELATINE L. Waterwort. 



Elatine americana (Pursh) Arn. 

 Mud Purslane. 



Muddy shores and in shallow water. Rare or local in most 

 districts: Norwich (Mrs. E. E. Rogers), Groton, Lyme and 

 Old Lyme (Graves), Guilford (G. H. Bartlett), Southington 

 (Andrews & Bissell), Middlebury (Harger), Kent (Fames 

 & E. H. Austin). Local or occasional in southwestern Con- 

 necticut. July — Aug. 



CISTACEAE. ROCKROSE FAMILY. 

 HELIANTHEMUM Mill. Rockrose. 



Helianthemum canadense (L. ?) Michx. 

 Frostweed. 



Frequent. Dry sandy or gravelly places. Mid-May — July. 

 The plant is medicinal. 



Helianthemum majus BSP. (larger). 

 Frostweed. 



Frequent. Dry open ground in sandy or gravelly soil. 

 June — July. 



