284 SUMMER FLOWERS. 



capsule two-celled, with several seeds. Roadsides and waste 

 places. Fl. June to August. 



P. media : leaves ovate, nearly sessile, hoary, marked with 

 5-7 ribs ; spike dense, cylindrical ; capsule two-seeded. Dry 

 limestone pastures. Fl. June to August. 



P. lanceolata : leaves lanceolate, slightly hairy, with 3-5 

 ribs; spike ovoid or oblong; capsule with two seeds. Rib- 

 wort. Meadows, pastures, and waste places. Fl. June, July. 



** Leaves without prominent ribs. 



P. maritima : leaves narrow-linear, fleshy, entire, or slightly 

 toothed ; spike cylindrical ; ovary two-celled. Muddy salt- 

 marshes. Fl. August, September. 



P. Coronopus : leaves linear or linear-lanceolate, or pinna- 

 tifid with linear segments, hairy; spikes cylindrical; ovary 

 four-celled. Star of the Earth. Dry, stony or sandy places. 

 Fl. June to August. 



(194) Littorella. SHOREWEED. 



L. lacustris : leaves tufted, narrow-linear, entire ; flowers 

 small, mono3cious, the males singly or two together, on short 

 peduncles, the females sessile among the leaves. Margins of 

 lakes and pools. Fl. June. 



(195) Pinguicula. BUTTERWORT. 



P. vulgaris : leaves spreading, ovate or oblong, somewhat 

 succulent, covered with crystalline points which give them a 

 wet, clammy appearance ; flower-stalks 3-5 inches high, bear- 

 ing one handsome, bluish-purple flower, the broad campanu- 

 late throat of the corolla attached laterally to the receptacle, 

 and projected below into a slender spur about its own length. 

 Bogs. Fl. May, June. 



