240 SUMMER FLOWERS. 



base, the petals broad, spreading. — Naturalized on sandy 

 wastes in Lancashire. Fl. July to September. 



(102) Circaea. Enchanter's Nightshade. 



C. Lutetiana : stems erect or shortly decumbent, rooting at 

 the base, 1-1 4 feet high, clothed with short whitish hairs; 

 leaves thin, stalked, broadly ovate, rather coarsely toothed ; 

 flowers white or pink, in slightly-branched, leafless, terminal 

 racemes ; capsule pear-shaped, forming a small burr. — Woods 

 and shady situations. Fl. June, July. 



C. alpina : resembling the last, smaller in all its parts, gla- 

 brous, seldom above six inches high ; leaves heart-shaped, 

 glossy. — Woods, and stony places in mountain districts. Fl. 

 July, August. 



(103) Myriophylliim. Water Milfoil. 



M. spicatum : aquatic ; stems immersed, ascending to the 

 surface, more or less branched; leaves whorled along the 

 whole length of the stem, the numerous capillary segments 

 entire; flower-spike terminal, slender, 2-3 inches long, pro- 

 truding from the water, bearing minute flowers arranged in 

 little whorls, the upper flowers usually males, and the lower 

 ones females; bracts small, entire. — Ditches and ponds. Fl. 

 July, August. 



M. verticillatuin : aquatic ; like the last, but the flowers in 

 the axils of the upper leaves, immersed, and rarely forming a 

 spike protruding above the water; bracts or floral leaves 

 longer than the flowers, and pinnate like the stem-leaves. — 

 Ditches and ponds. Fl. July. 



(104) Hippuris. Marestail. 

 H. vulgaris : aquatic ; stems erect, simple, the upper part 



