WOODS AND THICKETS IN SUMMER 



131 



is a woody nut, globular or more or less angled, five-ceUed, with 

 two seeds in each cell. 



A smaU-leaved variety, sometimes regarded as a distinct species 

 {Tilia par vi folia), has a thin, angular fruit; and another, known 

 as Tilia grand if olia, has very large, broad leaves, downy on both 



THE LAHGE-FLOWERED ST. JOHX'S WORT. 



sides, and a downy fruit ^ith from three to five prominent 

 ribs. 



Several species of St. John's-wort (order Hypericacea^) grow 

 in thickets and other wooded spots. They vary considerably in 

 size, as well as in general appearance, but all agree in the following 

 features : Their leaves are opposite, entire, without stipules, and 

 either sessile or very shortly stalked. The flowers are regular, 

 with five sepals ; five petals, often obhque at the tip ; numerous 

 stamens, united or clustered into three or five sets ; and a superior 



K 2 



