WOODS AND THICKETS IN SUMMER 



131 



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

 two seeds in each cell. 



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

 [Tilia parvifolia), has a thin, angular fruit ; and another, known 

 as Tilia grandifolia, has very large, broad leaves, downy on both 



THE LARGE-FLO^TERED ST. JOHN'S WORT. 



sides, and a downy fruit with from three to five prominent 

 ribs. 



Several species of St. John's-wort (order Hypericacece) 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, entu-e, without stipules, and 

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

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

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



K 2 



