DICOTYLEDONOUS PLANTS l47 



corymbs or panicles. Sepals 5. Petals 6 or fewer or wanting. 

 Stamens many, inserted on a swollen disk. Ovary 2-10-eelled, 

 with 1 or more ovules in each cell. Fruit 1-12-celled, dry or 

 berry-like. 



TILIA, Toum. 



Trees with rough gray bark on the trunk ; bark of the twigs 

 smooth, lead-colored ; wood white and soft. Leaves cordate, 

 usually inequilateral. Cymes axillary or terminal, peduncles 

 adnate to a large, prominently veined leaf-like bract. Flowers 

 yellowish-white. Sepals 5. Petals 6. Stamens many, in 6 

 groups. Ovary 5-celled, with 2 ovules in each cell ; stigma 

 5-lobed. Capsule 1-celled, 1-2-seeded ; peduncle and bract 

 deciduous with the matured fruit, the bract forming a wing 

 by which the fruit is often carried to a considerable distance.* 



1. T. pubescens. Ait. Basswood. A tree of medium size ; leaves 

 ovate, acum.inate at the apex, obtuse and oblique at the base, 

 mucronate-serrate, woolly on both sides or smooth above when old ; 

 flowers fragrant, floral bract 2-3 in. long, usually rounded at the 

 base. Fruit globose, about ^ in. in diameter. In rich woods. Bees 

 gather large quantities of nectar from the flowers.* 



2. T. americana, L. Basswood, Whitewood. A large tree, 

 sometimes 125 ft. high. Leaves larger than in No. 1 (2-5 in. wide), 

 often unsymmetrical, heai-t-shaped or truncate at the base, sharply 

 toothed. Floral bract often narrowed at the base. Fruit somewhat 

 ovoid, ^ in. or more in diameter. Common in rich woods ; occurs 

 farther N. than No. 1. 



3. T. europsea, L. European Linden. A good-sized tree. 

 Leaves roundish, obliquely heart-shaped, abruptly taper-pointed, 

 finely toothed. Flowers differing from Nos. 1 and 2 in the absence 

 of petal-like scales at the bases of the stamens. Cultivated from 

 Europe. 



64. MALVACE.^. Mallow Family. 



Herbs or shrubs, with simple, alternate, palmately-veined 

 leaves, with stipules. Flowers regular. Sepals 5, often 

 surrounded by an involucre at the base. Petals 5. Stamens 

 numerous, monadelphous. Pistils several, more or less dis- 

 tinct. Fruit a several-celled capsule or a collection of 1-seeded 

 carpels. 



