158 KEY AND FLORA 



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 vring 

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



1. T. americana L. Basswood, AVhitewood. A large tree, some- 

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

 unsymmetrical, heart-shaped or truncate at the base, sharply toothed. 

 Floral bract often narrowed at the base. Fruit somewhat ovoid, i 

 in. or more in diameter. Common in rich woods; occurs farther N. 

 than No. 2. 



2. T. Michauxii Nutt. Basswood. A tree of medium size. Leaves 

 ovate, acuminate at the apex, obtuse and oblique at the base, mucro- 

 nate-serrate, woolly on both sides or smooth above when old. Flowers 

 fragrant ; floral bract 2-^ 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.* 



3. T. heterophylla Vent. White Basswood. A large tree. Leaves 

 larger than in T. americana or T. HHchaujii, often 6-8 in. long, smooth 

 and bright green above, silvery-downy underneath. In wooded or 

 mountainous districts. 



4. T. europaea 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. 



65. MALVACE.a;. Mallow Family 



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

 leaves, with stipules. Mowers actinomorphic. Sepals 6, often 

 surrounded by an involucre at the base. Petals 6. Stamens 

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

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



carpels. 



I. ABUTILON Adans. 



Calyx 5-cleft, the tube often angled. Styles 5-20, with 

 knobbed stigmas. Carpels as many as the styles, arranged in 

 a circle, each 1-celled, 3-6-seeded, and opening when ripe l)y 

 2 valves. 



1. A. striatum Dicks. Tassel Tree, Flowering Maple. A 

 shrub 5-1 ft. high. Leaves maple-like. Flowers showy, solitary, 



