264 



INDUSTRIAL PLANTS 





Fig. 251. — Elni-l(>uvf(i Linden (Tilui ulmifolia. Linden Family, Tiliacea). 

 Flowering branch. Flower, enlarged. Same, cut vertically. (Bail- 

 Ion.) — Tree 30 m. or more tall; bark grayish; leaves whitish beneath; 

 flowers cream-color; fruit brownish. Native home, Europe. 



Fig. 252. — Linden. Floral diagram. Fruit. Seed, entire. Same, cut 

 vertically. (Baillon.) 



Fig. 25.3. — Poplar, American Aspen (Populus tremuloides. Willow Family, 

 Salicace(T). Leafy branch, 5. Leaf. Staminate flower-cluster. Pistil- 

 late flower-cluster. Pistillate flower. Seed. (Britten and Brown.) — Tree 

 about 30 m. tall; leaves with stalk flattened at right angles to the blade, 

 flowers greenish; fruit dr,\-. Native home. Northern North America. 



