TILIACE^E 671 



Peduncles and pedicels puberulous ; staminodia emarginate ; leaves mostly obliquely 

 truneatoe at the base. 3. T. Floridana (C). 



Leaves pubescent or tomentulose below. 



Leaves more or less stellate-pubescent below, with conspicuous axillary tufts of hairs. 



4. T. Michauxii (A, C). 

 Leaves hoary-tomentulose below, without axillary tufts of hairs. 



5. T. heterophylla (A, C). 

 Branchlets stellate-pubescent ; leaves rusty-tomentulose below. 6. T. pubescens (C). 



1. Tilia Americana, L. Linden. Bass Wood. 



Leaves broadly oval, obliquely cordate or sometimes almost truncate at the base, 

 contracted at the apex into slender acuminate entire points, coarsely serrate, with 

 incurved glandular teeth, glabrous with the exception of tufts of rusty brown Lairs 

 in the axils of the principal veins below, thick and firm, dark dull green on the upper, 

 lighter and yellow-green and lustrous on the lower surface, 5'-6' long, 3'-4' broad, 

 turning pale yellow in the autumn before falling; their petioles slender, l'-2' long. 



Flowers opening during the first week of July; pedunculate bract 4'-5' long, I'-l^' 

 broad, rounded or pointed at the apex, decurrent nearly to the base or to within '-!' 

 of the base of the peduncle; peduncle slender, glabrous, the free portion 3 '-4' long; 

 pedicels slightly angled, puberulous, about $' long; sepals ovate, acuminate, densely 

 hairy on the inner and slightly pubescent on the outer surface, about ^' long and one 

 third shorter than the lanceolate petals. Fruit oblong to oblong-obovate, rounded 

 or pointed at the apex, '-' long, and covered with short thick rufous tomentura. 



A tree, usually 60-70, or sometimes 120-130 high, with a tall trunk 3-4 in 

 diameter, small often pendulous branches forming a broad round-topped head, slender 

 smooth glabrous ligjit gray or light brown branchlets marked with numerous oblong 

 dark lenticels, becoming darker in their second and dark gray or brown and con- 

 spicuously rugose in their third year. "Winter-buds dark red, ovate, about ^' long. 

 Bark of the trunk about 1' thick, deeply furrowed, the light brown surface broken 

 into small thin scales. Wood light brown faintly tinged with red, with thick hardly 

 distinguishable sapwood of 55-65 layers of annual growth; employed in the manu- 

 facture of paper pulp, and under the name of white wood largely used in wooden ware, 

 cheap furniture, the panels of carriages, and for the inner soles of shoes. 



