226 TILIACEAE. 
1. 
2. 
3. 
Tiz1a. Linden. Lime. Basswood. 
(Family Tiliaceae). 
Trees: deciduous. Twigs mode- 
rate, zig-zag, with elongated in- 
ternodes, terete, the cortex with 
fibrous wedges in section: pith 
round or squarish, moderate, con- 
tinuous, pale, sometimes pink or 
yellowish. Buds solitary or preco- 
ciously branched in inflorescence, 
obliquely sessile, rather large, in- 
equilaterally ovoid, with 2 mostly 
green or red glistening-punctate 
scales, the end-bud lacking. Leaf- 
scars alternate, 2-ranked on 
shoots, somewhat elevated, half- 
elliptical: bundle-traces 3 or most- 
ly compound and then sometimes 
scattered: stipule-scars unequal, 
one of each pair much elongated. 
The winter-characters of lindens 
are not very marked. References 
to them are given under Grewia. 
Twigs somewhat loosely hairy. T. platyphyllos. 
Twigs tomentulose. 2. 
Twigs glabrous. 3. 
Weeping. T. petiolaris. 
Not wéeping. T. tomentosa. 
Twigs slender (2-3 mm.). T. cordata. 
Twigs moderate (3 mm.). T. heterophylla. 
Twigs relatively stout (often 4 mm.). © (1). T. americana. 
