Statk Board of Forestry. 317 



turning a pale brown; terminal buds blunt, 2-2.5 cm. (5^-1 inch) 

 long, scales ovate; leaflets irregularly serrate; flowers appear in May, 

 yellow or purplish. 



Distribution. Western Pennsylvania, west along the Ohio River 

 to Missouri and south to northern Alabama. Very rare in Indiana 

 and found only in a few counties along the Ohio River. It is the 

 largest tree of the genus in our area. 



The published records of the distribution are as follows: Clark 

 (Baird and Taylor); Dearborn (Colhns); Delaware (Phinney); Jay 

 (M'Caslin); Jefferson (Coulter) and (Young); vicinity of New Al- 

 bany (Clapp). 



Economic value. Too rare to be of any economic importance. 



TILIACE^. The Linden Family. 



TILIA. The Basswoods. 



Trees with medium sized twigs; leaves alternate, mostly taper- 

 pointed, oblique cordate or truncate at the base, serrate; flowers 

 in axillary or terminal cymes, white or yellow, fragrant, peduncles 

 of the cymes with a leaf-like bract adhering to about half their 

 length; fruit nut-like, woody, 1-celled. 



Leaves smooth or nearly so beneath IT. americana. 



Leaves densely white or gray pubescent beneath 2 T. heterophylla. 



1. Tilia americana Linnseus. Linn. Bass wood. Linden. 

 Plate 116. Bark of old trees deeply furrowed, dark gray brown; 

 twigs at the end of the season gray, brown or reddish-brown, when 

 chewed somewhat mucilaginous; buds ovoid, pointed, dark reddish- 

 brown; leaves ovate to orbicular, long-pointed or sometimes rounded 

 at the apex, dark green above, a lighter green beneath, leaf blades 

 5-15 cm. (2-6 inches) long, smooth above and beneath at maturity, 

 or with scattered hairs and tufts of brown hairs in the axils of the 

 veins beneath, sharply toothed, the teeth ending in a gland; peti- 

 oles 1/3 to 3^ as long as the blades; flowers appear when the leaves 

 are almost mature, June or July; bracts of the peduncles very vari- 

 able, adhering to the peduncle for about half their length, about 

 8 cm. (3 inches) long and 1-3 cm. {%-! inch) wide, rounded at the 

 apex, wedge-shaped or rounded at the base, smooth above and 

 below; fruit woolly, globose, about 6 mm. {}i inch) in diameter. 



Distribution. New Brunswick west to Manitoba and south to 

 Georgia and Texas. More or less frequent to common in rich soil 



