TILIACE.E 



745 



13. Tilia heterophylla Vent. 



Leaves ovate, obliquely truncate or rarely slightly cordate at base, gradually narrowed 

 and acuminate at apex, finely dentate with apiculate gland-tipped teeth, pubescent above 

 when they unfold with caducous fascicled hairs, and at maturity dark green and glabrous 



Fig. 671 



on the upper surface, covered on the lower surface with thick, firmly attached, white or on 

 upper branches often brownish tomentum, and usually furnished with small axillary tufts 

 of rusty brown hairs, 3'-5' long and 2'-2f wide; petioles slender, glabrous, l|'-lf in 

 length. Flowers \' long, opening in early summer, on pedicels pubescent with fascicled 

 hairs, in wide mostly 10-20-flowered pubescent corymbs; peduncle glabrous, the free por- 

 tion iV~&' m length, its bract narrowed and rounded at apex, unsymmetrically cuneate at 

 base, pubescent on the upper surface, tomentose on the lower surface when it first appears, 

 becoming glabrous, 4'-6' long and I'-l^' wide, nearly sessile or decurrent to within 1|' of 

 the base of the peduncle: sepals acuminate, pale-pubescent on the outer surface, villose on 

 the inner surface and furnished at base with a tuft of long white hairs; petals lanceolate, 

 acuminate, a third longer than the sepals; staminodia oblong-ovate, acute, sometimes 

 notched at apex; style villose at base with long white hairs. Fruit ellipsoid, apiculate at 

 apex, covered with rusty brown tomentum, about ' long. 



A large tree with slender, glabrous, reddish or yellowish brown branchlets and oblong- 

 ovate slightly flattened glabrous winter-buds %'-%' in length, the outer scales slightly cili- 

 ate at apex. ' 



Distribution. White Sulphur Springs, Greenbrier County, West Virginia; Piedmont 

 region of North and South Carolina and Georgia; near Tallahassee, Leon County, River 

 Junction, Gadsden County, and Rock Cave, Jackson County, Florida; near Selma and 

 Berlin, Dallas County, Alabama; Vevay, Switzerland County, and near the Ohio River, 

 Jefferson County, Indiana; not common. Passing into the var. amphiloba Sarg., differing 

 from the type in the fascicled hairs on the upper surface of the young leaves and in the often 

 pubescent branchlets; woods in sandy soil near River Junction, Gadsden County, Florida, 

 and Valley Head, DeKalb County, Alabama; and into var. nivca Sarg., differing from the 

 type in the white tomentum on the lower surface of the leaves, the glabrous styles, in the 

 tomentum on the lower side of the floral bract when the flowers open, the pubescent gray or 

 pale reddish brown branchlets and in the puberulous winter-buds: deep woods, River Junc- 

 tion, Gadsden County, Florida. More important is 



