X. TILIA‘CEE: TILIA. 69 
Varieties. Those which we shall give as such are described in the Flora of 
Torrey and Gray as species ; but with the following remark, which we think 
fully justifies us in not considering them more specifically distinct than the 
different alleged species of the European lime. “ There is great uncertainty 
respecting the synonymes. Indeed, nearly all the characters which have 
been employed for distinguishing them are either inconstant, or are common 
to them all, A careful examination of the flowers in the living plants may 
afford more certain marks of discrimination.” 
4 T. a. 2 heterophylla. T. heterophylla Vent., Pursh, Dec. Prod., Tor. 
§ Gray.— A tree of 30 ft. to 50 ft. high, found on the banks of the 
Ohio and Mississippi, and introduced in 1811. Leaves glabrous and 
deép green above, very white and velvety tomentose beneath ; the 
veins dark-coloured, and nearly glabrous, with coarse mucronate scr- 
ratures. Petals obtuse, crenulate. Staminodia spatulate, entire. 
Style hairy at the base. (Tor. and Gray, i. p. 240.) Leaves 4 in. 
to 8in. in diameter, very oblique, and more or less cordate, with a 
short abrupt acumination ; somewhat shining above: the veins on 
the under surface very conspicuous, in contrast with the white pu- 
bescence. Cyme few-flowered, loose. Style longer than the petals. 
Ibid. 
x a a. ih T. alba Michz., Tor. § Gray; T.\axiflora Pursh. (The 
plate of this tree in Arb. Brit., Ist ed., vol. v.; and our fig. 103.)— A 
103, Tilia americ&na Alba. 
large tree in Pennsylvania and Maryland. Height 30 ft. to 50 ft. 
Introduced in 1820. Flowers yellowish white, very pale; June. 
Leaves 3in. to 4 in. in diameter, with a short abrupt acumination, 
cordate, somewhat unequal at the base; the under surface rather 
thinly pubescent, very pale, but scarcely white. Staminodia (scales) 
two thirds the length of the petals. Filaments slightly pentadel- 
phous. (Tor. and Gray, i. p. 240.) We have only seen this tree in 
the H. S., where, 10 years planted, it was about 10 ft. high in 1837. 
% T. a. 4 pubéscens. T. pubéscens dit., Vent., Tor. & Gray. (The plate 
of this tree in Arb. Brit., Ist ed., vol. v.; and our fig. 104.)— A large 
tree found in Carolina and Florida, along the sea coast. Height 
50 ft. to 70ft. Introduced in 1726. Flowers pale yellow; June. 
Leaves 3 in. to 4in. in diameter; the under surface, when young, 
rather paler than the upper, but at length nearly the same colour; 
serratures broad and short. ( ae and Gray, i. p. 240.) 
F 
