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CLASS XII.— POLYANDRIA. 
ORDER I. MONOGYNIA. 
237. TILTA. Gen. pi. 894. {Tiliacece.) 
Calix inferior^ 5-parted^ deciduous. Petals 
5. Immature capsule 5-celled^ 5-valved^ 
cells 1 or S-seeded ; mature capsule cori- 
aceous^ globose^ 1 -seeded^ bursting at the 
base. — ^ utt. 
glabra. 1. T. Icavcs suborbiculate, cordate^ abruptly acumi- 
nate, narrowly serrate, subcoriaceous, smooth ; 
petals truncate at the end, crenate, the style 
nearly equal to the petals f nut ovate, subcos- 
tate. — Ventenat. 
T. Americana, Willd. 
T. Caroliniana, Wangh. Amer. 56. (Pursh.) 
T. Canadensis, Mich. 
Icon. Mich. Arbr. forest, vol. 3. p. 311. t. 1. 
Lime-tree. Linden-tree. Bass-wood. Spoon-wood. 
A well-known tree under the above appellations. Frequent 
on the country seats of this neighbourhood, and planted occa- 
sionally in the streets of this city. I 2 . May, June. 
238. HELIANTHEMUM. Juss. Gen. pi. 326. (Cisti.) 
Segments of the calix mostly unequal, the 2 
exterior smaller. Petals 5. Capsule, su- 
perior, 1 -celled, 3-valved, valves septife- 
rous in the centre. — JM* utt. 
canadense. 1. H. without stipules, erect; leaves alternate, 
erect, linear-lanceolate, flat, tomentose beneath; 
racemes terminal, few-flowered ; calicine seg- 
