144 
TK ALICTRUM—TILL AND SI A. 
TKAUCTRUM. 12—13. {Ranunculacece.) [From i [hallo, to flourish.] 
dio'icum, (meadow rue, w-r. M. 'll-.) flowers dioecious; filaments filiform; 
leaves about 3-ternate; leafets roundish, cordate, obtusely lobed, glabrous; 
peduncles axillary, shorter than the leaves. 1-2 f. 
pubes"cens, (w. Au. A|_.) leafets woolly, lobed, margin revolute, finely pubes¬ 
cent beneath. 
THEA. 12—1. ( Melicb .) [A Chinese name.] 
bohe'a , (bohea tea, M. by) flowers 6-petalled ; leaves oblong-oval, rugose. 
From China and Japan. 
vir"idis, (green tea, by) flowers 9-petalled ; leaves very long-oval. Ex. 
THERMIA. 10—1. (L eguminosce.) [From thermos , temperature ; a plant of warm climates.] 
rliombifo'lia , (y. AJ..) leaves ovate-rhomboid, silky-pubescent beneath; sti¬ 
pules leaf-like, round, ovate, oblique, shorter than the petiole; flowers ra- 
cemed. & 
THESIUM. 5—1. ( JEleagni .) [From a Greek word signifying garland.] 
umbella'tum , (false toad-flax, w. g. J. A],.) erect; leaves oblong; umbels axil¬ 
lary, 3-5-flowered; peduncles longer than the leaves. 9-15 i. 
THLASPI. 14—1. ( Cruciferce .) [From tklao, to break, so called because it appears broken.] 
bursa-paster is . (shepherd’s-purse, w. M. fv>.) hirsute; silicles deltoid, obcor- 
date ; radical leaves pinnatifid. 
arven"se , (penny-cress, w. J. 0.) leaves oblong, sagittate, coarsely toothed, 
smooth; pouch sub-orbicular, shorter than the pedicel; its wings dilated 
longitudinally ; flowers in a raceme. 1 f. 
tuber o' sum, (Ap. 0.) flowers large, rosaceous; stem 4-5 inches high, simple, 
pubescent; upper leaves sessile; radical leaves long-petioled; root tuber¬ 
ous ; pouch orbicular. 
THUJA. 19—15. ( Conferee .) [From thuon, odour, so called from its fragrant smell.] 
Occident a 1 lis , (American arbor-vitae, M. by) branches ancipetal; leaves im¬ 
bricated, in 4 rows, ovate-rhomboidal; strobiles obovate. Mountains. A 
small tree with very tough branches. Leaves resembling scales. 
THYMIJS. 13 — 1. ( Labiates .) [From thuma, odour.] 
vulga'ris , (thyme, b-p. J. A|_.) erect; leaves ovate and linear, revolute ; flow¬ 
ers in a whorled spike. 
TIARELLA. 10—2. {Saxifrages.) [From tiara, an ornament for the head.] 
cordifo'lia , (mitre-wort, w. M. A|_.) leaves cordate, acutely lobed, dentate ; 
teeth mueronate; scape racemed; petals with long claws; flowers in a sim¬ 
ple terminal raceme. Shady woods. 8-10 i. 
TIGARIA. 11 — 1. ( Rosacece.) 
tridenta'ta, (y. Ju. by) leaves crowded towards the ends of the branches, 3- 
toothed, villose above, hoary-tomentose beneath; flowers terminal, solita¬ 
ry. S. 
TIGRIDA. 15 — 3. {lride.ee.) [So called from its spotted appearance, resembling a tiger.] 
ensifor'mis, (tiger-flower,) spatha 2-leaved ; two outer petals longer than the 
other four; leaves ensiform, nerved. Mexico. 
TILIA. 12—1. {Tiliacece.) [¥rom.ptelea, the Greek name.] 
gla'bra, (bass-wood, lime-tree, y-w. Ju. by) leaves round-cordate, abruptly 
acuminate, sharply serrate, sub-coriaceous, glabrous; petals truncate at 
the apex, crenate; style about equalling the petals; nut ovate. Large 
tree. Wood soft and white. Leaves often truncate at the base. 
TILLANDSIA. 6—1. {Narcissi.) [Named from Tillandsius, professor of Medicine at Albo.] 
utricula'ta, (wild pine, bladder tillandsia, w.) leaves concave, broad, their 
base enlarged; panicle branching; flowers sessile; stamens longer than 
the corolla. 3 f. The leaves are often found containing nearly a pint of 
u water. S. 
usneo'ides, stem gray, diffuse, filiform, pendulous, branching. Parasitic. From 
its peculiar appearance, suspended from trees to which it has fastened itself, 
it is called old man's beard. 
