144 
THALICTRUM-TILLANDSIA. 
THALICTRUM. IS— 13. (IlanunculacecB.) [From thallo, to flourish.] 
dio'icum, (meadow rue, "w-r. M. 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. %.) leafets woolly, lobed, margin revolute, finely pubes- 
cent beneath. 
THEA. 12—1. (Meli(B.) [A Chinese name.] 
boke'a, (bohea tea, M. flowers 6-petalled ; leaves oblong-oval, rugose. 
From China and Japan. 
vir"idis, (green tea, T^.) flowers 9-petalled ; leaves very long-oval. Ex. 
THERMIA. 10—1. {LeguminoscB.) [From thermos, temperature ; a plant of warm climates.] 
rhomhifo'lia, (y. Ij..) leaves ovate-rhomboid, silky-pubescent beneath ; sti- 
pules leaf-like, round, ovate, oblique, shorter than the petiole ; flowers ra- 
cemed. S. 
THESIUM. 5—]. (jEleagni.) [From a Greek word signifying garland.] 
umhella'tum, (false toad-flax, w. g. J. "21..) erect; leaves oblong; umbels axil- 
lary, 3-5-flowered; peduncles longer than the leaves. 9-15 i. 
THLASPI. 14 — 1. {Cruciferod.^ [From ^AZao, to break, so called because it appears broken.j 
hursa-pasto'ris, (shepherd's-purse, w. M. ©.) hirsute ; silicles deltoid, obcorr 
date ; radical leaves pinnatifid. 
arven"se, (penny-cress, w. J. ©.) leaves oblong, sagittate, coarsely toothed, 
smooth; pouch sub-orbicular, shorter than the pedicel; its wings dilated 
longitudinally ; flowers in a raceme. 1 f. 
Uibero'sum, (Ap. ©.) 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. iConiferoi.) [From ^Awon, odour, so called from its fragrant smell.] 
occidenta'lis, (American arbor-vitae, M. T^.) branches ancipetal; leaves im- 
bricated, in 4 rows, ovate-rhomboidal ; strobiles obovate. Mountains. A 
small tree with very tough branches. Leaves resembling scales. 
THYMUS. 13—1. iLabiatcB.) [From f/mma, odour.] 
vulga'ris, (thyme, b-p. J, %) erect ; leaves ovate and linear, revolute ; flow- 
ers in a whorled spike. 
TIARELLA. 10—2. {SaxifragcB.) [From Zmra, an ornament for the head.] 
cordifo'lia, (mitre-wort, w. M. %.) leaves cordate, acutely lobed, dentate ; 
teeth mucronate; scape racemed; petals with long claws; flowers jn a sim- 
ple terminal raceme. Shady woods. 8-10 i. 
TIGARIA. 11—1. iRosacecB.) 
tridenta'ta, (y. Ju. T2 ) leaves crowded towards the ends of the branches, 3- 
toothed, villose above, hoary-tomentose beneath; flowers terminal, solita- 
ry. S. 
TIGRIDA. 15—3. {Iridem.) [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,.) [From^ie^eo, the Greek name.] 
gla'hra, (bass-wood, lim-e-tree, y-w. Ju. T^.) 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 
water, S. 
MsneoHdes, 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. 
