176 



THALIA— TIGRID A. 



beton"icum, has loose spikes of fragrant 

 crimson flowers. Ex. 

 TIIA'LIA. 1—1. (.Orchidecc.) [In honor of 



John ThaliDs.] 



dealha'ta, (p. Au. 2|.) spatha 2-flowered ; 

 leaves ovate, revolute at the summit ; pani- 

 cle white-pulverulent. S. 

 THALIC'TRUM. 12—12. {Ranunculacea:.) 



[From thaUo, to flourish.] 



dio'icum, (meadow rue, w-r. M. ll) flow- 

 ers dioecious ; filaments filiform ; leaves 

 about 3-ternate ; leafets roundish, cordate, 

 obtusely lobcd, glabrous ; peduncles axilla- 

 ry, shorter than the leaves. 1-2 f. 



puLcs"ccns, (w. Au. 21:) leafets woolly, 

 lobed, margin revolute, finely pubescent 

 beneath. 



cormi'ti, (g-y. Ju. 2J[.) leaves decompound; 

 .eafets ovate, obtusely 3-lobed, glaucous be- 

 neath, with the nerves scarcely prominent ; 

 flowers mostly dicecious ; filaments sub- 

 clavate ; fruit sessile, striate. 2-5 f. Wet 

 grounds. 



clava'tum, (!]!.) leaves glabrous, without 

 stipes; flowers moncecious; filaments cla- 

 vate ; pencarp compressed, with a very 

 short style. S. 



alpi'uum, a dwarf species, 



TIIAS'TIUM. 5—2. (UmbeUiferecs.) [From 



the isle of Thaspia.] 



act<sifo'linm, (Ju. 2X) leaves gash-biter- 

 nate ; segments oval, equally dentate ; um- 

 bels sub-verticillate ; lateral ones sterile. 3 

 f. Canada. 



atropurpu'reum, (p. J. 2/-) radical leaves 

 petioled, cordate, undivided ; cauline ones 

 gash-pinnate ; segments 3 to 7, short petio- 

 led, ovate, oblong, all cartilaginous-dentate. 

 2-3 f. 

 THE'A. 12—1. (Melia:.) [A Chinese name.] 



hohe'a, (bohca tea, M. Ip .) flowers 6-petal- 

 led ; leaves oblong-oval, rugose. From 

 China and Japan. 



vir'^idis, (green tea, Tp .) flowers 9-petal- 

 led ; leaves very long-oval. Ex. 

 THER"MIA. 10—1. (Leguminosop.) [From 



thermos, temperature ; a plant of warm cli- 

 mates.] 



rhovihifo'lia, (y. 2|.) leaves ovate-rhom- 

 boid, silUy-pubescent beneath ; stipules 

 leaf-like, roujid, ovate, oblique, shorter than 

 the petiole ; flowers racemed. <§. 



TIIE'SIUM. 5—1. {JEleagni.) [From a Greek 



word .signifying garland.] 



umhcUa'ium, (false toad-flax, w. g. J. 2^.) 

 erect; leaves oblong; umbels axillary, 3-5- 

 flowered ; peduncles longer than the leaves. 

 y-15 i. 

 TIILAS'TI. 14—1. (Cruciferw.) iTromthlao, 



to break, so called because it appears bro- 

 ken.] 



hursa-pasto'ris, (shepherd's-purse, w. M. 

 0.) hirsute ; silicles deltoid, obcordate ; rad- 

 ical leaves pinnatifid. 



arvetif'se, (penny-cress, w. J. 0.) leaves 

 oblong, sagittate, coarsely toothed, smooth ; 

 pouch sub-orbicular, shorter than the pedi- 

 cel ; its wings dilated longitudinally ; flow- 

 ers in a raceme. 1 f 



tubero'sum, (Ap. 0.) flowers large, rosa- 

 "floua : stem 4-5 inches high, simple, pubes- 



cent; upper leaves sessile ; radical leaves 

 long-petioled ; root tuberous , pouch orbic- 

 ular. 



alUa'ccum, (©.) leaves oblong, obtuse 

 dentate, glabrous ; silicle sub-ovate, ventri 

 cose. Introduced. 



THU'JA. 19—15. (ConifercR.) [From 'ikuifl 

 odor, so called from its fragrant .smell. j 

 occidenta'lis, (American arbor-vita% M 



"^ .) branches ancipetal ; leaves imbricated. 



in 4 rows, ovate-rhomboid al ; strobiles ob- 



ovate. Mountains. A small tree with 



very tough branches. Leaves resembling 



scales. 

 gigan"tea, leaves imbricate 4-ways, ovate, 



obtusish, closely incumbent, sub-equal ; 



strobiles loose ; scales oboval, 200 feethigli, 



and 12 feet in diameter. 



arlicvla'ta, produces the gum Sandarach; 



the wood is said to resist iire, and is also 



supposed to be the sandal-wood of the an 



cients. 



TIIY'MUS. 13—1, (Labiatcc.) [From thuma 



odor.] 



vnlga'rh, (thyme, b-p. J. 2X-) erect ; leaves 

 ovate and linear, revolute ; flowers in a 

 whorled spike. Ex. 



serpyVlum, (wild thyme, b-p. J. 2X-) stems 

 branched, creeping ; leaves elliptic-ovate 

 obtu.se, flat, petioled. cihate at base ; flow- 

 ers capitate. 4-8 i. Naturalized. 



la7ingino'sus, (lemon thyme, 2^. ^ .) stem 

 creeping, hirsute ; leaves obtuse, villose : 

 flowers capitate. Ex. 



grandijlo'ra, very ornamental. Ex. 



THY'SANOCAR"PUS. 14—1. (Cruciferm.) 



[From thasanos, fringe, and karpos, fruit, the 



pods having fringe on the edge.] 



curvi'pe!^, flowers racemed, small ; leavet 

 mostly radical, pinnatifid ; silicle pendulous 

 stem solitary, erect. West of E/Ocky Mouo 

 tains. 



ohlongifo'lius, silicles nearly orbicular 

 wingless, hispid, with uncinate hairs ; pe 

 tals about half as long as the calyx ; leaves 

 oblong, toothed, densely and stellatelj 

 hirsute. Oregon. 



TIAREL"LA. 10—2. {Saxifragae.) [From 



tiara, an ornament for the head.] 



cordifo'lia, (mitre-wort, w. M. 2^.) leaves 

 cordate, acutely lobed, dentate; teeth mu- 

 CTonatc ; scape racemed ; petals with long 

 claws ; flowers in a simple terminal raceme 

 Shady wood.?. 8-10 i. 



vietizic'sii, (IX-) leaves ovate, heart-shap 

 ed, acute, lobes .short, dentate ; cauline 

 ones alternate, distant; raceme filiform, 

 somewhat spiked ; calyx tubular. 1 f. 



trifolia'ta, {11.) leaves ternate ; leafeta 

 sub-rhomboid, serrate, pilose ; racemes ter 

 minal ; small corymbs of flowers alternate • 

 calyx campanulate. 



TIGA'REA. .11— 1. {Rosacea-.) 



iridcnta' ta, (y. Ju. Tp.) leaves crowded 

 towards the ends of the branches, 3-toolh- 

 ed, villose above, hoary-tomentose beneath , 

 flowers terminal, solitary. S. 



TI'GRIDIA. ]5— 3. {Iridece.) [So called from 

 its spotted appearancfi, resembling a tiger.] 

 ensifor"7nis, (tiger flower,) spatha 2-1. -av 



