THY 



T II Y 



for planting out in wider nursery-rows : they 

 wav also be planted in pots, and plaecd in a hot- 

 in order to have them more forward. 



They may he planted out into the borders, &c. 

 in the autumn or early spring months. 



They are highly ornamental evergreens, pro- 

 per tor adorning the shrubbery and other parts, 

 having a fine effect also when disposed singly in 

 borders, &c. and in open spaces of grass ; in all 

 of which situations thev should be suffered to 

 grow with their full branches, in their own na- 

 tural way, except reducing with a knife an) tew 

 stra>ia;linir or rambling branches occasionally: 

 this is all the culture they require afterwards. 



They may also be employed a< timber-trees, 

 in the evergreen forest-tree plantations. 



And those in the pots, as the Chinese Arbor 

 Vita?, mav be placed among other potted plants 

 to adorn any particular compartment, and in as- 

 semblage with jreen-hoiise plants for variety. 



THUYA. See Thuja. 



THYMBRA, a genus furnishing plants of the 

 under shrubby, exotic kind. 



It belongs to the class and order Didynamia 

 Gymnospermia, and ranks in. the natural order 

 of VerticiUatce or hahiatce. 



The characters are : that the calyx is a one- 

 leafed perianth, subcylindrical, keeled at the 

 sides, two-lipped at the mouth: upper lip wider, 

 half- three-cleft, equal, converging ; lower nar- 

 rower, two-parted : the corolla is ringent : tube 

 subcvlindrical: upper lip flat, straight, half- two- 

 cleft, obtuse; lower three-cleft, almost equal, 

 flat : the stamina have four filiform filaments, 

 approaching bv pairs : the t.vo lower ones 

 shorter : anthers two-lobed : lobes remote* un- 

 der the upper lip of the corolla : the nistilkim is 

 a four-cleft germ : stvle filiform, half -two-cleft: 

 stigmas two, acute : there is no pericarpium : 

 calyx unchanged : the seeds four. 



The species cultivated are: I. T. spicala, 

 Spiked Thymbra ; 2. T. uerticillata, Whorlcd 

 Thymbra. 



The first is a low shrubby plant like heath, 

 branching out into slender woody stalks which 

 arc six or eight inches long, covered with a 

 brown bark, and garnished with narrow acute- 

 pointed leaves about half an inch long, sitting 

 close to the stalks opposite; they have an aro- 

 matic odour when bruised : the stalks are ter- 

 minated bv thick close spikes of purple flower-. 

 near two inches long : the calyxes are stiff and 

 hairy ; they are cut half their length into acute 

 segments : out of these the flowers peep, with 

 their two lips; the upper is concave and arched, 

 the under cut into three equal portions, and 

 these are a little reflexed : they appear ia June 



and July, and in warm seasons are sometimes 

 succeeded by so da w hich ripen in autumn. It is a 

 native of Mount Libanus,Ma 



'1 he second spec: 



seldom rises much more than a toot bigb, 

 ting out many small woody branches', which 

 have narrow spear-shaped leaves with many 

 punctures ; they stand opposite, and arc of an 

 aromatic flavour : the (lowers crow in whorlcd 

 spikes at the end of the branches : the leaves 

 which stand under each whorl are broader than 

 those below, and are covered with fine hairs : the 

 flowers are purple, and sit close to the stalks: the 

 upper lip is concave, and ends with two obtuse 

 points ; the lower ends with three equal points: 

 these appear about the same tune with the other, 

 and in warm seasons the seeds ripen in this 

 climate. It is a native oi Spain and Italy. 



Culture. — These plants may be increased bv 

 seeds, slips, and cuttings. 



The seeds should he sown in the early spring 

 in a warm border, and sheltered from bad 

 weather by glasses ; or, which is better, in pots 

 filled with Tight mould, and placed in a mild 

 hot-bed : when the plants have attained some 

 growth they should be set out or removed into 

 separate pots. 



The slips and cuttings should be planted out 

 in the spring and summer, and when well rooted 

 removed where they are to grow : they also 

 sometimes succeed by bottom offsets planted out 

 as above. 



They afford variety among other potted green- 

 house plants. 



THYME. SeeTHriius. 



1 HYMUS, a genus containing plants of the 

 low, aromatic, perennial kind. 



It belongs to the class and order Didynamia 

 G-mno^permia, and ranks in the natural order 

 of VertidUnta- or Ltdia/<p. 



The characters are : that the calyx is a one- 

 leafed perianth, tubular, half-five-cleft into two 

 lips, permanent, having the throat closed with 

 villosc hairs : upper lip wider, flat, erect, three- 

 toothed : lower lip two-bristled, of equal length : 

 the corolla one-pctalled, ringent; tube 1 

 of the calyx : throat small : "upper lip shorter, 

 flat, erect, emargmate, obtu-e; lower lip longer, 

 spreadiiiiT, wider, irilie 1 , obtuse: middle- 

 men! wider : the stamina have four fllan 

 curved in, two of which are longer: anthers 



small : the pislilliim is a four-parted germ : 

 style filiform: stigma bifid, acute: there i- 

 no pericarpium : calyx narrowed at the neck, 

 cherishing the- seeds in its bosom: ;. « 

 four, small, roundish. 



The species cultivated are : 1. T. St-rpi 



