TH U 



OR, BOTANICAL DICTIONARY. 



THY 



671 



taken out and treated as the first species. They ought not 

 to be planted near, but so as to be protected by other trees. 

 The plants raised either from layers or cuttings, having got 

 sufficient roots, transplant them to a border screened from 

 the mid-day sun, in rows two feet and a half asunder, and 

 one foot in the row; water them at planting, and repeat it 

 once in five or six days in dry weather, and let them remain 

 two years in the same situation : then remove them again, 

 cutting a very little from the ends of the roots. Plant them 

 in rows three feet and a half asunder, and two feet distance 

 in the row, to continue three years, when they will be of a 

 proper size to transplant wherever they are finally to remain. 

 This tree, when large, is as patient of removal as any other 

 evergreen ; while young, it is a little more delicate, and slower 

 of growth than the first species, and grows better from seeds 

 than from layers or cuttings. 



3. Thuja Articulata ; African Arbor- Vita. Strobiles four- 

 cornered, four-valved ; fronds compressed, jointed, leafless. 

 This is a low shrub, growing only from two to six feet high 

 in a dry soil ; branches round, alternate, spreading at a right 

 angle. Broussonet asserts, that the resin, commonly called 

 Sandarac, flows from this tree in the neighbourhood of Mo- 

 rocco. Native of Mount Atlas, and barren hills in Barbary. 



4. Thuja Dolabrata ; Japanese Arbor-Vita;. Strobiles 

 squarrose ; leaves imbricate three ways, beneath excavated 

 and snow-white; branches and branchlets alternate, com- 

 pressed. It is a very large and lofty tree, and the most 

 elegant of all the evergreens. Native of Japan: Thunberg 

 observed it every where by the road-side in Fakonia. 



Thunbergia; a genus of the class Didynamia, order Angio- 

 spermia. GENERIC CHARACTER. Calix : perianth double: 

 outer two-leaved ; leaflets ovate, obtuse, five-nerved, almost 

 the length of the tube : inner one-leafed, many-parted ; seg- 

 ments equal, ovate, very obtuse, three times as short as the 

 tube. Corolla: one-petalled, bell-shaped; tube dilated up- 

 wards ; border of five deep obovate segments, half the length 

 of the tube. Stamina: filamenta four, inserted into the tube 

 above the base, unequal, the two lower shortest, the two 

 upper shorter than the tube; antheree ovate, adnate. Pistil: 

 germen superior, roundish ; style filiform, a little shorter than 

 the tube, erect; stigma two-lobed. Pericarp: capsule glo- 

 bular, beaked, smooth, two-celled, opening longitudinally ; 

 beak compressed, grooved, linear, obtuse ; partition obovate, 

 emarginate, perforated below the top, membranaceous at the 

 sides, permanent. Seeds: in each cell two, reniform, wrinkled, 

 convex on one side, concave on the other, with a longitudinal 

 groove. Observe. It agrees in many circumstances with 

 the Barlerias. The leaflets of the exterior calix are named 

 bractes by Thunberg, from whom this genus has received its 

 name. ESSENTIAL CHARACTER. Calix : double ; outer two- 

 leaved ; inner many-toothed. Corolla : bell-shaped. Cap- 

 sule: beaked, two-celled. The species are, 



1. Thunbergia Capensis. Leaves ovate, obtuse; stem 

 diffused. This is a singular plant, which no one would sup- 

 pose to be different from the Barlerias, if he did not attend 

 to the double calix. Stem four-cornered, hirsute; pedun- 



iles length of the leaves or longer, solitary, one-flowered ; 

 orolla yellow; capsule smooth, awl-shaped, two-parted. 

 -Native of the Cape. 



2. Thunbergia Fragrans. Leaves cordate, acuminate, 

 amewhat angular-toothed at the base ; stem scandent. The 



ots consists of many thick woody fibres ; flowers large, of 

 lie purest white. This plant, which, Willdenow remarks, has 

 Reappearance of Convolvulus Sepium, is common in hedges, 

 mong bushes, on the banks of water-courses, about Samul- 

 Dttah in the East Indies. It flowers during the vret and 

 VOL. n. 122. 



cold seasons, and, when cultivated, throughout the year. The 

 herb possesses a peculiar and agreeable fragrance ; and the 

 beauty of its flowers, though they are not fragrant, entitles it 

 to a place in the flower-garden. 



Thymbra; a genus of the class Didynamia, order Gymno- 

 spermia. GENERIC CHARACTER. Calix: perianth one- 

 leafed, subcylindrical, keeled at the sides, two-lipped at the 

 mouth ; upper lip wider, half three-cleft, equal, converging ; 

 lower narrower, two-parted. Corolla: ringent; tube sub- 

 cylindrical; upper lip flat, straight, half two-cleft, obtuse; 

 lower three-cleft, almost equal, flat. Stamina: filamenta 

 four, filiform, approaching by pairs, the two lower ones 

 shorter; antherae two-lobed ; lobes remote, under the upper 

 lip of the corolla. Pistil: germen four-cleft; style filiform, 

 half two-cleft ; stigmas two, acute. Pericarp : none, the 

 calix unchanged. Seeds: four. ESSENTIAL CHARACTER. 

 Calix: subcyliudrical, two-lipped, scored on each side with 

 a villose line. Style : semibifid. The species are, 



1. Thymbra Spicata; Spiked Thymbra. Flowers spiked; 

 leaves lanceolate. Stem shrubby, very bushy, about a foot 

 high, with numerous, upright, simple, leafy, purplish, qua- 

 drangular branches. The stalks are terminated by thick close 

 spikes of purple flowers, nearly two inches long ; they appear 

 in June and July, and in warm seasons they are sometimes 

 succeeded by seeds, which ripen in autumn. Native of 

 Mount Libanus, Macedonia, Spain, and the county of Nice. 

 Sow the seeds in the spring on a bed of light earth, and 

 the plants will appear in six or eight weeks. Keep them 

 clean from weeds, and remove them in July, some into small 

 pots, and others into a warm dry border, shading them from 

 the sun, and supplying them with water till they have taken 

 new root. If the winter should prove very severe, cover the 

 plants in the borders with mats or other covering. The pots 

 should be sheltered under a common frame in winter, where 

 they may enjoy the free air in mild weather, and yet be secured 

 from frost. They will nevertheless endure the winter, unless 

 it be very severe, especially in a poor dry stony soil. They 

 may also be increased by slips and cuttings, planted out in 

 the spring and summer. 



2. Thymbra Verticillata ; Whorled Thymbra. Flowers in. 

 whorls ; leaves linear-lanceolate. Stalk shrubby, seldom 

 rising much more than a foot high, putting out many small 

 woody branches, which have narrow spear-shaped leaves with 

 many punctures ; they stand opposite, and are of an aromatic 

 flavour. The flowers grow in whorled spikes at the end of 

 the branches; they 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. They appear about 

 the same time with the first species, and in warm seasons the 

 seeds ripen in England. Native of Spain and Italy. Propa- 

 gated like the first species. 



3. Thymbra Ciliata ; Headed Thymbra. Flowers in head? ; 

 leaves linear, ciliate. This is an elegant, upright, and very 

 branching shrub: the younger branches have a very short 

 down upon them; they are round or scarcely four-cornered, 

 simple or branched, unequal; corolla violet ; tube straight, 

 twice as long as the corolla ; upper lip entire, obtuse, flattish, 

 lower three-lobed ; lobes roundish, entire; stamina scarcely 

 longer than the corolla. Native of Barbary. 



Thyme. See Thymus. 



Thymus; a s;enus of the class Didynamia, order Gymno- 

 spermia. GENERIC CHARACTER. Calix: perianth one- 

 leafed, tubular, half five-cleft into two lips, permanent, hav- 

 ing the throat closed with villose hairs ; upper lip wider, flat, 

 erect, three-toothed; lower lip two-bristled, of equal length. 

 Corolla: one-petalled, ringeut; tube length of the calix; 

 8 II 



