1165 



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prised under this genus of Meliacece, but 

 they are now referred to other genera, as 

 also are several of the American species; 

 and Trichilia is restricted to two or three 

 African and a dozen or more American 

 andWest Indian species, some of which are 

 trees, and others erect or climbing shrubs. 

 Their leaves are unequally pinnate, or rare- 

 ly trifoliolate; and their flowers, which 

 are borne in axillary panicles, have a four 

 or five-cut calyx, as many egg-shaped or 

 oblong overlapping petals, an eight or ten- 

 parted stamen-tube, with narrow blunt 

 segments bearing terminal anthers, and a 

 three-celled ovary containing two ovules 

 side by side in each cell. Their fruit is a 

 three-celled capsule, which -when ripe 

 splits into three valves, each of which has 

 a partition down the middle, with a seed, 

 covered with a pulpy aril, on either side 

 of it. T. emetica, the Roka of the Arabs, is 

 a large tree with pinnate leaves composed 

 of four pairs of smooth elliptical leaflets 

 and an odd one, and dense panicles of 

 whitish flowers like those of the citron. 

 In an Arabic work, quoted by Forskahl, 

 the fruits are culled ' Djouz elkai,' and are 

 said to possess emetic properties. The 

 Arabian women mix them with the per- 

 fumes used for washing their hair ; while 

 the ripe seeds are made into an ointment 

 with sesamum-oil, and used as a remedy 

 for the itch. [A. SJ 



TRICHINIUM. A genus of Amarantha- 

 cece, consisting of annual or perennial 

 herbs, natives of Tropical and Extratro- 

 pical New Holland. The flowers are in 

 terminal heads, or spikes provided with 

 three shining bracts to each flower ; the 

 perianth consists of five linear segments; 

 stamens five, coherent at the base ; ovary 

 one-celled, with one erect ovule ; style 

 simple ; fruit utricular, included within 

 the perianth. Some of the species are ex- 

 tremely ornamental. [M. T. MJ 



TRICHOCARYA. This genus of Chry- 

 sobalanacece includes a number of trees or 

 shrubs growing in the islands of the In- 

 dian Archipelago. The leaves are feather- 

 veined, and the flowers grow in clusters. 

 The calyx has along cylindrical or angular 

 tube, expanding above into a somewhat 

 cup-shaped limb, which is divided into five 

 triangular segments; the petals are ovate, 

 acute, shorter than the sepals; the sta- 

 mens numerous, perigynous; and the 

 ovary is enclosed by the tube of the calyx, 

 one-celled, with a single ovule, and a 

 basilar style. Fruit succulent externally, 

 bony within, globose above, constricted 

 and three-sided below ; the stone is one- 

 seeded, and very hairy in the interior. 

 From this latter circumstance the genus 

 takes its name.derived from the Greek thrix 

 ' a hair," and karua ' a nut.' [M. T. MJ 



TRICHOCEXTRUM. A genus of orchids, 

 belonging to the tribe Varidece, inhabiting 

 South and Central America. They are epi- 

 phytal stemless herbs, with broad promi- 

 nently-veined leaves, and axillary flow- 

 ers. The sepals and petals are spreading, 



free, equal ; the lip sessile, connate with 

 the base of the column, furnished with a 

 long spur, two-lobed. It comes near CEceO' 

 eludes, from which it differs in its lip being 

 united at the base with the column, and 

 in the latter being furnished with two ears 

 or wings. [W. B. H.] 



TRICHOCLADUS. A genus of Hamame- 

 lidacece, containing four species of villose 

 shrubs, with shortly petiolate and entire 

 leaves, and flowers in axillary or terminal 

 pedunculate heads. The flowers are dioe- 

 cious from the abortion of parts. The 

 calyx-tube is connate with the ovary below, 

 but divides into five lobes above; the epi- 

 gynous corolla has five long linear petals ; 

 the five stamens are inserted on the petals, 

 and have very short filaments; the ovary 

 is two-celled, with a single ovule in each 

 cell; and there are two distinct styles. 

 The species are natives of the Cape of Good 

 Hope. [W. C] 



TRICHOCLINE. A genus of Composites, 

 consisting of Brazilian perennial herba- 

 ceous plants, with leaves clustered near the 

 bases of the simple stems. The head of 

 flowers is terminal and solitary, surround- 

 ed by an involucre which is bell-shaped, 

 consisting of an outer row of leafy scales, 

 and an inner series of membranous ones. 

 The receptacle is covered with fine fringe- 

 like hairs. The corollas are two-lipped, the 

 central ones equally so, the outer with the 

 exterior lip largest. Achenes top-shaped, 

 surmounted by a pappus of numerous scaly 

 serrated hairs. [M. T. M.] 



TRICHOCORONIS. By this name is de- 

 signated a genus of Compositee, consisting 

 of herbs growing in marshes and moist 

 places in Texas. The stems are creeping 

 at the base ; the branches sticky ; the 

 leaves amplexicaul ; the flower-stalks slen- 

 der, naked, solitai-y or corymbose; the 

 flowers rosy or purple, surrounded by an 

 involucre of ten or twelve membranous 

 scales ; and the receptacle conical, naked. 

 The corollas are more or less glandular, 

 tubular below, expanding above into a 

 bell-shaped five-toothed limb; branches 

 of the style projecting, linear, flattened. 

 Achenes pentagonal, surmounted by a 

 short crown-like pappus. [M. T. MJ 



TRICHODESMA. A genus of Boragina- 

 cent, from India, Egypt, and South Africa. 

 They are strigose annuals, with the habit 

 of Borago or Cynoglossum. The corolla is 

 subrotate, with a naked throat ; anthers ex- \ 

 serted, with pointed awns, furnished with j 

 two rows of hairs on the back, by which ' 

 they adhere together ; nuts half immersed 

 in pits in the central column. [J. T. S.J 



TRICHODESMIUM. A genus of Algee 

 belonging to the Oscillator ice, distinguished 

 by their short threads being collected in 

 little fascicles, which float freely, forming 

 a scum upon the surface of the sea. Instead, 

 however, of occurring in circumscribed 

 patches, it covers, without any intermis- 

 sion, oceanic tracts many miles in extent, 

 distinguished by a peculiar red-brown tint, 



