trip] 



Wt)t treasury at 380tanp. 



-z=n 



1174 



dered a good forage species there. It is ra- 

 ther too tender for the climate of Britain, 

 where it is either killed or much hurt du- 

 ring severe winters. [D. MJ 



TRIPTERIS. A genus of herbs or un- 



dershrubs of the family Composites, natives 

 of Arabia and the Cape of Good Hope. The 

 plants are frequently dotted over with 

 glands, secreting an odoriferous sub- 

 stance, Mice that of the common marigold. 

 The heads of flowers are at the ends of the 

 branches, and are surrounded by an invo- 

 lucre of one or two rows of scales, that are 

 frequently membranous at their margins. 

 | The receptacle is naked, flat, or somewhat 

 j convex. The florets of the ray are strap- 

 I shaped, yellow white or purplish ; those of 

 ! the disk tubular, yellow. The fruits of 

 the central or disk-florets are abortive, 

 those of the ray three-sided and winged at 

 the angles, provided with a hollow beak, 

 closed by a thin membrane ; at other times 

 the fruits are wingless, and have a solid 

 beak. The pappus is always absent. The 

 name is given in allusion to the winged 

 fruit. [M. T. M.1 



TRIPTEROCOCCUS. A genus of Aus- 

 tralian and Tasmanian herbaceous plants, 

 of the family Stackhousiacece. The branch- 

 es are somewhat four-sided ; the leaves 

 very narrow, with two stipules ; and the 

 flowers in terminal spikes ; calyx with a 

 distended tube, its limb five-parted j petals 

 five, their claws cohering so as to form a 

 tube, and their limbs spreading ; stamens 

 five, inserted with the petals into the 

 throat of the calyx ; ovary three-lobed 

 three-celled, each cell with a single erect 

 ovule; style cylindrical; fruit of three 

 winged iudehiscent carpels, ultimately 

 separating from a central column. The 

 sen eric name alludes to the three winded 

 fruits. [M. T. M.J 



TRIPTEROTTS. Three-winged. 



TRIPTILIOX. A genus of Chilian herbs 

 of the family Compositce. The leaves are 

 rigid, membranous, pinnately divided, and 

 spiny ; and the flower-heads nre aggregated 

 in tufts, each one surrounded by an in- 

 volucre of two rows of bracts, the outer of 

 which are spreading leathery and spine- 

 pointed, and the inner erect and membran- 

 ous. The receptacle is covered with fringed 

 hairy scales; corollas two-lipped, the outer 

 lip three-toothed, much wider than the 

 inner one ; fruits angular, smooth or hairy ; 

 pappus of three to five-parted fringed 

 scales, recurved at the points. The flowers 

 are white or blue. Some of the species are 

 grown as annuals for the sake of their 

 pretty flowers. The generic name is derived 

 from treis 'three' and ptilon 'a wing,' in 

 allusion to the pappus. [M. T. M.] 



TRIPTOLEJLEA. In hisrecent synopsis 

 of the Dalbergiece {Leguminosce),TA.T. Ben- 

 tham has combined the genus Triptolemcea, 

 originally founded upon a group of ex- 

 clusively Brazilian plants, with Palbergia, 

 an extensive genus common to the tropics 

 | of both hemispheres. As a section of this 



latter genus, the Triptolemceas are charac- 

 terised by their cymes of numerous ex- 

 tremely small flowers, which, by imperfec- 

 tion, are of one sex only, and have the 

 calyx-teeth blunt and the petals furnished 

 with short claws, their ten stamens being 

 united into a sheath -slit on the upper side, 

 ! and their ovary containing only one ovule ; 

 j and also by their pods being hardened, and 

 i strongly marked with netted veins at the 

 ! seed-bearing part. Nine species have been 

 ; described, but they are now reduced to 

 ! three. These are trees or woody climbers, 

 with alternate unequally pinnate leaves, 

 ! composed of a variable number (Ave to 

 j twenty-five) of oblong leathery leaflets.usu- 

 I ally shining, and marked with netted veins 

 i on the upper surface. The true Rosewood 

 ! of commerce, that imported from Brazil, 

 i was for a long time supposed to be the pro- 

 j duce of this genus, upon the authority of 

 I the French travellerand botanist wuillernin, 

 i who brought from Brazil specimens of two 

 ] species of Triptolemcea as the true rosewood 

 plant; but according to Dr. Allemao of 

 Rio Janeiro, the greater part of the best 

 kind of rosewood sent to Europe is the 

 timber of Dalbergia nigra, while other qua- 

 lities are the produce of species of Ma- 

 chcerium. [A. S.] 



TRIQUE-MADAME. (Fr.) Sedum album; 

 also S. acre. 



TRIQTJETER, TRIQUETROUS. Three- 

 edged, or three-cornered. 



TRISECTED. Cut deeply into three parts. 



TRISERIAL. In three rows. Instead 

 of 'serial,' the word fariam is generally 

 affixed to a Latin numeral ; thus, trifariam 

 (trifarious), in three rows. 



TRISETARIA. A genus of grasses be- 

 longing to the tribe Avenece, which con- 

 tained one species, T. linearis, now included 

 in Trisetum. [D. M.] 



TRISETUM. A genus of grasses belong- 

 ing to the tribe Avenece. The inflorescence 

 is panicled ; spikelets two to four-flowered; 

 glumes two, membranous and pointed, 

 rarely awned; lower pales with two short 

 bristles, awned at the back ; the upper 

 keeled with a twisted awn ; stamens three; 

 styles two; ovary smooth. This genus is 

 nearly allied to the oat-grass, and includes 

 nearly seventy species. These are widely 

 distributed over the different quarters of 

 the globe. They are chiefly natives of the 

 temperate zones, where some of them are 

 useful pasture grasses. The British repre- 

 sentatives of the genus are T. pubescens and 

 T. flavescens, both superior kinds and use- 

 ful for agricultural purposes, particularly 

 the latter, which generally forms a portion 

 of all productive meadows. [D. M.] 



TRISPORIC. Applied to bodies com- 

 posed of three spores. 



TRISTACHYA. A genus of grasses be- 

 longing to the tribe Avenece. The inflo- 

 rescence is panicled ; spikelets two-flower- 

 ed, the inferior male or neuter, the supe- 

 rior stalked hermaphrodite, bearded at the 



