trig] 



Kl)t &rea*urg flf 3Satatty. 



1164 



into five indehiscent cells, which are trans- 

 versely divided into from two to four single- 

 seeded compartments. Albumen is but 

 sparingly present in the embryos of this 

 order, but in Tribulus it is altogether want- 

 ing. The species are generally distributed 

 within the tropics of the Old World, and 

 extend into the warmer temperate coun- 

 tries, one species only being found in the 

 South of Europe. [W. C] 



TRICA. A button-like shield belonging 

 to the genus Gyrophora. 



TR1CALYSIA. A genus of CinchonacecB, 



comprising a shrub native of Western 

 Tropical Africa, with hairy flowers, closely 

 crowded in the axils of the leaves. The 

 flowers have, outside the true calyx, a 

 double epicalyx, each portion with four 

 teeth, while the true calyx has a five to six- 

 toothed limb ; the corolla has a short tube, 

 and its Ave or six-parted limb is divided 

 into five or six narrow spreading divisions ; 

 stamens five to six, inserted on to the 

 .throat of the corolla, beyond which they 

 project ; ovary two-celled ; stigmas two, 

 linear. [M. T. M.J 



TRICERA. A genus of West Indian 

 shrubs of the family Euphorbiacece. The 

 flowers are monoecious, disposed in ra- 

 cemes—the male flowers being below, the 

 females solitary at the apex of the raceme. 

 The males have a perianth of four seg- 

 ments, enolosingfourstamens; the females 

 a five-leaved perianth, and three styles, 

 ultimately dividing into six stigmatic 

 branches. The fruit consists of three 

 two-seeded carpels, separating one from 

 the other when ripe. [M. T. MJ 



TRICERANDRA. A supposed genus ! 

 found in Manchuria, now referred to Clrto- 

 ranthus. 



TRICERASTES. A genus of Datiscacece, | 

 consisting of an erect annual herb from [ 

 California, with alternate tripartite serra- 

 ted leaves, having the central lobe pinna- | 

 tifid, and axillary heads of small green j 

 hermaphrodite flowers. The calyx-tube is [ 

 connate with the ovary, with a minute ; 

 three-toothed limb; there is no corolla; 

 three stamens alternate with the calyeine 

 teeth ; and the ovary is inferior, one-celled, I 

 with three parietal placentas and nuine- | 

 rous ovules, and three bipartite styles 

 opposite the calyeine teeth. The capsule 

 is three-valved at the apex. [T. M.] 



TRICEROS. A little-known genus of 

 Loureiro's, apparently terebinthaceous. 

 The original species from Cochin China is 

 the only one referred to it. It is a small 

 tree, with spreading branches, and impari- 

 pmnate and bijugate leaves. The calyx ' 

 and corolla have each five spreading 

 divisions; the five stamens have slender 

 filaments, and ovate two-celled anthers ; 

 there are three short styles; and the berry j 

 is round below, but is furnished above I 

 with three horns, and has three one-seeded 

 cells. [W. CJ j 



TRICHADENIA. A genus of Pangiacea, 



of which only one species, T. zeylanica, is 

 known. This is a very large Cingalese 

 tree, called Tettigaha or Tettigass by the 

 natives ; its wood, however, is of little or 

 no value. It has alternate oblong leaves, 

 and short axillary panicles of small pale- 

 green unisexual flowers, the two sexes 

 being borne on separate trees. The female 

 flowers produce roundish fleshy fruits, 

 about an inch in diameter, containing 

 from one to three bony-shelled seeds, from 

 which the Cingalese extract an oil, useful 

 for burning, and as a remedy for diseases 

 of the skin in children. Both kinds of 

 flowers have an entire calyx, which ulti- 

 mately breaks away irregularly at the 

 bottom, and falls away in a single cap-like 

 piece; and five overlapping petals, with 

 fleshy hairy scales attached to them along 

 the middle on the inside. The males con- 

 tain five stamens, with thick filaments, 

 spirally twisted in the bud, and oblong 

 anthers ; and the females a free one-celled 

 ovary, with three ovules attached to the 

 sides, and bearing three styles with broad 

 kidney-shaped stigmas. [A. S.J 



TRICBLETA. Trisetum. 



TRICHANTHERA. A genus of Zygo- 

 phyllacece, containing a single species— a 

 small and slender plant from Arabia, with 

 alternate stipulate setaceous leaves. The 

 five-cleft calyx is persistent ; the corolla 

 consists of five linear petals ; the five sta- 

 mens have flattened filaments and slender 

 anthers ; the style has five deep furrows, 

 and a capitate stigma; and the ovate and 

 stipitate capsule is obtusely five-sided, and 

 has five many-seeded cells. The single 

 series of stamens is not sufficient to 

 separate this plant from Zygophyllacece, 

 with which order it otherwise altogether 

 agrees; the stipitate ovary being found 

 also in Guaiacum. [W. C] 



TRICHIA. A genus of myxogastrous 

 Fungi, remarkable from the threads which 

 accompany the spores having a spiral 

 structure. Some controversy exists as to 

 the real nature of these bodies. An atten- 

 tive examination, however, of the threads 

 when branched (which is sometimes the 

 easel shows, we think, that the spiral 

 appearance does not arise from a mere 

 twisting, but from the formation of one or 

 more threads of a spiral form within a tube, 

 with which they afterwards become inti- 

 mately incorporated— the threads passing 

 into the branch exactly like those of true 

 spiral vessels in phamogams.wben the ves- 

 sels are branched. The species are very 

 widely diffused, and occur in various parts 

 of the world. The threads and spores often 

 exhibit bright colours, as deep tawny, scar- 

 let, golden-yeilow, buff, &c. The spores are 

 mostly smooth but sometimes rough, with 

 little points. Most of them occur in Great 

 Britain. [M. J. B.] 



TRICHIDIUM. A hair which bears the 

 spores of such fun gals as Geastrum. 



TRICHILIA. A number of Indian and 

 Australian species were formerly com- 



