364 GLOSSARY 



Symbiont (Gr. sim, with, bios, lifn), one of two dissimilar organisms Jiving 



together. 

 Symbiosis, Symbiotic, a living together of dissimilar organisms, with 



mutual heuefit, also styled commc>nsalism, consortism, individualism, 



and mutualism. 

 Sympiiicaupous, Symphycarpous (Gr. sumjjhuo, to grow together, carpos, 



fruit), with confluent apotheoia. 

 SYNGO^'lMIA (Gr. sun, with), gonimia united in clumps. 



Tartarkous, resembling tartar, having a more or loss rough crumbling 



surface, or thickish, and almost smooth. 

 Terebratk (Lat. tcrcbra, a borer), with scattered perforations. 

 Terminal (Lat. icrminarc, to limit), on the end of a stalk or branch. 

 Terricolous (Lat. terra, the earth, colo, to inhabit), living on soil. 

 Tessellate (Lat. tcssclla, a small square piece of stone), resembling a 



tessellated pavement. 

 Testaceous (Lat. testa, a brick or tile), brick-red. 

 Thalamium (Gr. thalamos, a bed-chamber), layer of tissue in the apo- 



thecium, consisting of paraphyses and periphyses. 

 Thalline margin, an apothecial margin formed of and usually coloured 



like the thallus, cf. amphithecium. 

 Thalloid exciple, thalloid margin of the apothecium. 

 Thallus (Gr. thallos, a sprout), vegetative part of the lichen-plant. 

 Theca (Gr. tJieke, a case), an enlarged cell containing spores, cf. ascus. 

 Theciferous (Gr. theke, a case, Lat. fero, to carry), bearing the asci. 

 TiiECiUM (Gr. theke, a case), the layer of tissue in the apothecium consisting 



of asci and paraphyses, cf. hymenium. 

 Thelotremoid, having tubercular apothecia like those of the genus 



Thelotrcma. 

 Thyrsoid (Lat. thyrsus, the bacchic staS, Gr. eidos, like), with crowded, 



dichotomous branching. 

 ToMENTOSE (Lat. tomentum, a stuffing for cushions), densely covered with 



down-like hairs. 

 TORULOSE (Lat. torus, muscle), cylindric, with swollen portions at 



successive intervals. 

 Trabeculose (Lat. trabecula, a little beam), applied to reticulating 



fibrils. 

 Trichotomously (Gr. triche, in a three-fold manner, tame, a cutting), 



branching in a three- fold manner. 

 Trivial (Lat. trivialis, common), the specific name. 

 Truncate (Lat.), ending abruptly, as if cut oS. 

 Tubercle (Lat. tuber, a tumor), a small excrescence or wart — Tubercu- 



LATE, TUBERCULOSE. 



TuBULiFORM (Lat. tubulus, a small pipe), applied to a thallus of round 



pipe-like filaments. 

 Tumid (Lat.), inflated, swollen. 



TuNiCATED (Lat. tunica, a garment), having a coat or covering. 

 Turbinate (Lat. turbo, a whipping-top), shaped like a top. 

 Turgid (Lat. turgidus, inflated), swollen. 



Umber, Umbrine (Lat.), the colour of umber, a dull-browTi. 



Umbilicate (Lat. iimbilicus, the navel), navel-like, depressed in the 



centre. 

 Umbilicately', applied to a thallus centrically affixed to the matrix. 

 Umbo, Umbonate (Lat. umbo, any convex elevation), bearing an umbo in 



the centre. 

 Undulate (Lat. unda, a wave), with a wavy margin. 

 Uniseriate (Lat. ttnus, one, series, a succession), in one row. 

 L'i'RCEOLATE (Ijat. UTceus, a pitcher), pitcher-like, hollow and contracted 



at the mouth. 



