Symbiont (Gr. sun, with, hios, life), one of two dissimilar organisms living
together.
Symbiosis, Symbiotic, a living to g e th e r of dis sim ilar organisms, w ith
m u tu a l benefit, also styled commensalism, consortism, individualism,
a n d m u tu a lism .
Symphicabpous, Symphycakpous (Gr. sumphuo, to grow together, carpos,
fruit), with confluent apothecia.
Syngonimia (Gr. sun, with), gonimia u n ite d in clumps.
Tabtarbous, resembling ta r ta r , hav in g a more or less rough c rum b lin g
surface, or th ic k ish , a n d a lm o st smooth.
Terebrate (Lat. terebra, a borer), with scattered perforations.
Terminal (Lat. tcrminare, to limit), on the end of a stalk or branch.
Terbicolods (Lat. terra, the earth, colo, to inhabit), living on soil.
Tbssellate (Lat. tessella, a small square piece of stone), resembling a
tessellated pavement.
Testaceous (Lat. testa, a brick or tile), hriok-red.
Thalamium (Gr. thalamos, a bed-chamber), layer of tissue in the apo-
theoium, consisting of paraphyses and periphyses.
Thalline margin, a n a p o th e cia l m a rg in formed of an d u su a lly coloured
like th e th a llu s , cf. am p h ith e cium .
Thalloid e x c ip l e , thalloid margin of the apothecium.
Thallus (Gr. thallos, a sprout), vegetative part of the liohen-plant.
Thbca (Gr. theke, a case), an enlarged cell containing spores, cf. ascus.
Thbciperous (Gr. theke, a case, Lat. fero, to carry), bearing the asci.
Thecium (Gr. theke, a case), the layer of tissue iu the apothecium consisting
of asci and paraphyses, cf. hymenium.
T helotbemoid, hav in g tu b e rc u la r ap othecia like th o se of th e genus
Thelotrema.
Thyrsoid (Lat. thyrsus, the bacchic staff, Gr. eidos, like), with crowded,
dichotomous branching.
Tomentose (Lat. tomentum, a stuffing for cushions), densely covered with
down-like hairs.
Torulose (Lat. toi-us, muscle), cylindric, with swollen portions at
successive intervals.
T rabbculosb (Lat. trabecula, a little beam), applied to reticulating
fibrils.
Trichotomodsly (Gr. triche, in a three-fold manner, tome, a cutting),
branching in a three-fold manner.
T rivial (Lat. trivialis, common), the specific name.
Truncate (Lat.), end in g ab ru p tly , as if out off.
T ubercle (Lat. iuber, a tumor), a small excrescence or wart—Tubercu-
LATB, TuBBBCULOSB.
T ubulifobm (Lat. tubulus, a small pipe), applied to a thallus of round
pipe-like filaments.
T umid (L at.), inflated, swollen.
Tunicated (Lat. tunica, a garment), having a coat or covering.
T urbinate (Lat. turbo, a whipping-top), shaped like a top.
T urgid (Lat. turgidus, inflated), swollen.
U mber, U mbbinb (Lat.), the colour of umber, a dull-hrown.
Umbilicate (Lat. umbilicus, the navel), navel-like, depressed in the
centre.
U mbilicately, applied to a th a llu s c en tric ally affixed to th e m a trix .
U mbo, U mbonate (Lat. umbo, any convex elevation), bearing an umbo in
the centre.
Undulate (Lat. unda, a wave), with a wavy margin.
U niseriat e (Lat. unus, one, series, a succession), in one row.
U bcbolatb (Lat. urceus, a pitcher), pitcher-like, hollow and contracted
at the mouth.
Vabiolarioid (Lat. variola, the pustule of small-pox), with powdery or
granular tubercles like the supposed fructification of the old genus
Variolaria—Vabiolosb.
Ventricose (Lat. venter, the belly), swollen or inflated.
V ermicular (Lat. vermiculus, a little worm), worm-shaped.
Verruca (Lat., a wart), the granular wart-like part of the thallus.
Vebbucarioid, fructification similar to that of the genus Verrucaria.
Versicolorous (Lat. verso, to turn often, color, colour), changing colour.
Ve r t ic il (Lat. vertex, a whirl), a whorl, circular arrangement of parts
round an axil—Vebticil la t e .
Vbsiculosb (Lat. vesícula, a bladder), as if composed of small bladders.
ViLLOSB (Lat. villus, a shaggy hair), bearing long hairs.
Vit e l l in e (Lat. vitellus, the yolk of an egg), egg-yellow.
Zeobinb, like the old genus Zeora, in which the apothecium had a double
margin.