Thyrse 
tomentoug 
Thyrse, Thyr’sus (Lat., the Bacchic 
staff), a mixed inflorescence, a 
contracted or ovate panicle, the 
main axis indeterminate, but the 
secondary and ultimate axes cy- 
mose ; thyrsif‘erous, -rus (fero, I 
bear), bearing a thyrse; thyrsiflor’us 
(jlos, floris, a flower), the flowers 
in a thyrse; thyr’siform (forma, 
shape), shaped like a thyrse ; 
thyr’soid (cldos, resemblance), like 
a thyrsus ; Thyr’sula, the little 
cyme which is borne by most 
Labiates in the axil of the leaves. 
Tige, pr. teej (Fr., tige), stem ; 
Tig’el, = Tigelle’, Tigel’'la, Tigel’- 
lum, Tigel’lus, a miniature or 
initial stem, used for (a) caulicle 
or hypocotyl, (6) plumule ; tigella’- 
tus, ¢ (1) having a short stalk, as 
the plumule of the Bean ; (2) when 
the stalk is well marked; Tigel’- 
lula + a short filament or stalk 
observed inthe Truffle; tigellula’ris, 
vascular. 
Tig’line, the acrid principle in the 
seeds of Croton Tiglium, Linn. 
Tiller, a sucker or branch from the 
bottom of the stem; til’lering, 
throwing out stems from the base 
of the stem ; Til’low (Crozier), = 
TILLER. 
Tim’ber-line, the upper limit of ar- 
boreal vegetation on the mountains. 
tinctor’ious, -rius, tinctor’ial (Lat., 
pertaining to dyeing), used for dye- 
ing, imprinting colour. 
Tin'der - fung’us, Polyporus fomen- 
tarius, Fr. 
Tinoleu’cite (relyw, I extend, + 
Levcire), Van Tieghem’s term for 
directing spheres, the centrosomes. 
Tip, used by Grew for ANTHER. 
Tis’sue, the texture or material 
formed by the union of cells of 
similar origin and character, and 
mutually dependent; tissues united 
form systems, these again form 
organs; ~ Cord, central cord 
(Crozier); aq’ueous ~ , a form of 
hypoderma, consisting of thin- 
walled parenchyma wanting chloro- 
plastids, but containing much 
watery sap ; Conjun’ctive ~, ground 
tissue arising from the plerome or 
young stele; cutic’ularized ~ , modi- 
fied cell-walls, as epidermis and 
periderm ; embryon’ic ~, = Mert- 
STEM ; ex’tra-ste’lar ~, see GROUND 
TIssuE; false ~ = SPURIOUS ~ ; 
glan’dular ~ , composed of secreting 
cells or glands; Ground ~, funda- 
mental tissue, neither vascular por 
epidermal, either within or without 
the stele; heterog’enous ~, con- 
sisting of various kinds of cells ; 
homoge’neous ~, when the cells 
are uniform ; intra ste’lar ~ = Con- 
JUNCTIVE-TISSUE; lim‘itary ~, 
epidermal tissue; parenchy’mat- 
ous ~, (a) thin-walled, as pith 
cells ; (6) thick-walled, as collen- 
chyma; per’manent ~ , adult tissue ; 
primary ~ first formed tissue ; 
prosenchy’matous ~, woody tissue ; 
sclerenchy’matous ~, thickened or 
hardened, as fibres or sclereids ; 
sec’ondary ~, resulting from 
growth from continuous meriste- 
matic activity; sieve ~, of long 
articulated tubes, communicating 
by means of their sieve-plates in 
their walls; spu’rious ~, an 
approach to a tissue, by hyphas 
massing into a felt, or their apices 
forming a collective apical growing 
point ; tegumen’tary ~, the ex- 
ternal epidermal layer; tra’cheal 
~, composed of tracheids, especially 
adapted for the conveyance of 
liquids; vas’cular ~, the com- 
ponents of the vascular system of 
a plant. 
Tme’ma (rpjua, section), a cell 
ruptured in setting free a Moss- 
gemma (Correns). 
tofa’ceus (Lat., formed of tufa), (1) 
tufa-coloured, buffy drab; (2) 
gritty. 
Toise (Fr., a fathom), a measure for- 
merly used in France, 6'395 feet, 
1:9492 metre,6 French feet. 
Tolu’, a resinous exudation from 
Myroxylon toluiferum, H. B. K. 
to’mentose, tomento’sus, tomen'tous, 
densely pubescent with matted 
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