Leucite 
Light-absorption 
‘‘Amidocaproic acid” is a white 
substance, first found in animals, 
afterwards found in plants ; Leu’- 
cite, Van Tieghem’s name for 
Lrvcopuast; he further modifies 
the term by prefixing amylo-, 
chloro-, chromo-, elaio-, oxali-, 
for various modifications ; further- 
more, act/ive ~, or pas’sive or 
reserve’~, according to function ; 
Leu'coplast, Leucoplas’tid (aA\aords 
moulded), A. F. W. Schimper’s 
term for the specialised colourless 
protoplasmic granule; syn. ANa- 
Piast (A. Meyer),and Leucitz (Van 
Tieghem) ; leucophyl’lus (#vA)ov, a 
leaf), white -leaved ; Leu’cophyll- 
grain = LEucoPuast ; Leu’cosomes 
(c@ya, a body), small spherical 
bodies, apparently composed of al- 
buminoids inclosed in the leuco- 
plasts of Commelynaceae (Zimmer- 
mann). 
leviga'tus (Lat.) smooth, slippery ; 
in botanical Latin it is usually 
spelled ‘‘laevigatus.” 
le'vis (Lat.) smooth, in the sense of 
not rough; from the time of 
Linnaeus downward this has been 
spelled botanically as “laevis.” 
Le’vulose (/aevus, on the left side)= 
Fructose or fruit-sugar ; it deflects 
polarised light to the left. 
Lia’na, Lia’ne (Span. liar, to tie), pr. 
léah-na, lé-ahn ; luxuriant woody 
climbers in the tropics with stems 
of anomalous structure; lia’noid 
(eldos, like), having a liana-like 
habit. 
Li’ber (Lat. inner bark), the inner 
bark, which is often fibrous, the 
phloém of the vascular system con- 
taining the bast-tissue; ~ Fi’bres, 
bast-fibres. 
liber (Lat. free), having no cohesion 
with the adjoining parts; libera’tus 
(Lat.), freed. 
liberolig’neous (liber, inner bark, 
lignum, wood), applied to a con- 
joint bundle composed of bast and 
wood elements ; lib’riform (forma, 
shape) Cell, a narrow, thick- 
walled cell of woody tissue re- 
146 
sembling bast, wood-fibre (Crozier); 
~Fi'bres, substitute fibres reduced 
in form (Germ., Ersatzfasern). 
 Li’chen (Necxhv, lichen), a Cryptogam 
which forms a thallus which is 
either shrubby, leafy, crustaceous 
or powdery, generally regarded asa 
symbiosis of hyphal filaments with 
algal gonidia; ~ Algae, the gonidia 
or green bodies in the thallus; ~ 
Fun’gi, the filaments of hyphae, 
which are usually interwoven with 
the gonidia; ~Starch= LICHENIN ; 
Li‘chenin, the peculiar starch-like 
body in Cetraria islandica, Linn., 
and other Lichens; Li’chenism, 
the special symbiosis between alga 
and fungus occurring in Lichens ; 
li’chenoid (eféos, like), irregularly 
lobed, as Lichens; Lichenog’rapher, 
Lichenog’raphist (vpdgw, I write) = 
Lichenologist ; Lichenog’raphy, the 
study of Lichens; adj. licheno- 
graph’ic ; Lichenol’ogist (éyos, dis- 
course), a student or writer on 
Lichens ; Lichnoér’ythrine (épv8pos, 
red), Sorby’s name for the red 
colouring matter of Lichens; Lich- 
noxan'thine (fav@ds, yellow), the 
same observer's term for the yellow 
colouring in Lichens. 
Lid (1) the operculum of moss-capsules 
(Hooker); (2) the distal extremity 
of the ascidium of Nepenthes which 
forms a lid-like appendage to the 
pitcher ; (3) the areas of pollen- 
grains which are detached to per- 
mit the pollen-tubes to pass; ~ 
Cells, the terminal cells of the neck 
of the archegonium which tem- 
porarily close the canal; the stig- 
matic cells. 
Life, the state in which plants can 
grow or perform their functions of 
absorption, assimilation, reproduc- 
tion, etc. ; ~ Cy’cle, the course of 
development from any given stage 
to the same again, as from the seed 
to the seed once more. 
Ligamen’tum + (Lat., a band or band- 
age) = RAPHE. 
Light-absor’ption, the ratio of the 
whole of daylight to that of the 
