margined 
Median 
a margin of distinct character ; 
mar’gined, marginate; marginici’- 
dal (caedo, I cut), dehiscent by the 
disjunction of the united margins 
of the carpels, a form of septicidal 
dehiscence ; Mar’go thallo’des, the 
rim of the shield of a Lichen formed 
by the thallus. 
marine’, mari’nus (Lat., pertaining to 
the sea), growing within the influ- 
ence of the sea, or immersed in its 
waters. 
marit‘imus (Lat., marine), belonging 
to the sea, or confined to the sea- 
coast. 
Mark’ings, used of various forms of 
thickening on the cell-wall, as 
annular, reticulated, spiral, etc. 
marmora’tus (Lat., marbled), having 
veins of colour, as some marbles. 
Mar’row, used by Blair for the pith. 
marsu’pial (yapovmiv, a pouch), 
geocalycal or pouch-fruited, used 
of certain Hepaticae. 
mas, mas‘culus, masculi’‘nus (Lat.), 
male; staminate, or with corre- 
sponding structures. 
masked, personate. 
Mass, usually written Mast. 
Mas’sa (Lat., a lump), the mass or 
substance of a body ; ~ semina’lis, 
the flesh of some Fungi (Lindley) ; 
~ sporoph’ora; ~ thecig’era, the 
sporangia of some Fungi (Lindley) ; 
Mas’ses, collections of anything in 
unusual quantity, as pollen-masses. 
Mas’sula (Lat., a little lump), (1) 
the hardened frothy mucilage 
enclosing a group of microspores 
in Heterosporous Filicineae ; (2) in 
Phanerogams, a group of cohering 
pollen- grains produced by one 
primary mother-cell, as in Gr- 
chideae ; also styled Pollen-mass. 
Mast, the fruit of such trees as beech, 
and other Cupuliferae. 
mast/igopod (udort, a whip; sods, 
moods, a foot), a stage in the 
development of Myxogastres, the 
contents of each spore escape as a 
zoogonidium enclosing a nucleus 
and contractile vesicle, with a 
single cilium, 
453 
Mas’tic (uaorlyn, gum), a resinous 
exudation from Pistacia Lentiscus, 
Linn. 
mas’toid (uacrds, a breast; eldos, like), 
nipple-like. 
Math, an old term for crop, as after- 
math =second crop. 
Ma’trix (Lat. the womb), the body on 
which a Fungus or Lichen grows, 
~ Pol'linis, the cell in which 
pollen-grains are developed. 
Mattul'la or Mat'tula (matta, a mat), 
the fibrous material surrounding 
the petioles of palms. 
Maturation, Matura’tio (Lat.), ripen- 
ing. 
matures’cent (matwrescens, becom- 
ing ripe), approaching maturity 
(Crozier). 
matuti’nal, matutina‘lis, matuti’nus 
(Lat.), poate to the morning ; 
plants flowering early, as Ipomoea 
purpurea, Roth. 
meal’y, farinaceous. 
mean'driform { (ualavdpos, a winding 
river, forma, shape), having a 
winding direction, as the anther- 
cells of Cucurbitaceae. 
Mea’tus (Lat., a passing) intercel’lu- 
Jaris, an intercellular passage; ~ 
pneumat’icus, an air-passage. 
Mechanomorph’osis (uyyav7j, contriv- 
ance, péppwots, shaping), w word 
coined by Sachs to express me- 
chanical changes in structure pro- 
duced in the larger groups by 
similar external causes, as leaf-like 
organs inAlgae and Phanerogams. 
Me’conine (ujxwv, a poppy), an alka- 
loid contained in opium; Meco’nium, 
botanically, the juice of Papaver 
somniferum, Linn. 
me’dial, me’dian, media’nus (Lat., in 
the middle), belonging to the 
middle ; Me’dian Line, the central 
line of a bilateral organ, as the mid- 
rib of a symmetric leaf; ~ Plane, 
when used of a flower, in the plane 
of bract and axis; ~ Wall, in 
Archegoniates, the wall in a plane 
at right angles to the basal wall 
dividing the proémbryo into lateral 
halves, 
