GLOSSARY | 725 
Losr.—A division of a leaf or other flattened organ which is larger than a tooth but 
which is not a leaflet. 
Loc’uLAr.—Having a cavity or cavities. 
Locutici’pAL.—Applied to the deshiscence of a capsule when it splits open along 
the dorsal suture. 
Loc’u.us.—A cell or cavity of an anther, ovary, or fruit. 
Lo’ment.—A modified, jointed or multilocular legume that breaks open wane: 
versely into segments when mature. 
Lvu’ciw.— Clear. 
Lu’men.—The cell cavity. The open space bounded by the walls of a ua, 
Lu’ntrorM.—Half-moon or crescent shaped. 
Lu’R1w.—Dingy-brown. 
Lutes’cenT.—Yellowish. 
Ly’rate.—Applied to a pinnatifid leaf, as that of the Turnip, in which the terminal 
lobe is the largest and the rest decreasing in size toward the base. 
Lysic’gNous.—Applied to the formation of a type of intercellular-air-space which 
originates through the breaking down of cell walls common to a group of cells; 
also applied to secretion reservoirs which are formed by the complete breaking 
down of contiguous secretory cells which leave their products in the cavity 
formed. 
Macro.—A prefix of Greek origin meaning large. 
MaAcrosporan’GiumM.—A _ spore ‘case containing one or more macrospores. (The 
nucellus in Spermatophytes. ) 
Mac’rospores.—The larger of the two different kinds of spores produced by some 
of the higher Pteridophytes and the Spermatophytes. (The embryo-sac in 
Spermatophytes.) 
Macrospo’ropHy_i..—The leaf bearing the macrosporangium. (The carpel in 
Spermatophytes.) 
Mac’uLATE.—Spotted. 
Ma/MILLATE.—Bearing teat-like protuberances. 
Marces’cENT.—Withering but not falling, dropping off. 
Marine’.—Applied to plants which grow in the sea or ocean. 
Meput’LA.—Pith. 
Mep’uLLARY.—Pertaining to the pith. 
Mep’utLAry Rays.—Vertical, radial plates of parenchyma connecting the cortex 
with the pith or a portion of the xylem with a portion of the phloem, 
Mep’uLLARY SHEATH.—The inner ring of xylem abutting on the pith. 
Mecaso’rus.—The ovule. 
MeGAsPoRAN’GIUM.—See macrosporangium, 
Mec’ASPORE.—See macrospore. 
MEGASPO’ROPHYLL.—The carpel of seed plants. A leaf bearing one or more 
megasporangia. 
Maero’sts.—The reduction divisions during the maturation of the gametes, in which 
the members of each chromosome pair separate, and the chromosome number 
in the resulting daughter cells is reduced to half the somatic number. erie 
Mem’sRANE Crys’TALS.—Crystals enclosed within a membrane developed within 
the cell. ; 
Mem’pRANOUs.—Thin, soft and flexile. 
