INTRODUCTION TO BOTANY. 
39 
Fibre, Fibra. A collection of vessels and tubular cells 
fastened together, so that they can be detached from the 
surrounding cellular texture in long threads; their princi- 
pal use is to direct the flow of the juices. PL 1. fig. 5. e. 
Nerves, Nervi. Fibres visible on the external surface of 
the plant or its leaves. 
Fleshy parts, Parenchyma . A pulpy substance, formed 
of soft cellular texture ; common in leaves and fruits. 
Cuticle, Skin, Epiderma , Epidermis , Cuticula . The fine 
membrane, usually transparent, which covers the whole 
surface of the plant. 
Vasa exhalantia . The lines separating the fleshy part 
from which the cuticle has been removed into hexagonal 
spaces. 
Articulation, Articulation Junctura . A part in which, 
at a determinate period, the plant may be separated into 
two or more pieces, without much violence. 
Joint, Articulus . The interval between two articulations. 
Cicatrix, Cicatricula. The mark remaining at the arti- 
culation after a joint has been detached. 
Knot, Nodus , Geniculum. The swelling of the texture 
of the plant, forming a protuberant ring. Grasses. Pinks. 
Internodium . The space between two knots. 
Nodosity, Nodositas. A concretion formed by vegeta- 
tion, and occasioning a swelling, or tumour, as in the 
leaves of what are called Junci articulati. 
Pores, Pori. Very small openings, in the membranous 
texture, visible by the microscope. 
Insensible pores, Pori inconspicui, Pori cellulares. Pores 
supposed to exist, although invisible, and to be the organs 
of insensible perspiration. 
Cortical pores, Pori corticales , Stomatia, Glandulce corti- 
cales , Fori elongati , Pori magni , Pori evaporatorii , Pori 
epider midis, Glandulce miliar es, Glandulce epidermoidales. 
Oval pores, very visible with a lens, on the surface of the 
fleshy parts which are above ground : appear to be the 
organs of exhalation, and perhaps of the inhalation of 
watery vapour, but do not admit the passage of coloured 
fluids. 
Spongiolce. Organs like a sponge, capable of taking up 
coloured fluids, although no pores can be observed with 
the highest magnifying powers. Lemna, Pandanus, Stig- 
mata of flowers. 
Glands, Glandulce , in composition — aden , — adenos . 
Organs for the purpose of secreting peculiar liquids, and 
