GLOSSARY. XV 
INDUSIUM, or involucrum, that portion of the epidermis, pushed up by the 
thee of Ferns, and afterwards shrinks up or splits into 
filaments. 
Incrvunis, unarmed, destitute of any kind of spines or prickles, 
InrErior, the calyx being distinct from the ovary is said to be inferior, and 
the ovary superior. 
InFfiatus, bladdery, thin, membranous, somewhat transparent, equally 
swelling, as if inflated with air. 
INFLEXED, suddenly bent inwards. 
INFLORESCENCE, a term used to express the arrangement of flowers upon a 
branch or stem. é 
INFUNDIBULIs. See funnel-shaped. 
INFUNDIBULIFORMIS. See funnel-shaped. 
INsERTION, the manner in which one part is inserted into or adheres to 
another. 
INNATUS, innate, adhering to the apex. 
INTEGER, entire. 
INTEGERRIMUS, quite entire, perfectly free from any division. 
INTERNODE, the space between two nodes or joints. 
INTERRUPTUS, interrupted, when the symmetrical arrangement of any part 
is broken; a spike is interrupted when some part of it is 
without flowers, a leaf interruptedly pinnated when some of 
the pinne are much smaller than the others, or are wanting. 
INTERRUPTEDLY PINNATE, when some of the leaflets are smaller than 
another in a pinnate leaf. 
Intricatus. See entangled. 
Intracurvus, suddenly bent inwards. 
Inrrorsts, turned inwards, 
INVERTED (inversus), having the apex of one thing in an opposite direc- 
tion to that of another. 
INVOLUCELLUM, or partial inyolucre, the bracts or scales surrounding the 
small umbellules of umbellate plants. 
InyoLucreE (involvo, to wrap in,) whorls of bracts, which surround several 
flowers, and when they surround the general umbel of um- 
bellate plants are called the universal umbel. 
InvoLute, when the edges are rolled inwards, spirally on each side, as the 
leaf of the apple. 
IRREGULAR (i7regularis), any part having its symmetry destroyed by some 
inequality, as the corolla of the violet, sage, pea, &c. 
J. 
JoixtED (articulatus), readily separating at the joints, as the rods of 
Ornithopus, or the appearance of being jointed, as the leaves 
of some of the Juncuses. 
Juca (jugum, a yoke,) the opposite leaflets of pinnate leaves is a juga, 
when a leaf has only one pair, unijugum; two pairs, bijugums 
&e. 
JUNGERMANNIACES, a tribe of moss-like plants. 
