GLOSSARY. XXi 
PERMANENT, the same as persistent. 
PERPENDICULAR, being a right angles with some other body. 
PERPUSILLUS, very small. 
PERSISTENT, remaining when other paits have fallen off, as the calyx of 
Labiate plants remaining after the corolla is fallen off; also 
the leaves of evergreen plants are called persistent, 
PERSONATE (persona, a mask,) ringent, monopetalous corollas, the limb of 
which is unequally divided, the upper division or lip being 
arched, the lower prominent, and pressed against it, so that 
when compressed on its sides it opens, and has some resem- 
blance to the mouth of a gaping animal. 
PETAL (aeraAoy, a leaf,) the envelope of the flower between the calyx and 
stamens is the corolla, and its divisions are called petals. 
PuTAL-LIKE (petaloideus), having the colour and texture of petals, as the 
stigma of Iris, and the bractez of many plants. 
PETIOLE (petiolus, the stalk of fruit,) used iv botany for the leaf stalk, and 
is that part which connects the blade of the leaf with the 
stem. 
PETIOLULES, stalklets, the leaf stalks of the leaflets of compound leaves. 
PHYLLUM (Quaroy, leaf,) used by some botanists instead of sepalum. 
PrLEvs, the cap or top of an Agaricus, and resembles an umbrella in form. 
PiLiFERUS, hair pointed, terminating in a fine weak point, as the leaves of 
many mosses. 
Pizosvs, hairy, covered with short weak hairs, 
PINNATE (pinnatus), a compound leaf, having simple leaflets arranged on 
each side a common petiole. 
PinNATE with an odd one (impari pinnatus,) which see. 
PINNATIFID, cut almost to the axis into lateral segments. 
Pistix (pistillum), the female system of the flower, which always occupies 
é its centre, and consequently around it all other organs are 
arranged. It is divided into three parts, the ovary, the style, 
and the stigma. 
PITCHER-SHAPED (urceolatus), bell-shaped, with a contracted mouth and 
erect limb. 
Piru, the central column of cellular substance in Exogenous plants, which 
arises at the point of separation between the root and the 
stem, (giving out lateral rays in its course, called medullary 
rays, which are in direct communication with the bark,) and 
terminates in the leaf buds. 
Pirrep (scrobiculatus), anything having small shallow depressions or ex- 
cayvations. ) 
PLAcENTA, any part of the ovary to which the ovules are attached. 
PLaiteD (plicata), folded lengthwise similar to the plaits of a fan. 
PLaNe, a level or flat surface. 
Prumosus. See feathery. 
PLUMULE, a minute point at the base of the cotyledons of seeds, which 
expands by germination into the stem and leaves. 
PouisHED (Jevigatus), having a smooth polished surface. 
PotLEeN (fine flour), the pulverulent substance which fills the cells of the 
