BOTANIC MATERIA MEDICA, 461 
a perfume, a sweet odor, an imponderable 
vapor). Any substance that affects the or- 
gans of smell agreeably; an invisible agent; 
scent; the breath of flowers. 
Pericarp—per’-i-karp; also Pericarpium (Gr. 
pertkarpion, the covering of a seed; from per?, 
around sarfos, fruit), The part of the fruit 
immediately investing the seed. 
Periderm—per’-i--derm (Gr. peri, around or 
about, and derma, theskin). The outer layer 
of the bark of the tree or plant. 
Perisperm—per -i-sperm (Gr. peri, around, and 
sperma, a seed), The nutritive matter stored 
within the seed; the inner envelope of the 
seed. 
Persimmon—per’-sim-un (the name is derived 
from the American Indian). A tree, native 
of North America, once used as an astringent 
medicine; the Diospyros Virginiana. 
Persistent—per-sist'-ent (Lat. jer, through, 
and szsto, I stand; Italian, fersistere, perma- 
nent, continuing, remaining). Not falling 
off, remaining, adhering to the axis until the 
part bearing it matures.. 
Phanerogamic—fan’-er-o-gam’-ik, also Phan- 
erogamous (Gr. /haneros, manifest, and 
gamous, marriage). Plants which have their 
organs of reproduction distinctly and visibly 
marked; plants opposed to the Crytogamic. 
Pharmaceutical—far’-ma-su-ti’-kal, also Phar- 
maceutic (Gr. pharmakeia, the using of med- 
icine, from pharmakon, medicine). Relating 
to medicine, the science of pharmacy. 
Pharmaceutist—phar’-ma-su’-tist (Gr. phar- 
makon, a medicine). One who has the knowl- 
