Phytogenesis 
Pilidium 
I congeal), the gelatine of Algae ; 
Phytogen’esis (yéveo.s, beginning), 
the origin and development of the 
plant; Phytog’eny, means the same 
as the last; Phytogeog’raphy, 
Phytogeograph'ia (y%, the earth, 
pow, I write), geographic botany, 
the science of plant distribution ; 
Phytogno’sis (yvdo.s, knowledge), 
botany, phytology ; Phytog’raphist 
(ypagn, a writing), a describing 
botanist ; Phytog’raphy, the de- 
scription and illustration of plants, 
descriptive and systematic or taxi- 
nomic botany; phy’toid (eldos, like- 
ness), plant-like ; Phy’tolite (Al@os, 
a stone); Phy’tolith, a plant in the 
fossil condition ; Phytolithol’ogy, 
(Adyos, discourse), the study of 
fossil-plants, palaeobotany; Phy- 
tol’ogist, a botanist; Phytol’ogy, 
Phytolo'gia, botany, the study of 
plants; Phytol’ysis (Xvows, a loos- 
ing), an error (?) for PHoToLysis ; 
phytomastig’opod, see MASTIGOPOD; 
Phy’tomer, pl. Phytom’era (épos, 
a part), the unit of a plant, an 
internode with its leaves, an 
emendation of Phy’ton, applied by 
Gaudichaud to a plant-unit, out 
of a succession of which plants are 
built up; Phyton’omy, Phytonom’ia 
(véuos, law), botanic physiology ; 
Phytonym’ia (dvoua, a name), plant 
organography ; Phytoplank’ton 
(+ PLanxTon), floating pelagic 
plant organisms; Phytopathol/ogy 
(radoroyxds, relating to diseases), 
vegetable pathology, the science 
of plant-diseases ; Phytopol’itus + 
(roAirns, a citizen), a plant which 
is or seems to be parasitic ; Phyto- 
ptocecid'ia (xjxs, a gall), galls 
caused by Fungi (Loew); Phyto- 
stat‘ics (ordois, a standing), the 
various causes which tend to pro- 
duce equilibrium in. the energies 
of « plant; Phytotero’sia (7epéw, 
I pierce), Desvaux’s term for 
plant pathology ; Phytoteratol’ogy 
(+ Teratotocy), the study of 
monstrous growths in plants ; 
Phytot’omy (roui, a cutting), plant 
196 
anatomy, or histology; Phyto- 
troph’ia (roy, nourishment), 
plant culture; Phytozo/ld ({dov, 
an animal, eldos, likeness) = ANTHE- 
ROZOID; Phytozo’a, pl. of Phyto- 
zo’on, antherozoids, mobile fertiliz- 
ing bodies formed in antheridia. 
pic’eus (Lat.), pitchy black. 
Pic’ro-er’ythrin (7ixpos, 
bitter, + 
ERyTuRin), a substance found in 
Lichens ; Picrotox'in (roéuxdv, 
poison), a crystalline narcotic 
bitter ingredient in the berries of 
Cocculus indicus, the medieval 
and trade name of Anamirta 
pamculata, Coleb.; adj. picro- 
tox’ic. 
pic’tus (Lat., painted), adorned with 
colour, as though painted. 
Pie'tra funga’ia (Ital.), ‘‘Mushroom- 
stone,” the sclerotium of Poly- 
porus tuberaster, Fr. 
pila‘ris ¢ (Lat., from pilus, a hair), 
composed of small hairs, pilose. 
pileate, pilea’tus (Lat., wearing the 
pileus), having the form of a cap 
or Pingus; pi'leiform, pileiform'is 
(forma, shape), pileus shaped, 
Pileola, Pile'olus (pileolum, a little 
cap), (1) a small cap or cap-like 
body; defined by Henslow as a 
primordial leaf like an extin- 
guisher, which encloses the bud; 
(2) the diminutive of Pitzus; (3) 
“the receptacle of certain Fun- 
gals” (Lindley). 
Pileorhi’za (7lAcos, pileus, a cap, plfa, 
a root), the root-cap, a hood at 
the extremity of the root ; Pi’leus, 
(1) a convex expansion terminating 
the stipe of Agarics, and bearing 
the hymenium, now extended to all 
sporophores in which the hyme- 
nium faces the ground, the Car; 
(2) used by R. T. Lowe to express 
the habit of Convolvulus Caput-Me- 
dusae, Lowe. 
Pi'li, pl. of Pi’lus (Lat. a hair), hairs. 
Pilid‘ium (mididtov, a night-cap), an 
orbicular hemispherical shield in 
Lichens, the outside changing into 
a powdery substance, as in Cali- 
cium. 
