pseudospermic 
Ptychodo 
of Labiatae, adj. pseudosper’- 
mic; pseudosper'micus ; pseudos- 
per’mous ; Pseudosporan’ge, Pseu- 
dosporan’gium (+SPORANGIUM), an 
organ producing gemmae or pro- 
pagula, a simulated sporangium 
(Davis); Pseud’ospore (cropa, a 
seed), a gemma or asexual vegeta- 
tive bud ; Pseu’dostele (+STELEz), 
when a petiole assumes the con- 
ditions of a stem, with similar 
arrangement of tissues (Tansley) ; 
Pseudostau’ros (+ STAuROS), a 
broadening of the stauros in some 
Diatoms ; pseudoster’eus t (crepeds, 
solid), partly grown together, as the 
bud-scales of the crown-imperial ; 
Pseudostro’ma (+Srroma), the 
perithecium of certain Fungi; 
Pseudosyn’carp (-++SYNCARP), a col- 
lective fruit; cf SyNcaRP ; Pseu- 
dothal'lus + (+THaLuus), the axis 
of a crowded inflorescence as a 
Glomerule or Umbel; Pseudotri- 
ch’ophore ( + TRICHOPHORE), a vege- 
tative filament of Algae, which 
simulates a trichophore; Pseu- 
dovivip’ary (+ Vivirary), the pro- 
duction of leafy rooting shoots in 
the floral region, side by side with 
the flowers, as in Juncus bufonius, 
Linn. (Potonié) ; Pseu’do-yeast (+ 
YEAST), any yeast which does not 
produce fermentation; Pseudozy’- 
gospore (+ ZyYGosPoRE) = AZYGOS- 
PORE. 
psilo- (Ads), a Greek prefix, usually 
meaning slender, but more cor- 
rectly used for bare or naked, as 
psilostach’ys, which is cited by A. 
Gray as bare-spiked, under the 
form psilostach'yus. 
Psychoph’‘ilae (Fsyche, ¢idéw, I love), 
plants which are fertilized by 
diurnal lepidoptera, possessing 
brightly coloured flowers, with 
honey in the flower-tube. 
Psychrokli’ny (yvxpos, cold, klyw, I 
incline), Voechting’s term for the 
behaviour of growing parts under 
the influence of low temperatures ; 
psychromet’ric (ué7pov, a measure), 
applied by Pfeffer to the hygro- 
215 
psydomorphyt’us 
Pteridograph’ia (mrepls, mrepldos, 
metric movements of plants (Voech- 
ting). 
PSEUDOMORPHY- 
TUS. 
Pteram’pelid (mrépis, a fern, dumedos, 
a vine), any climbing Fern (J. 
Smith). 
ptera’‘tus (repov, a wing), winged ; 
Pterid’‘ies = SaMARA. 
a 
fern, ypagh, a writing), a treatise 
on Ferns, or the science of Ferns ; 
shortened by J. Smith to Pteri- 
graph’ia ; Pterig’raphist, and Pteri- 
graph’ilist (dryéw, I love), a writer 
on Ferns; pter‘idoid (eidos, resem- 
blance), used by E. Newman for 
Fern-like, as ~ Ac’rogens; Pter’ido- 
phyte (¢vrov, a plant), a Fern, or 
closely allied plant. 
Pterid’ium, 
pterig’ynus (rrepov, a wing, yur7, a 
p g. 
woman), wing-seeded ; pterocar’- 
pous, -pus (xapros, fruit), wing- 
fruited; pterocau’lous, -/2s (kavAds, 
astem), wing-stemmed; Ptero’dium, 
= Samara ; pterogo’nus (ywrla, an 
angle) ; pter’oid, pteroi'deus (eldos, 
resemblance), (1) having an eleva- 
tion of surface assuming a wing-like 
appearance ; (2) J. Smith uses 
“pteroid ” for Fern-like ; pterop’o- 
dous (ots, modds, a foot), wing- 
footed, the petiole being marginally 
winged ; pterosper’mous, -mus 
(oméppa, a seed), with the seeds 
winged ; pteryg’ynus (yw7, a 
woman), wing-seeded. 
Pteryg’ium (mreptyiov, a little wing), 
a wing. 
pteryg’opous, -pus (rrépvé, a wing, 
mots, modes, a foot), having the 
peduncle winged ; pterygosperm’- 
ous, -mus (orépua, a seed), = ptero- 
spermous. 
Pto’maine (7rGua, calamity, corpse), 
used of any alkaloid due to the 
activity of pathogenous bacteria. 
Pty'alin (rrvadov, saliva), a ferment 
contained in saliva which trans- 
forms starch into a sugar capable 
of fermenting. 
Pty’chode, Ptycho'des (rrvé, mruxds, 
a fold), the primordial utricle ; 
