Ptenophyllophilus 
(SUPPLEMENT) 
reparative 
deciduous leaves”), a deciduous 
forest formation; ptenophylloph’- 
ilus (g¢i\éw, I love), dwelling in 
deciduous forests; Ptenophyllo- 
phy'ta (¢urdv, a plant), deciduous 
forest plants. 
Ptenophy’tia (rrnvds, winged, purov, 
a plant), intermediate plant for- 
mations (Clements). 
Ptenotha’lium (‘‘ rryvoGadhs, deci- 
duous’’), a deciduous thicket for- 
mation; ptenothaloph’ilus (duréw, 
I love), dwelling in deciduous 
thickets; Ptenothalophy’ta (purdv, 
a plant), deciduous thicket plants 
(Clements). 
Pterido’ma (mrepis, a fern), the body 
or substance of a Fern; pterido- 
phyt‘ic, fern-like; Pter’idosperm 
(orépua, & seed), MacMillan’s term 
for plants with obligatory and 
pteridophytic seeds, and mono- 
morphic embryos, as Lepidos- 
trobus; Pterop’sida (éyis, sight), 
the group of Fuilicales, Gymno- 
sperms, and Angiosperms, with 
ample leaves; phyllosiphonic Vas- 
culares (Jeffrey). 
Pte’rospores, -ae (+Spore), plants 
having winged seeds (Clements). 
Puffs, Sir J. E. Smith’s equivalent 
for Prxipia in Lichens. 
pulley-shaped (p. 216), read, com- 
pressed and usually grooved in its 
circumference. 
Pulsel’‘lum (pulso, I beat), a pos- 
terior flagellum of a zoospore 
(Lankester). 
Pus'tule, (2) used by Sir J. E, Smith 
for VARIOLA. 
Pycno’sis (rixvwo.s, condensation), 
used by Maire to express atrophy 
by becoming dense and thickened. 
Pycnophy tia (¢urev, a plant), ‘‘ closed 
formations” (Clements). 
Pyocy’anase, the enzyme of Bacillus 
pyocyanus; pyogen’ic = PYOGENETIC. 
pyrenocar’pic, relating to a pyreno- 
carp, or perithecium. 
Pyrium (mip, wvpéds, fire), ‘a burn 
succession” (Clements). 
Pyr'rhophyll (zvppds, flame-coloured, 
gtMor, a leaf), the colouring matter 
Z 
353 
contained in the Peridineae(Warm- 
ing). 
Race, adap’tive, or biolog’ical, a RacE 
distinguished by its physiological 
characters, not by its morphology. 
ra’dial (3) = ACTINOMORPHIC ; 
strand, large cells forming with 
the hypodermal strand in the 
stem of Bryophytes, wedge-shaped 
masses of tissue (Tansley) ; Ra’dio- 
sperms (orépya, a seed), certain 
fossil fruits, circular in transverse 
section (Ff. W. Oliver); ef. Puaty- 
SPERMS. 
rad‘ulan, akin to Rubus Radula. 
Ra'miform (+ Form), an extreme 
modification of GrEGIFoORM, usually 
of monophyletic origin (Kuntze). 
ram’uline, applied to leaves on the 
branches of mosses. 
ranuncula’ceous, (1) buttercup yellow 
(Hayne); (2) allied to the genus 
Ranunculus ; ranune’uloid, re- 
sembling that genus. 
ra’phal, relating to the RAPHE. 
Raphidoplank’ton (+ PLANKTON), 
floating organism of a needle- or 
spindle-shape (Forel). 
Ra‘roform (rarus, infrequent, + 
Form), a new form with imper- 
fect connections with its surround- 
ings (Kuntze). 
Reac’tion Time, the period needed for 
an organ to show response to stimu- 
lus (Macdougal). 
recip’rocal Autoph’agy, sexuality in 
primitive forms of Algae; the 
gametes acting mutually (Dan- 
geard). 
Re’flex Cent/rum, a term suggested by 
Czapek for a potential link between 
the organ of perception and that 
of response. 
Re’gions, aust’ral ~, southern parts 
of the globe; bor’eal ~, northern 
portions ; tropical~, within the 
tropics. 
regressive, in hybrids, applied to 
those characters which become 
more cr less dormant; ¢f. pomt- 
NANT. 
reparative (reparo, I repair) Steles, 
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