Petrium 
(SUPPLEMENT) 
Phycochrysin 
make), formerly applied to all 
fossils, now restricted to those 
completely penetrated by silicic 
acid or calcium carbonate, and so 
preserved in a solid form. 
Pet’rium, (mérpos, a rock), a rock 
formation; petroph’ilus (¢iAiéw, I 
love), rock dwelling ; Petrophy’ta 
(gurov, w plant), rock plants (Cle- 
ments); Petroch’thium, pl. -ia 
(8x8, a bank), a rock bank forma- 
tion; petrochthoph’ilus (giAéw, I 
love), living on rock banks; 
Petrochthophy’ta (gdurdv, a plant), 
rock bank plants (Clements). 
Petro’dium (erpwdys, stony), a 
boulder field or stone formation ; 
petrodoph’ilus (¢:Afw, I love) dwell- 
ing in boulder fields; Petrodo- 
phy’ta (gurov, a plant), boulder 
field plants (Clements). 
phaenobio’tic (ios, life), Kuntze’s 
term for that geologic period 
when plants made their appear- 
ance as evidenced by their fossil 
rem ins. 
Phae’ophore (dopéw, I carry), 
Schmitz’s term for chlorophyll 
ranule when dark brown, as in 
Phachpliguest ; Phae‘ophyte (guror, 
a plant), the olive-green seaweeds, 
or Phaeophyceae (Wettstein). 
Phanerog’amy, the condition of PHa- 
NEROGAMS; phanerop’orous ( + 
Port) employed to denote the 
position of stomata on the epi- 
dermal layer of the plant (Hagen) 
cf. CRYPTOPOROUS, 
Pharmacogno’sy (¢dpuaxoy, a drug, 
yao, knowledge), the know- 
ledge of the distinctive features 
of vegetable drugs (E. M. Holmes). 
Phell'‘ium (#eAdevs, stony soil) a *‘ rock 
field formation” ; phelloph’ilus 
(piAéw, I love), dwelling in stony 
tields ; Phellophy’ta (gurov, a plant), 
plantsgrowing amongst loosestones 
(Clements), 
phe’nicine, phenic’eous (Heinig) = 
PHOENICEOUS. 
Phleume’tum, a plant - association 
consisting of Phleum pratense, etc. 
(Ganong). 
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Phioém-parench’yma, cf. BAST-PAREN- 
CHYMA. 
Phiyktioplank’ton (@duxz7ls, a blis- 
ter, + PLanxron), Forel’s term for 
organisms supported by hydro- 
static meang, 
Pho’bism, Massart’s term for repul- 
sion of plants. 
pho'tic, influenced by, or adapted to, 
the action of light ; Pho’toblast 
(BAacrds, a bud), used of a shoot 
developed above the soil, and 
adapted to live in light and air 
(Kirchner) ; Photokine’sis (+ K1nz- 
SIs), movement induced by light; 
Photonas'ty (vacrds, pressed close), 
one-sided growth in length of an 
organ, due to the unrestricted 
action of light (De Vries); adj. 
photonas’tic ; Photop’athy (dos, 
suffering) = PHoTotaxis ; photo- 
ph’ilous (¢:Aéw, I love), sun-lovin 
plants; Photoph’obism (¢o08¢w, 
fear), avoidance of light; photo- 
ph’ygous (¢vyn, flight), applied to 
shade plants; Photoplagiot’‘ropy 
(wAd-yos, placed sideways, rpori, 
a turning), a tendency to arrange- 
ment obliquely towards incident 
light (Goebel) ; Photot/onous, (2) 
proposed by Nagel for botanic use 
instead of PHOTOKINESIS, which is 
considered more appropriate for 
zoologic use. 
Phrag’matospore (omopd, a seed), a 
multicellular spore, capable of ger- 
minating from more than one point 
(A. Braun). 
Phre’tium (g¢pyriov, a water tank), 
a tank formation; phretoph’ilus 
(¢Aéw, I love), dwelling in tanks ; 
Phretophy’ta (gurdv, a plant), 
tank plants (Clements). 
Phycobry’ophytes (+ BryYoPHYTES), 
Got2’s term for Characeae. 
phycochroma’‘ceous (xpéua, colour 
+ ackous), applied to gonidia 
which are not green (chlorophyl- 
laceous) ; Phy’cochrome, the bluish- 
green colouring matter of Algae 
(Bofhet) ; Phycophy’ta (gurdv, a 
plant), Trevisan’s name for Chara- 
ceae ; Phycochry’sin (xpvcos, gold), 
