Phioéoterma, 
Phragmitetum 
exogens from the wood (xylem) 
by the cambium; ~ TI'slands, 
groups of bast-strands surrounded 
by xylem (Chodat); ~ Ray, a ray or 
plate of phloém between two 
medullary rays; ~ Sheath, a layer 
of thin-walled cells surrounding the 
vascular tissue next within the 
cortex, best seen in roots; Phloé- 
oter’ma (répua, a limit), the inner- 
most layer of primary cortex; 
Phloe’‘um+t, the cortical tissues ; 
Phlorid’zin (é/fa, a root), a white 
crystalline substance which gives 
the bitter astringency to the root- 
bark of the apple, pear, cherry 
and plum-trees; Phlorogiu’cin, a 
body of frequent occurrence in 
the bark of trees, derived from 
glucosides. 
phoenic’eous, phoenic’eus (Late Lat.), 
scarlet ; red with a little of yellow 
added. 
phoeos’ porous = PHAEOSPOROUS. 
Phoran’thium (gopos, bearing, dvos, a 
flower), the receptacle of the capi- 
tulum in Compositae. 
Pphoteol'ic (@ws, gwros, light, alddos, 
moving, motile), used of the sleep 
of plants; pho’tic, exposed to light, 
well-illuminated, as the margins 
of pools, etc.; Photo-aesthe’sia 
(dicOnows, perception), Csapek’s 
term to express the power of an 
organ to respond to the stimulus 
of light ; Photo’bia (ios, life), pl., 
Tulasne’s term for ectoparasitic 
Fungi; photocleistogam’ic (+ CLEIs- 
TOGAMIC), used of flowers which do 
not open in consequence of the 
rapid growth of the outer side 
of the petals, due to PuHoro- 
Hyponasty (Hansgirg); Photo- 
epinas’ty ( + Epinasty), epinasty 
induced by the action of light 
(Detmer); photogenic (yevrdw, I 
produce), used of bacteria which 
are luminous; Photohyponas’ty (+ 
Hyronasty), hyponasty caused by 
the effect of light (Vines) ; photo- 
kine’tic (xwy7iKos, having the power 
of movement), moving in conse- 
quence of the stimulus of light ; 
N 
193 
photomet’ric (uérpov, a measure), 
(1) applied to organisms which turn 
either end to the direction of the 
light-rays ; (2) leaves which assume 
a definite position in light, to obtain 
the most of it, or to screen them- 
selves from too much (Wiesner) ; 
Photol’ysis (Avots, a loosing), the 
arrangement of chlorophyll granules 
under the stimulus of light, includ- 
ing both apostrophe and epistrophe; 
Photomorph’osis (udpdwors, con- 
figuration), that kind of mechano- 
morphosis which depends upon light 
as the cause ; Photosyn’tax (ovTatw, 
I put together), the formation of 
complex carbon compounds from 
simple ones under the influence of 
light (Barnes); Photosyn’thesis 
(vvOeots, a putting together), a 
proposed emendation of ‘‘photo- 
syntax”; phototac’tic (raxrixos, 
qualified to arrange in order), 
trasburger’s term for taking up a 
definite position with regard to the 
direction of light-rays ; phototon’ic 
(révos, tension), the increasing irri- 
tability by the influence of light; 
Photot’onus, the normal mobile 
condition resulting from the alter- 
nation of day and night ; Photo- 
tax’is (rdéis, order), the definite 
self- arrangement of organisms 
under the stimulus of light ; Photo- 
trophy (rpopy, food), unequal in- 
crease on one side of an organ, due 
to the incidence of light in relation 
to the parent shoot (Oltmanns) ; 
Photot’ropism (rpory, a turning), a 
synooym of HELIOTROPISM ; Pho’- 
trum, 8. L. Moore’s term for the 
whole scale of illumination affect- 
ing PHOTOLYSIS. 
Phrag’ma, pl. Phrag’mata (dpd-yua, 
an enclosure), a spurious dissepi- 
ment in fruits ; phrag’mifer (fero, 
I bear), phrag’miger, phragmig'erus 
(gero, I bear), divided by partitions; 
Phragmobas‘id, Phragmobasid’ia, 
pl. (+ Basin), septate basidia in 
Basidiomycetes (Van Tieghem). 
Phragmite'tum, Warming’s term for 
an association of reeds, Phragmites, 
