Procarp 
Promycelium 
ally formed ; Pro’carp, Procar’pium 
(kapros, fruit), an archicarp with a 
special receptive organ, the tricho- 
gyne. 
proce’rus (Lat.), very tall, as a tree. 
Pro’cess, Proces’sus (Lat., a prolon- 
gation), any projecting appendage, 
Proces'sus Hyme'nit, ‘‘the aciculae 
of certain Fungals”’ (Lindley). 
procum’bent, procum’bens (Lat., 
leaning forward), lying along the 
ground. 
Prob’able Er’ror, see DEVIATION, PRO- 
BABLE. 
Prod’ucts, substances resulting from 
metabolism or chemical changes in 
plants. 
Produc’tum } (productus, lengthened), 
=CALcar. 
Pro-em’bryo (pro, for, + Empryo), (1) 
in Characeae, the product of the 
oospore, upon which the Chara- 
plant develops as a lateral bud; 
(2) in Archegoniatae the product of 
the oospore before differentiation 
of the embryo; (3) ¢ the youngest 
thallus of a Lichen ; proembryon‘ic, 
relating to a pro-embryo, as the 
~ Branch in Chara, a propagative 
body having the structure of a 
pro-embryo arising from a node of 
the stem. 
proé’minens (Lat., projecting), used 
of an unusually extended part. 
progam’etal (pro, for,+GAMETE), of 
the nature of a Progam’ete, a cell 
which divides to form gametes, or 
occasionally passes into a gamete 
(Hartog). 
Progam’etange, Progametan’gium 
(ayyetov, a vessel), resting bodies in 
Protomyces macrosporus, Unger; 
progam’ic (Hartog), pro’gamous, 
in advance of fertilization ; ~ Cell, 
a cell formed in the pollen-grain 
which has the sperm-nucleus 
(Goebel). 
progred'iens (Lat., advancing), ex- 
tending at one part, and dying in 
the rear. 
progres’sive (progressus, an advance), 
advancing ; ~ Metamorph’osis, the 
appearance of organs in an ascend- 
ing scale, as when petals are re- 
placed by stamens; opposed to 
RETROGRESSIVE METAMORPHOSIS. 
Progym’nosperms (pro, for, + Gym- 
nosperm), prototypic Gymnos- 
perms, as Bennettites (Saporta and 
Marion). 
Projectu’ra (Lat., a jutting out), a 
small longitudinal projection on 
some stems where the leaf ori- 
ginates. 
Proios‘pory = PRospPorY. 
Prokine’sis (po, before, xlyyow, a 
moving), the early stage of nuclear 
division, up to the AsTrR. 
pro’late(prolatus, a bringing forward), 
drawn out towards the poles. 
Prole (Crozier), = Pro‘les (Lat., off- 
spring), (1) progeny ; (2) sometimes 
used for race ; (3) ¢ the species. 
Prole’psis (rpd\nys, anticipation), (1) 
a foreshadowing, something of an- 
ticipation ; (2) ‘‘hurried develop- 
ment as in the disease known as 
‘peach - yellows’ where axillary 
buds develop into branches the 
first year” (Crozier) ; prole’pticus 
(Lat.), used by Wimmer instead of 
PRAECOX. 
Proleta’rian (proletarius, a citizen of 
the poorest class), a name suggested 
by M‘Leod to denote plants having 
only a small reserve, and self-fer- 
tilized ; ¢f. CAPITALIST. 
prolifer, proliferus, proliferous 
(proles, off-spring; ero, I bear), 
bearing progeny as_ offshoots; 
Prolifera’tion, Prolifera'tio,develop- 
ment proliferously ; prolific, pro- 
lifficus (M. Lat., producing off- 
spring), fruitful, fertile ; Prolifica’- 
tion, the production of terminal 
or lateral leaf-buds in a flower ; 
prolig’erous, -rus (gero, I bear), 
proliferous, in Lichens applied to 
the spore-bearing portion of the 
apothecium (Henslow) ; cf. Lamina 
PROLIGERA. 
prom’inent, prom inens (Lat., jutting 
out), standing out beyond some 
other part. 
Promycele’ = Promyce’lium (pro, for + 
Myozium), the short-lived pro- 
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