KSIĄŻKI POWIĄZANE ZE SŁOWEM «OVULIFEROUS»
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1
University Botany Ii : (Gymnosperms, Plant Anatomy, ...
Ovuliferous scale. They are together known as megasporophyll. Bract scale is
small, thin and membranous. It develops directly from the cone axis. Ovuliferous
scale is rather stout, woody and arises on the upper surface of the bract scale.
S M Reddy, S J Chary, 2003
2
Gymnosperm (naked seeds plant) : structure and development
are the various theories which account for the much disputed morphlogical
nature of the ovuliferous-scale: 1 . Sachs and Eichler regard the ovuliferous-scale
as an outgrowth of the bract-scale comparable to the ligule of Selaginella or
placenta ...
Of these, three bigger lobes (central and two lateral ones) bear one inverted
ovule and two smaller ones are sterile. These lobes are laterally fused to form an
ovuliferous scale which, in turn, is fused with a bract to form a bract - scale
complex.
S. P. Bhatnagar, Alok Moitra, 1996
Michael G. Simpson. ovuliferous I .ovuliferous scale ovuliferous scale winged
seeds FIGURE 5.21 Conifers. A—F. Pinus spp. A. Young female cone, at time of
pollination. B. Close-up, showing ovuliferous scales and bracts. Note pollen
grains.
5
Botany For Degree Gymnosperm (M.E.)
(iii) Seed cone buds. become anatomically differentiated with the initiation of
bracts, formed directly from conspicuous cell pockets in the peripheral zone of
seed cone bud apex (Stage 1, Late March — April). Ovuliferous scale primordia
are ...
P C Vashishta, A K Sinha, Anil Kumar, P.C.Vasishta
6
Diversity and Systematics of Seed Plants
They considered the ovuliferous scale as an outgrowth of the bract scale, similar
to the ligule of Selaginella or the placenta of angiosperms. (2) Robert Brown (
1827) considered the ovuliferous scale as an open foliar carpel which is present
in ...
Dr. Singh, Dr. Pande & Dr. Jain, 2009
The sterile five lobes and three fertile lobes are fused to form a ovuliferous scale.
The ovuliferous scale is also fused with the subtending bract, at about its mid
point. The vascular supply to the bract and the ovuliferous scale are independent
...
8
Conifer Reproductive Biology
At fertilization, the conelet becomes a cone. The female strobilus is characterized
by a series of fertile or ovuliferous scales spiraling around an axis. It is defined as
a compound cone because each ovuliferous cone scale develops in the axil of ...
FEMALE CONE The female cone is an elongated, ovoid structure comprising a
central cone axis on which the ovuliferous scales and bracts are spirally
arranged in acropetal order. Usually the cone is 15-20 cms long but in P.
lambertiana they ...
Male strobili numerous, basally surrounded by scales; microspores without air
sacs. Female cones with both ovuliferous and bract scales, latter longer and
shorter than the former; cones globose or oblong, maturing and opening up in
first year ...
