PLATE III.
ORGANOGENY OF CANNABIS ♀.
Fig. 1-6.—Successive transverse sections through pedicel and lower part of ovary of
female flower of Cannabis to show position and destiny of the fibro-vascular
traces. (st., stipule; br. inv., involving bract; α, trace innerving the
involving bract; β, trace innerving the anterior, external, sterile carpel ;
γ, trace innerving the posterior, internal fertile carpel; δ, trace innerv-
ing funiculus of ovule; x, secondary trace derived from γ—after Briosi
and Tognini.
„ 7.—Vertical section through pe licel and base of ovary, showing the foregoing
traces, β, γ, δ and x—after Briosi and Tognini.
„ 8.—Apex of female inflorescence, showing earliest stages of development of
female flowers; ov., ovules; st. bracts, corresponding to stipules; br.
inv., involving bract; ax. fl., floral axis—after Briosi and Tognini.
„ 9.—Slightly more advanced stage of development of a female flower; ov. ovule ;
st., stipular bract; br. inv., involving bract—after Briosi and Tognini.
„ 10.—Young female flower; ov., ovule; car., ovary; per., perianth; br. inv. involv-
ing bract—after Briosi and Tognini.
„ 11.—Vertical section (diagrammatic) of young female flower, at an early stage
before the axillary position of the axial ovule is marked—after Briosi
and Tognini.
„ 12.—Vertical section (diagrammatic) of young female flower, to show the position
of the ovule as axillary to the posterior carpellary phyllome —after
Briosi and Tognini.
„ 13.—Young female flower, ovarian parietes hiding the ovule but the cavity net
yet closed—after Briosi and Tognini.
„ 14.—More advanced stage of young female flower, the opening contracted but still
unclosed—after Briosi and Tognini.
„ 15.—Further stage of female flower, the styles forming but not yet united at their
bases,—after Briosi and Tognini.
„ 16.—Still further stage of female flower, the cavity closed by union of the bases
of the styles, but the line of union still visible as a faint cicatrix—after
Briosi and Tognini.
„ 17.—Longitudinal section (diagrammatic) of recently closed ovary, showing
obcampylotropous ovule still destitute of ovular integuments—after
Briosi and Tognini.
„ 18-20.—Vertical section (diagrammatic) of young flower of female Cannabis,
to show development of ovule integuments—after Briosi and Tognini.
„ 21.—Young unfertilized ovary—after Schleiden, and from nature.
„ 22.—Vertical section of young unfertilized ovary—after Schleiden, and from
nature.
„ 23.—Vertical section of young ovary, to show commencement of development of
embryo—after Schleiden, and from nature.