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Figure 3.1: Pollen cone morphology and arrangement in Prumnopitys taxifolia.A : Young fertile branch or spike approximately 14 mm long bearing pollen coneprimordia (arrowheads) in the axils of the leaf-like bracts, Unlike the new vegetativeshoots (arrow), the emerging spikes are glaucous and erect. Photographed earlysummer (December). Scale = 5 mm.B : Fertile branch or spike approx. 50 mm long bearing young pollen cones in axils ofleaf-like bracts (arrowheads). Cones are approx. 3 mm long x 1 mm diam.Photographed in autumn (March).C : Branched pollen cones can occur. In this specimen there are five branched cones(arrowhead) and several abnormally short cones (arrow).D : Mature pollen cones just prior to pollen dispersal. Leaf-like bracts have been shed.Pollen cones have become crowded towards apex of spike (arrow), due to reducedinternode growth. Cones up to 15 mm long and approx. 2 mm diam.E : Pollen cone and spike lengths vary with the individual. These were photographedin late winter (August) on a smalltree propagated by a cutting from adult foliage.F : Young pollen cone in early spring (September). The developing microsporangiaare concealed by the overlapping scale tips (arrowheads). Scale = 1 mm.G : Mature pollen cone in late spring (November). On each microsporophyll the twofree sporangia (arrowheads) are greatly expanded, while the scale tips are unchanged,Scale = 1 mm.
FFig.3.1
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Page 5: o P. taxifoliao P. ferruginea_ 5-.
Page 9 and 10: Fig. 3.2
Page 11 and 12: [..#Hll,';',i. IFig. 3.3
Page 15 and 16: .'TA,{-t,I-t-_--lr:Tfii: i, 1,..1;1
Page 20 and 21: Figure 3.8: Sporangial wall of the
Page 22 and 23: Figure 3.9: (Prumnopitys taxifolial
Page 24 and 25: Figure 3.10: Development of the mic
Page 26 and 27: Figure 3.1 1: (Prumnopitys taxifoli
Page 28 and 29: Figure 3.12: Germination of the mic
Page 30 and 31: Figure 3.13: The exine, intine and
Page 32 and 33: Figure 3.14: Cellular and free-nucl
Page 34 and 35: Figure 3.15: Germinated pollen grai
Page 36 and 37: Figure 3.16: Development of the mal
Page 38 and 39: Figure 3.17: Pollen tube and body c
Page 40 and 41: Figure 3.18: The body cell nucleus
Page 42 and 43: Figure 3.19: Targetting of archegon
Page 44 and 45: Figure 3.20: The male gametes in Pr
Page 46 and 47: Figure 4.1: Morphology and developm
Page 48 and 49: Figure 42 : Earl development of tlt
Page 50 and 51: Figure 4.3 : Initiation of fertile
Page 52 and 53: Figure 4.4 : The ovular complex at
Page 54 and 55: Figure 4.5: (Prumnopitys taxifolial
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Figure 4.6:The nucellus cone before
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Figure 4.7: Post-pollination develo
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Figure 4.8: Transverse sections of
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Figure 4.9: Tissues of the one year
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Figure 4.10: (Prumnopitys taxifolia
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Figure 4.12: Development of the meg
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Figure 4.13: Megaspore tetrads in P
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Figure 4.14: Development of the fem
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Figure 4.16: Occasionally two or ev
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Figure 4.17: ln Prumnopitys taxifol
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Figure 4.18: Features of the centra
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Figure 4.19: Characteristics of the
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Figure 4.20: The archegonium reache
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Figure 4.21: The developing central
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Figure 4.24: Stages in the maturati
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Figure 4.25: Volumes of thirty-thre
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Figure 4.28: Up to four archegonia
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Figure 4.29: The cell wall of the m
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Figure 4.30: Some characteristics o
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Figure 4.31: Another example of an
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Figure 4.33: Electron micrographs o
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Figure 4.34: Electron-micrographs o
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Figure 5.1: lntact and penetrated n
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Figure 5.2 Material from the pollen
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Figure 5.3: ln Prumnopitys taxifoli
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Figure 5.5 After fertilization, the
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Figure 5.6: Unfertilized archegonia
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Figure 5.7: Changes in unfertilized
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Figure 5.8: An unusual archegonium
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Figure 5.13: Outside the newly cell
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Figure 5.15: ln Prumnopitys taxitol
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Figure 5.16: Five-celled and eight-
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Figure 5.17: Some proembryos can ha
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Figure 5.18 : ln Prumnopitys taxifo
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Figure 5.19: ln Prumnopitys taxitol
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Figure 5.20: The middle of the susp
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Figure 5.21 : ln Prumnopitys taxifo
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Figure 5.24: Within the female game
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Figure 5.25: Transverse sections of
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Figure 5.26: One embryo was observe
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Figure 5.27: The dehiscence zone in
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Figure 5.28: Transition between hyp
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Figure 5.29: In the germinating emb
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Figure 5.30 : Further tissue develo
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Figure 5.31: In the germinating emb
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