. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 346 FEMALE CONES largements, between the cuticle and tlie inner laj'cr of tlie membrane ; these contain water, which subsequently evaporates, thus leaving two bladders which act as wings (Fig. 204, A, w.). The ovules (megasporangia) of the Yew (Taxus) usually occur singly within small buds, which arise in the axils of the leaves and are generally spoken of as female cones ; they closely re- semble the ordinary vegetati\'e buds. Each such cone bears several minute scales, the single ovule occupving a terminal
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 346 FEMALE CONES largements, between the cuticle and tlie inner laj'cr of tlie membrane ; these contain water, which subsequently evaporates, thus leaving two bladders which act as wings (Fig. 204, A, w.). The ovules (megasporangia) of the Yew (Taxus) usually occur singly within small buds, which arise in the axils of the leaves and are generally spoken of as female cones ; they closely re- semble the ordinary vegetati\'e buds. Each such cone bears several minute scales, the single ovule occupving a terminal position with the micropjde facing outwards. The ovule is peculiar in possessing, apart from the usual integument, a second ( Fig. 201.—The Yew (Taxus baccata). a, branch bearing two ripe -seeds ; b, a ripe seed in longitudinal section, showing the aril (ar.) ; c, single male cone, enlarged ; d, single microsporophyll ; e, branch with male cones, [d after Eichlcr ; the rest original.) protective covering termed the aril, which remains inconspicuous till after fertilisation. It then de\-elops into a bright-coloured fleshy cup in\'esting the seed (Fig. 201, a, b). In most Conifers, however, more or less numerous ovules are found within each of the fe)iialc cones, and these in the Monke}^ Puzzles [Araucaria), for instance, may attain considerable dimen- sions. The cones themselves occupy diverse positions. Thus, in the Scotch Fir (Fig. 200, on the left) they first appear as small reddish structures, situated at the ends of short stalks, just beneath the apical bud of the current 3-ear's growth. In the Larch, where they are larger and of a bright crimson colour, they terminate some of the dwarf-shoots, with a rosette of green. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Fritsch, Felix Eugene, 1879-; Sa
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpl, booksubjectplants
