. The classification of flowering plants. Plants. Ill] CONIFERAE 93 bract, which becomes fleshy in the fruiting stage; the single integument becomes hard and is surrounded at the base by a short fleshy cup-like aril. In the monotypic genus Microcachrys (fig. 36, G—I) a number of small ovoid spirally arranged bracts form a small cone at the end of a short vegetative branch the small, densely crowded leaves of which are decussate. Each bract bears a single inverted pendulous ovule from the incurved upper margin; the ovule becomes partially surrounded at the base by a cup-like fleshy aril. The br
. The classification of flowering plants. Plants. Ill] CONIFERAE 93 bract, which becomes fleshy in the fruiting stage; the single integument becomes hard and is surrounded at the base by a short fleshy cup-like aril. In the monotypic genus Microcachrys (fig. 36, G—I) a number of small ovoid spirally arranged bracts form a small cone at the end of a short vegetative branch the small, densely crowded leaves of which are decussate. Each bract bears a single inverted pendulous ovule from the incurved upper margin; the ovule becomes partially surrounded at the base by a cup-like fleshy aril. The bract also becomes Fig. 35. A. Taxus haccata, ovule-bearing shoot in longitudinal section; a, apex of main axis of which the ovule-bearing shoot is an axillary branch; ar, aril; i, integument; n, nucellus of ovule. B. , female cone. C. Transverse section through the same, shewing an opposite pair of cone- scales, each subtending two ovules. D. Female cone of Cupressus sempervirens. E. Single scale subtending numerous ovules. (After Kerner.) F—L. Juniperiis communis. (After Berg and Schmidt.) F. Whorls of ovules and scales, one of the latter turned back. G. The same in transverse section. H. Kipe "; I. The same in transverse section. J. Longitudinal section of seed. K. Male cone. L. Single stamen. M. Stamen of Taxus baccata; p, pollen-sacs. N. Stamen oi Araucaria, side view; p, pendent pollen-sacs. In Podocarpus (fig. 86, D—F) the short ovule-bearing shoot bears several bracts, which are often united wdth the axis and ultimately form wdth it a succulent mass (whence podocarp). An anatropous ovule springs from the axil of one or two of the uppermost bracts, above which it is carried by the funicle, w^hich is adherent below^ to the fleshy bract. The ovule has two integuments; the inner becomes w^oody, the outer fleshy, in the seed. In the second sub-order, Pinaceae, to which belong the great majority of the genera and species, the fertile
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
