. The classification of flowering plants. Plants. V] GRAMINEAE 231 protogynous. The species of Wheat are generally self-pollinated, and in some cultivated races of Barley the flowers never open. Markedly cleistogamic species are Leersia oryzoides and Amphi- carpum Purshii, where the conspicuous terminal panicle is quite barren. Leersia has a fertile lateral inflorescence which never leaves the leaf-sheath, while in Amphicarpum the fertile spikelets are borne upon filiform runners at the base of the culm. In some grasses the antipodal cells shew considerable de- velopment after fertilisation, d
. The classification of flowering plants. Plants. V] GRAMINEAE 231 protogynous. The species of Wheat are generally self-pollinated, and in some cultivated races of Barley the flowers never open. Markedly cleistogamic species are Leersia oryzoides and Amphi- carpum Purshii, where the conspicuous terminal panicle is quite barren. Leersia has a fertile lateral inflorescence which never leaves the leaf-sheath, while in Amphicarpum the fertile spikelets are borne upon filiform runners at the base of the culm. In some grasses the antipodal cells shew considerable de- velopment after fertilisation, dividing to form a many-celled. Fig. 107. Arrlienathcrum avenaceum. 1, unopened and 2, open anther, x 12, 3, spikelets open and exposing the stamens and stigmas; 4, the pollen escaping and being dusted on to the stigmas; x about 5. From Ward after Kerner. parenchymatous tissue in the lower end of the embryo-sac. The embryo-sac grows at the expense of the tissues of the nucellus, of which one to two layers only are left, and becomes filled with endosperm. The club-shaped embryo has a lateral depression, above w^hich develops a terminal structure which. 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 Rendle, A. B. (Alfred Barton), 1865-1938. Cambridge, University press
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
