Plants and their ways in South Africa . Fig. 128. -Stamens of Cyanella ca-pensis, L, Fig. 129.—Section through flower ofBarosma crenulata, Hook., after theremoval of the petals (magnified): st,fertile stamens; sto, barren stamens(staminodes); d, lobes of disk. (FromEdmonds and Marloths ElementaryBotany for South Africa.) base of the anthers (basifixed). In Jasmine the filaments ex-tend between the anthers (adnate) In grasses and in Bulbinellathe filaments are so joined to the centre of the anther at the backthat they easily swing (versatile). Versatile anthers are fre-quently found where polle
Plants and their ways in South Africa . Fig. 128. -Stamens of Cyanella ca-pensis, L, Fig. 129.—Section through flower ofBarosma crenulata, Hook., after theremoval of the petals (magnified): st,fertile stamens; sto, barren stamens(staminodes); d, lobes of disk. (FromEdmonds and Marloths ElementaryBotany for South Africa.) base of the anthers (basifixed). In Jasmine the filaments ex-tend between the anthers (adnate) In grasses and in Bulbinellathe filaments are so joined to the centre of the anther at the backthat they easily swing (versatile). Versatile anthers are fre-quently found where pollen is conveyed from them to the stigmasby wind. The continuation of the filament to which the antheris attached is called the connective. Examine anthers in buds. Usually the anther consists oftwo lobes. On cutting across the anther, each lobe will beseen to contain two pollen sacs or microsporangia. Whenthe pollen grains or microspores are ready to be discharged,the tissue separating the two pollen sacs of each lobe is brokendown and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1915
