. A manual of Indian botany. Botany. POLLINATING AGENTS 123 and submerged, and bears long, ribbon-shaped clusters of radical leaves. The male flowers (A) are sessile, and situated low down amongst the radical leaves. The female flowers (b), on the other hand, are borne upon long stalks, which, remaining spirally coiled, keep the flowers under water. When the male flowers mature, they get detached from the plant and ascend to the surface of the water, on which they float freely,. A B Figf. 108.—Pata-shaola {Vallisneria spiralis) being swayed hither and thither by the wind. By a curious instinct
. A manual of Indian botany. Botany. POLLINATING AGENTS 123 and submerged, and bears long, ribbon-shaped clusters of radical leaves. The male flowers (A) are sessile, and situated low down amongst the radical leaves. The female flowers (b), on the other hand, are borne upon long stalks, which, remaining spirally coiled, keep the flowers under water. When the male flowers mature, they get detached from the plant and ascend to the surface of the water, on which they float freely,. A B Figf. 108.—Pata-shaola {Vallisneria spiralis) being swayed hither and thither by the wind. By a curious instinct the stalks of the female flowers are at the same time uncoiled, bringing the hitherto sub- merged female flowers to the surface. "After selecting their husbands, the female flowers sink to the bottom of the tank by (again) coiling up their long ; The fruits ripen under water and germinate in the mud. Hydrilla verticillata is another common submerged dioecious weed (a kind of jhangi) of our tanks. The short-pedicelled male flowers are solitary. At the time of pollination they separate from the plant and float. 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 Bose, G. C. London, Blackie & Son Ltd.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1920
