The flower and the bee; plant life and pollination . shrivel and the four stigmaticlobes diverge, forming a cross, which a hawk-moth cannot failto touch. However it may have been in the past, the flowersat the present time do not appear to attract a sufficient numberof visitors, for according to the observations of De Vries inEurope and of Davis in America they are regularly pollinatedin the bud. (Fig. 70.) Close by the evening-primrose I often find the night-floweringcatchfly {Silene noctiflora), called catchfly because the wholeplant is viscid, hairy, and destructive to many small flies. The
The flower and the bee; plant life and pollination . shrivel and the four stigmaticlobes diverge, forming a cross, which a hawk-moth cannot failto touch. However it may have been in the past, the flowersat the present time do not appear to attract a sufficient numberof visitors, for according to the observations of De Vries inEurope and of Davis in America they are regularly pollinatedin the bud. (Fig. 70.) Close by the evening-primrose I often find the night-floweringcatchfly {Silene noctiflora), called catchfly because the wholeplant is viscid, hairy, and destructive to many small flies. Thesmall white flowers open at sundown, but I have found themvery sparingly visited by moths. (Figs. 71, 72, and 73.) Of the other moth-flowers only a few of the more commoncan be mentioned here; they are characterized by having whiteor nearly white flowers which open in the evening, have long 150 NOCTURNAL OR HAWK-MOTH FLOWERS corolla-tubes, and are sweet-scented. In the pink family thereare the sand-pink {Dianthus arenaria), bouncing bet {Saponaria. Fig. 70. Evening-Primrose. (Enothera biennis A hawk-moth flower officinalis) common along roadsides (Fig. 74), white lychnis(L. album), and evening-lychnis {L. vespertina), and thelong-flowered catchfly {Silene longiflora), and the nodding 151
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