. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. Cultivated-Plant Study 627. Iris in btossom. Photo by Verne Morton. its purple and yellow tip and many guiding lines although far from the center of the flower, is the sure path to the nectar, A bee alights on the lip of the sepal, presses forward scraping her back against the down- hanging stigma, then scrapes along the open anther which lies along the roof of the tunnel; and she here finds a pair of guiding lines each leading to a nectar-well at the very base of the sepal. The bees
. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. Cultivated-Plant Study 627. Iris in btossom. Photo by Verne Morton. its purple and yellow tip and many guiding lines although far from the center of the flower, is the sure path to the nectar, A bee alights on the lip of the sepal, presses forward scraping her back against the down- hanging stigma, then scrapes along the open anther which lies along the roof of the tunnel; and she here finds a pair of guiding lines each leading to a nectar-well at the very base of the sepal. The bees which Dr. Need- ham found doing the greatest work as pollen-carriers were small solitary bees (Clisodon terminalis and Osmia destructa); each of these alighted with precision on the threshhold of the side door, pushed its way in, got the nectar from both wells, came out and sought another side door speedily. One might ask why the bee in coming out did not deposit the pollen from its own anther upon the stigma; but the stigma avoids this by hanging down, like a flap to a tent, above the entrance, and its sur- face for receiving pollen is directed so that it gathers pollen from the entering bee and turns its back to the bee that is just making its exit. The arrangement of the flower parts of the iris may be described briefly thus: three petals, three sepals, a style with three branches; the latter being broad and flat and covering the bases of the three sepals, making tubes which lead to the nectar; three anthers lie along the under side of the styles. The wild yellow iris is especially fitted for welcoming the bumblebee as a pollen-carrier, since the door between the style and the sepal is large enough to admit this larger insect. The bumblebees and the honey-bees work in the different varieties of iris in Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illus
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Keywords: ., bookauthorcomstockannabotsford1, bookcentury1900, bookdecade1910
