. Botany for young people : Part II. How plants behave ; how they move, climb, employ insects to work for them, & c. Botany. 2G now I'LANTS EMPLOY INSECTS TO WOKK FOK TIIEJI,. Fig 13 Flower of Arethusa, entire, iengtliwise. Fig. 14. A sectioa hanging shelf, which is stigma, and so sticky that any pollen it may chance to have brought would be left adhering there. As the head slips by, it must next hit the front edge or visor of the hel- met-shaped anther, raise it on its hinge, and so allow one or more of the four loose pellets of pollen to drop out, or be brushed out by the insect's head,
. Botany for young people : Part II. How plants behave ; how they move, climb, employ insects to work for them, & c. Botany. 2G now I'LANTS EMPLOY INSECTS TO WOKK FOK TIIEJI,. Fig 13 Flower of Arethusa, entire, iengtliwise. Fig. 14. A sectioa hanging shelf, which is stigma, and so sticky that any pollen it may chance to have brought would be left adhering there. As the head slips by, it must next hit the front edge or visor of the hel- met-shaped anther, raise it on its hinge, and so allow one or more of the four loose pellets of pollen to drop out, or be brushed out by the insect's head, to which some of the pollen would stick. When the next flower is entered noth- ing is accomplished; but on departing, as before, any pollen on its head would be applied to the sticky shelf of stigma overhead, the lid then uplifted, and a fresh charge of pollen taken from this flower to be given to the next, and so on in succession. 53. It is not unlikely that the pellets of pol- len, as they fall out of the uplifted anther of Arethusa, may some- times miss the insect's head, or fail to adhere to it, and so be lost. But this plan, or something like it, serves the purpose in the por- tion of the Orchis Family of which Arethusa is the representative. In others of that family the result is made surer by considerably different, more economical, and wonderfully curious an-angements, — such especially as those 54. In Orchises and other plants of that particular tribe of the ''ofthl^nthS" Orchis Family. There is only one true Orchis in this country, and s^*""nupri!iJJ-t that not common, except northward. And its arrangement for fer- P"si'ion. tilization is not quite so readily understood as in those Orchises which are named by botanists Hahenaria, of which we have many species. Some of these are plen- tiful, such as the Fringe Orchises, either the purple, white, or j'ellow species. The Greater Green Orchis is not so common, but is taken for the present illustra- t
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1872
