Image from page 163 of "The story of the plants [microform]" (1899)

Title: The story of the plants [microform]

Identifier: cihm_39552

Year: 1899 (1890s)

Authors: Allen, Grant, 1848-1899

Subjects: Plants; Botany; Plantes; Botanique

Publisher: London : G. Newnes

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Text Appearing Before Image:

156 THE BTOBY OF THE PLANTS. it has below it what seems at first sight to be a big green calyx of very numerous sepals. What is this deceptive object ? Well, it is called an invokccref and it really acts to the compound flower-head very much as the calyx acts to the single blossom. The florets having got rid of their sepa- rate calyxes, the flower-head pro- vides itself with a cup of leaves (technically called bracts) y which pro- tect the unopened head in its early stages, and serve to keep off ants or other creeping insects exactly as a calyx does for the single flower. Inside this invo- lucre, again, all the florets of the thistle are equal and similar. Each has a tiny calyx, hardly recognis- able as such, made up of feathery hairs which cap the inferior ovary. Within this fallacious calyx, once liaore, the floret has a purple corolla

 

Text Appearing After Image:

PIG. 36.—FLOWER - HEAD OP A THISTLE, CONSISTINQ OP VERY NUMEROUS PURPLE FLORETS, ALL EQUAL AND SIVIILAR.

  

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