The mouth of this chamber is protected by a ring of hairs pointing downwards, which allow the entrance but prevent the escape of small flies; after fertilization of the pistils the hairs wither. [Please select]
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The flower is very easy to examine, the floral envelopes, stamens and pistils, being plainly discernible. [Please select]
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Like many other wind-fertilized flowers, the stamens and pistils are collected on different plants--a plan which absolutely insures cross-fertilization, without the aid of the insects. [Please select]
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If the pollen were shed during perfectly calm weather, it would simply fall upon the ground, without reaching the pistils of neighboring plants at all. [Please select]
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