The Different Forms of Flowers on Plants of the Same Species

The Different Forms of Flowers on Plants of the Same Species

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The Different Forms of Flowers on Plants of the Same Species by Charles Darwin

Published:

1877

Pages:

278

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1,844

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The Different Forms of Flowers on Plants of the Same Species

By

0
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Book Excerpt

S--continued.

Linum grandiflorum, long-styled form utterly sterile with own-form pollen.-- Linum perenne, torsion of the pistils in the long-styled form alone.--Homostyled species of Linum.--Pulmonaria officinalis, singular difference in self-fertility between the English and German long-styled plants.--Pulmonaria angustifolia shown to be a distinct species, long-styled form completely self-sterile.-- Polygonum fagopyrum.--Various other heterostyled genera.--Rubiaceae.--Mitchella repens, fertility of the flowers in pairs.--Houstonia.--Faramea, remarkable difference in the pollen-grains of the two forms; torsion of the stamens in the short-styled form alone; development not as yet perfect.--The heterostyled structure in the several Rubiaceous genera not due to descent in common.

CHAPTER IV.

HETEROSTYLED TRIMORPHIC PLANTS.

Lythrum salicaria.--Description of the three forms.--Their power and complex manner of fertilising one another.--Eighteen different un

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FEATURED AUTHOR - Megan Collins is the author of The Winter Sister and Behind the Red Door (Atria/Simon & Schuster). She received her B.A. in English and Creative Writing from Wheaton College in Norton, Massachusetts, and she holds an M.F.A. in Creative Writing from Boston University, where she was a teaching fellow. She has taught creative writing at the Greater Hartford Academy of the Arts and Central Connecticut State University, and she is Managing Editor of 3Elements Review.