Cruger, Dr., on cleistogamic fertilisation of Epidendrum.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

The cleistogamic flowers of Viola are used in the discussion on.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

Cruger's case here referred to is doubtless the cleistogamic fertilisation of Epidendrum, etc.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

One chapter will be devoted to cleistogamic species, and I will just notice your new grass case.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

The pollen of the closed imperfect cleistogamic flowers differ in the transparency of the integument, and.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

Leersia oryzoides was for a long time thought to produce only cleistogamic and therefore autogamous flowers.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 1] Reference

Thus, in our common dog-violet the perfect flowers rarely produce seed, while the rudimentary cleistogamic flowers do so in abundance.    From Wordnik.com.  [Darwinism (1889)] Reference

I have some grand plants (and I formerly sent seeds to Kew) of the cleistogamic grass, but they show no signs of producing flowers of any kind as yet.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

The sweet violet also produces abundance of seed from its cleistogamic flowers, and few from its perfect flowers; but in Liguria it produces only perfect flowers which seed abundantly.    From Wordnik.com.  [Darwinism (1889)] Reference

In almost every order we find some plants which have become thus reduced or degraded for wind or self-fertilisation, as Poterium and Sanguisorba among the Rosaceae; while this has certainly been the case in the cleistogamic flowers.    From Wordnik.com.  [Darwinism (1889)] Reference

The argument in favour of this view is now much stronger than when he wrote; for not only have we reason to believe that most of these wind-fertilised flowers are degraded forms of flowers which have once been insect fertilised, but we have abundant evidence that whenever insect agency becomes comparatively ineffective, the colours of the flowers become less bright, their size and beauty diminish, till they are reduced to such small, greenish, inconspicuous flowers as those of the rupture-wort (Herniaria glabra), the knotgrass (Polygonum aviculare), or the cleistogamic flowers of the violet.    From Wordnik.com.  [Darwinism (1889)] Reference

The latter part of Letter 591 refers to the cleistogamic flowers of Viola.).    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

Leersia oryzoides, cleistogamic flowers of.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

Termites compared with cleistogamic flowers.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

cleistogamic flowers of.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

238; cleistogamic, 298.    From Wordnik.com.  [Alfred Russel Wallace Letters and Reminiscences]

Curiously like cleistogamic flowers. ").    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference