• Darwin Archive | Botanical and geological notes and drafts, 1840s-1860s | Draft and notes: 'On the sexual relations of the three forms of Lythrum salicaria', 1864 - 1865 | 'On the sexual relations of the three forms of Lythrum salicaria' J. Linn. Soc. (Botany) 8 (1865): 169-196. Draft (DAR 27.2A) 72878, Portfolio (DAR 27.2B) | It is pretty proof that pollen carried on proboscis that in short-styled plants branches pressed against net had been well fertilised by bees which could only insert probosces, 1863-08-31

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