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From H. C. Watson   14 June [1857]1

My dear Sir

Looking for something else, I stumbled on the passage extracted on preceding page. It seems to meet a query you some time ago addressed to me respecting the Limosella & Subularia, to which I was able to reply from personal observation only in respect to the former.—2

Very truly | Hewett C. Watson Thames Ditton June 14th

To C. Darwin | Esqe

[Enclosure]

9th. February 1843

Professor Graham read an account of a Botl. Excursion in Ross-shire during August, 1842.3

The party left Edinburgh on 21st. August, &c - - - - -

“The season having been remarkably dry, all the lakes were far below their usual level, & in consequence such plants as Lobelia Dortmanna, Subularia aquatica, &c. were seen in flower and fruit on dry ground”— Trans. Bot. Soc. Edinb. vol. 1, p. 201.4

1
Dated by the reference to Watson’s previous letter on Limosella and Subularia (see n. 2, below).
3
Robert Graham was professor of botany at Edinburgh University, 1820–45.
4
This information was not used by CD in his discussion of the possible cross-fertilisation of water plants (Natural selection, pp. 62–3). Subularia aquatica is awlwort.

Please cite as “DCP-LETT-2106,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-2106