To J. D. Hooker 22 July 
Down Bromley Kent
My dear Hooker
I shall be very glad of the plants you mention with Tendrils.—1 I find now with 4 genera of climbing plants, which have no tendrils, that the upper free internode, night & day, sweeps a circle in 5 to 6 hours.—2 See what amusement I owe to you, all these plants & Cissus are from Kew!—
Thank Thomson for message about Tendrils of Cucurbitaceæ:3 I was thinking of asking & shd. be particularly obliged sometime for answer.— I thought from position that these tendrils were branches; but I find A. Gray in his Book calls them branches,4 & on looking at Vegetable Marrow, they did not seem to correspond so nicely with leaves as in my Echinocystis.— I shd be very glad to know whether Thomson spoke deliberately. As far as I have seen, little as yet, leaf-tendrils are sensitive but have not spontaneous movements, like tendrils of Cucurbitaceæ & Viniferæ.—5
Thank Oliver for note: I knew it was mere chance whether Hildebrand’s paper would do for N.H.R.—6 Hildebrand has two or three times been so obliging to me that I am bound to do what I can to gratify a little harmless vanity:7 I have sent it to “Annals” & Editors must settle whether worth inserting.8 In these Orchids the pollen-tubes must act like the spermathecas in insects—9
I am sorry you are so very busy so do not write any gossip for a long time, though I shd. enjoy it; but there is one point on which I do much want information. Thwaites has sent me seed of Limnothemium Indicum, which is grandly dimorphic, & he says sow it in “pan of water”; but I have no idea, how deep water ought to be & whether there ought to be Earth at bottom. Do you think Hugh Gower would know at all?10
I shall be glad to see Asa Gray’s letter.11 He tells me in a scrap about the £2000, which, I am heartily glad to hear of.12 He tells me he has no children, which he regrets because he cannot send a son to the war! Did you ever hear the like.—
GoodBye— | Yours affect | C. Darwin
How opposite our troubles are about Society— you too much, I absolutely none.—13
Differences between tendrils derived from leaves and those derived from branches.
CD on Asa Gray’s attitude on the Civil War.
Please cite as
Darwin Correspondence Project, “Letter no. 4250,” accessed on 25 September 2016, http://www.darwinproject.ac.uk/DCP-LETT-4250