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.