RECORD: Darwin, C. R. 1862.11.18-1863.01.23. Grandchildren of plant on shelf. CUL-DAR108.40-49. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR108-111 contain material for Darwin's book Forms of flowers (1877).

John Horwood (1823-c.1880) was the head gardener of Darwin's neighbour G. H. Turnbull. 1862-1863 Horwood superintended the building of Darwin's hothouse. Darwin acknowledged his assistance in Orchids, p. 158.


(1A

Novr 18th 1862. Grandchildren of plant on shelf

One of Horwoods seedlings (D) flowered & pulled up (a)

(a second one pulled up.)

Mid-styled — stigma in middle of anthers

Nov. 28th. C. {6 long-styled flowers self-fertilised Black worsted 2 fl by pollen of short-styled B white wool

I suspect one of these crossed wrong ie one heteromorphically insted of homomorphic; so if one very different no. of seed reject it.—

Dec. 6th C. 6 6 fl self-fertilised Black thread

… 4 fl by pollen of B white thread

― 17 6 C 6 fl. self-fertilised Black thread — Homomorphic.

 4 fl. by pollen of B White thread quasi Heteromorphic.

Nov. 28. B 4 fl short-styled self-fertilised by own form pollen black worsted

Dec. 6. B 5 fl self-fert. by own- black wool

― B 2 fl by pollen of long-styled C. white wool

― 17 16 B 3 fl self-fertilised Black wool. wood Homomorphic

B 4 fl by pollen of C white wool — quasi Heteromorphic

Dec. 21. A short-styled self-fertilised Black-thread (pollen seems food & very abundant

 25. A— 1. do

― 31 A— by pollen of long-styled C. white thread

Jan 6th. A. 2 self Black Thread

When A is [few words illeg]

— 1 pollen of C. white thread.

― 16 2 white thread — 3 Black thread.

― 23 5. Black— thread. —

Auricula & C. flowers of

[1Av]

It agrees with law of spec characters which differ much in species (ie length of pistil) differing in d individuals of same species — this fact of P. Sinensis varying sexually, though is so important a manner functionally

(a) Dec. 15 gathered pulled up a third flower plant of Horwood D same sort of mid-styled.— a 4th pulled up.: a 5th pulled one of these D had smooth petals like nearly all C.' (so modify statement): in one of D. stigma projected a little above anther which are seated low instead of being surrounded by them as in all others.— 6th plant pulled up; this had the stigma a little above anthers.

(D) self-fertilised 7 5 flowers Dec. 25— I see all Jan 6th self-fertilised 3 flowers Black thread plants D are very dwarf for sure than C

Jan 16 Three more flowers Black thread

11 flowers self-fert

(2A

Dec. 6 (D.) I examined one of Horwoods seedlings, I find that stamens do not rise so high as D in short-styled; & style rises higher than in do; so that in both organs in intermediate condition.)

(I have just— examined an Auricula, in which stamens are long & pistil came up nearly to base, so approaches to long-styled. (mem. Reversion in Oxlips.) Auricula

Dec. 11. I have examined another of D & I find that stamens seated low down just as in Long-styled; but the & stigma pistil not hardly higher than in is as in short-styled: here change has exclusively, or almost, in length of stamens pistil: I feel almost certain (see D notes) that last year the parent wa had longer stamen at mouth of corolla & a pistil nearly as long as in & long-styled— This year both are short, instead.

D 7th. plant in pot pulled up/ 8th & 9th pulled up/ 10th & 11th pulled up. 12th & 13th pulled up — — so with 3 in pots makes 16 all midstyled

Plants of D. —

A (3

Dec. 17th. 1862 — I counted Seedlings

A., 2 not flowered

B— 15 plants all short-styled which have yet flowered, with fine red fringed flowers

C

C — 24 plants all that have flowered long-styled (a) Back

24 [+] 27 [=] 51

D. Horwoods Seedling 4 in Pots, (but one will die) & several in pan, some already pulled up. — One produced only monster flower — in fact only one plant left

[3Av]

(a). Jan 3d. One of C. has stigma within tube of corolla, decidedly shorter than in other C'.— And we have seen amongst D one had stigma decidedly above anthers, between them & above C very little difference so that undoubtedly they graduate into each other.

(4A

Dec. 17th 62. When I saw the long-styled C young seedlings growing so fast, I think I shd have very fine flowers, but to day as Lettington called remarked the whole lot seem to have gone back to a wild state like in shape common primrose (N.B if this be reversion bears on these becoming mid-styled) Though in ordinary seedlings, whence these have some generations ago descended vary; yet it was most striking to see what a poor lot these were in small pale, rather narrow petals, sometime not touching, flat with edge smooth & in middle deeply notched. The seedlings B. had larger flowers darker purple, broader so as to almost overlap with whole margin waved & notched. Of C. which have already flowered 3 are slightly wave on margin of petals all rest quite smooth. — Yellow centre conspicuous.—

There is no doubt that C. were ahead of Horwoods seedling D & both A & B at one time.—

Decr 19th. Certainly great majority of A & B are still smaller plants than C; four of B are nearly as large.—

(5A

Jan 6th 1863

(C.) long styled 5 flowers by pollen of short-styled B A white Bobbin

(C.C.) rather — short-styled flower of long-styled class with own pollen 2, black-threads

Jan 16. 3 more flowers. do — But in some flower stigma almost full length:

one plant of D in pot with with all anthers mid-nectary or des rather destitute of pollen & shrivelled dark brown & shrivelled & never dehisce — a very dwarf-plant— may be said to "contabescent"

Jan 21. I carefully examined pollen of this one whole plant & I found pollen consisting of millions of most minute cells which did not swell — utterly worthless— All female organs perfect — will explain probably contabescence. — One or two flowers on this plant had perfect anthers! I found some contabescent anthers in long-styled C.

6A

[blank]

[6Av]

D "Seedlings from Horwoods seedlings — mid-styled. "These are grandchildren of Horwood from "original plants— sown Jun 1. 1862. Copy of Label.

(6

(C) (Summary)

[table not transcribed]

 

(7

C fertilised by themselves

23 Plants produced 49 pods of which 34 developed seed

[table not transcribed]

Say 23 plants produced 311 seeds— whilst 13 long-styled plants produced 25.9 grain of seed, calculate how many.)

[calculations not transcribed] (9.11 seed if all included))

(22.2 average, if all beneath 10 omitted but the 20 pods contained beneath 10 seed — And 15 contained no seeds.

If only these below 5 with 5 & below omitted, then we have 24 pods & average of only 16.4 per pods. There are 10 pods with 5 or less seed.

(8A

one Plant (C.C.) one of C. lot with pistil rather shorter but variable

[table and calculations not transcribed]

(Black thread fertilised with own pollen)

5 8 flowers self fertilise, all produced pods containing on average 43 seeds each.

(9A

D Horwoods seedlings.

[table and calculations not transcribed]

I never before saw such numbers as 82 & 97— 74 largest ever from Heteromorphic alliance number before I believe — If, as I believe descended from long-styled, which is less fertile, still more striking

to 66. 67

(10A

December 12— 1862. Mr Horwood saved some of his old Plants of last year of "Ducks seedlings", & I have just seen one flower from each: there are 7 long-styled; & two with stamens as in long-styled i.e. low, but with pistil just reaching to their middle.

Mr H. [Horwood] saved seed from Ducks seedlings last year, & now I have examined one flower from 16 plants, 12 are like my seedlings D from "Horwoods Seedlings" viz stamens short, as in long-styled, but with pistil reaching only to middle of anther; 2 belong to this same class, but have stigma reaching a little above anthers; & 2 are regularly long-styled. —


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

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