RECORD: Darwin, C. R. 1866.07.08-08.04. Lythrum Exper[iments] for 1866. CUL-DAR109.B87. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 11.2022. 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).


[B87]

Lythrum Exper: for 1866

Measure

Observe 112 whether long-styled & new do seedling & 68, what form. Allow no 10 to flower, pollen will not burst so little

Preserve 10 long-styled & 6 & measure how tall ─ (old lot.)

Cut all else down, except from 22 to 33 both inclusive & 34 75 to 99 both inclusive

Observe whether any of them here contabescent anthers & relative dwarfness.─

In lot 22 to 33 Keep no 27 → (Look at pollen for shrivelled grains & mark with white tape one other short-styled (not 25) no 27 & no 30 & one other long-styled

In lot 75 to 99 try 75 & one other mid-styled not 77 & long-styled 79 & one other not 78.─

Cut down all others after looking a little at contabescent anthers

These must, however, flower together.─

[B87v]

Height of Plant July 8 1866

July 8

No. 6 25 /1/2 inches

No 10 41 inches

 

August 4th

29 inches ─ 2 ft + 5 inches

47 inches = 3 ft + 11 inches} perhaps will grow little taller

 

Tallest plant of 2 in Potato field, same parentage as three 6 & 10.─ 28 inches

Tallest plant of tallest Homomorphic which will do as standard, perhaps rather too high a standard.─ is ─ 5 ft 9 inches = 69 inches

Now Aug 4th is 6 ft + 5 inches. ─ (77 inches)


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

File last updated 2 February, 2023