RECORD: Darwin, C. R. 1880.01.03-05. Abronia umbellata. CUL-DAR209.6.3. 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 volume CUL-DAR209.6 contains materials for Darwin's book Movement in plants (1880).
Notes for Movement in plants. Text F1325. Abronia umbellata or Pink Sand Verbena is a small flowering annual plant native to western North America. It was first named and described by Lamarck in 1793.
[3]
Jan 3d. 1880 Abronia umbellata—
Skin of true seed very thin delicate & very easily ruptured & removed from seeds with radicles 2 or 3 1/10th protruded.— But outer fruit, tough— at these age the rudiment of 2d cot just visible— The developed Cot folded over farinaceous matter & upturned (as I have said) relative to Hypocotyl & radical. [sketch] C. H. R
I can see a mere trace of swelling or Knob, very doubtful at supposed junction of Hypocotyl & radicle where abruptly bent & on inside— The bending of Hypocotyl when it breaks through ground hence must be due to position of part within seed (?) (Permanganate of potash showed nothing.)
Jan 5th The supposed Knob supposed to be commencement of heel was just where Heel is developed & forms a grt, wedge [extremity] to seed-coats, & between seed-coats which with arched hypocotyl. burst the tough fruit─
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 14 January, 2023