RECORD: Darwin, C. R. n.d. Table 31 / Diameter of Pollen-grains from up to 2 or 3 forms. CUL-DAR111.B34. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed and edited by John van Wyhe 2.2026. 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-DAR111 contains notes on illegitimate progeny of dimorphic and trimorphic plants for Darwin's book Forms of flowers(1877).
[B34]
Table 31
Diameter of Pollen — grains from up to 2 or 3 forms of the same history of the species
Diameter of pollen. Grains
gra
From the long short-style form. From the long-styled form
(Dimorphic Species.)
Primula veris (relative length of pisitl not given) 10-11/ 7000 to 7/7000 or 100 to 67
——— sinensis ------------------------ 100 to 57
Hottonia palustris (pistil more than twice as long) self 100 to 64 — 61
Linum grandiflorum — pollen grains equal [illeg] — pistils about ½ length stamens of equal length
— perenne — — variable no central difference in diameter — pistil twice as long
Stamens of short-styled many twice as long
Pulmonaria officinalis pistils & stamens twice as long 2 up to 7 or as 100 to 78
Polygonum fagopyrum — 100 to 82
(13 in row)
Ægiphila elata pistil 2 ½ as long ————————— (dried) 100 to 62
Menyanthes trifoliata — pistil 3 to 2
Limnanthemum Indicum — nearly thrice as long — in short-styled anthers
Twice as long — but pollen — grains do not differ in size !!
Villarsia — pistil 3 to 2 100 to 67 100 to 75
Sethia acuminata nearly twice as long 2 100 to 83
Erythroxylum — do. xx 2 100 to 93
Cordia — pistil 3 to 2 — stigma larger. — pollen grains equal.
Forsythia suspensa — pistil 100 to 38 x 100 to 94
Mitchella repens — gr. Of short-styled only a little larger
Borreria pistil thrice as long 100 to 92
Faramea — twice as long 2 XX 100 to 67
Suteria (no great difference in length of pistil X — (F. Müller)- 100 to 75
Houstonia anthers of short-styled larger — 100 to 72
Oldenlandia pistil larger by ¼ of own length (good measurements) 100 to 78
Hedyotis — pistil 100 to 39 length — 100 to 88
Coccocypselum — [illeg] twice as long Cinchona X F Muller no difference in p. grains
Lipostoma pistil 100 to 36 X 100 to 80
Cinchona — 100 to 30 X 100 to 91
F minor species (extra differ in pollen of matter of the pollen –grains for all 3 from, or [pencil entry remaining illeg]
2b Lythrum salicaria — Long-styled from H. Müller 100 to 86
(try in colour[?])
Mid-styled do 100 to 63
Short-styled do 100 to 73
(1) (Table of all pollen-grains p. 145) ed[illeg] 100 to 60
Mid-styled less masculine in nature p. 161
(2) Nesæa — extreme difference 100 to 65
The extreme difference in diameter of the pollen-grains for the 3 forms in [illeg] given, or only from 2 sets of anthers of one form what si the case is o[illeg].
3 Oxalis valdiviana extreme differ 100 to 71
4 — regnelli — do 100 to 78
5 — speciosa — do 100 to 72 (over)
[B34v]
6 Oxalis rosea long-styled Hildebrand 9 to 7.5 or as 100 to 83
7 — compressa short-styled 100 to 83
— n[illeg] dimorphia long-styled rosea —
8 Pontederia— short-styled — 100 to 87
9 — mid-styled of other species 100 to 86
9 [+] 26 [=] 35 — 5 [exertion]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 14 February, 2026