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]


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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 14 February, 2026