Gives CD an instance of facts that can be read either way as to whether a plant (Veronica humifusa) is a species or a variety.
Gives CD an instance of facts that can be read either way as to whether a plant (Veronica humifusa) is a species or a variety.
Cover containing some seeds mentioned in the letter to H. C. Watson, 28 May [1864], f.2 (S 4512).
Notes by HCW on the Origin dealing especially with divergence and convergence. Believes there is some natural tendency to converge into groups in opposition to divergence generated by natural selection.
Returns reviews of Origin.
F. J. Pictet [Arch. Sci. Phys. & Nat. n.s. 7 (1860): 231–55] goes further than he himself realises.
Naturalists will resist CD’s views until faith in certain "impassable" barriers between existent species is shaken.
Gives CD an instance of convergence.
HCW thanks GG for responding so promptly to CD’s application for assistance.
Wonders whether natural selection can operate to the extent CD contends.
Comments on the travels of JDH.
Genera plantarum a most worthy undertaking.
Criticisms of the Darwin–Hooker understanding of HCW’s views of convergence.
Regrets he cannot assist the fulfilment of CD’s request for a specimen of the orchid Corallorhiza.
Asks whether one of Balfour’s students could obtain specimens of Corallorhiza from Ravelrig bog outside Edinburgh for CD.
Distribution of varieties and subspecies.
George Maw’s review of the Origin [Zoologist 19 (1861): 7577–611].
The Primula experiments of J. Sidebotham; HCW’s distrust of the results [see J. Sidebotham, "Specific identity of the cowslip and the primrose", Phytologist 3 (1849): 703–5].
Taeas [?] allied to L. hyssopifolia. [Cover containing packets of seed specimens.] Mentioned in the letter to H. C. Watson, 28 May [1864], f.2 (fS 4512).
HCW’s criticisms of CD’s theory.