His results with pure gum on Drosera spathulata entirely support CD's opinion. Other observations on insectivorous plants.
My results so far with pure gum quite support your opinion.
Another drop was placed on a leaf of D rotundifolia? 2.13. P.M.
I must try the old gum again. I have not burnt it yet. Besides Im not sure if we used it (the new) in equally strong solution. I intend still trying it.
We have another Drosera I dont know the species,—(I understand Australian) with narrow linear leaves Its rate of incurving some days ago over a fly was as follows
I quite look to working up one or two spinous Floras
I think of, as one, the Flora (Florula!) of Aden upon wh.
The various sorts of spinosity ought to be separately tabulated,—whether true
spines,—epidermal (prickles) & leaf
Apropos of Drosera see a footnote in D
I put a bit of paper in daubed with old gum,— I did not perceive animal odour on burning a piece.
Very faithfully yours | Dan
I doubt if we get good seed this autumn from over 3 or 4 of the isosceles beds!
- f1 2927.f1CD had suggested that the gum Oliver used in his first experiments on Drosera was perhaps contaminated with nitrogenous matter. See letters to Daniel Oliver, 21 [September 1860] and [22--3 September 1860].
- f2 2927.f2See letter to Daniel Oliver, 24 [September 1860].
- f3 2927.f3Thomas Anderson was working at the Royal Botanic Gardens, Kew, on the taxonomy of the flowering plants found in Aden (Anderson 1860). In 1861 he assumed the directorship of the Calcutta Botanic Gardens.
- f4 2927.f4Alire Raffeneau-Delile described the Egyptian plants collected by members of the French Commission d'Egypt (Raffeneau-Delile  and ).
- f5 2927.f5Edward Frederick Kelaart published a flora of Gibraltar in 1846 (Kelaart 1846).
- f6 2927.f6Giles Munby lived in Algeria and published a flora of the native plants of the country in 1859 (Munby 1859).
- f7 2927.f7Oliver refers to Joseph Dalton Hooker, who had read a paper on the `Outline of the distribution of Arctic plants' at a meeting of the Linnean Society of London on 21 June 1860. The paper was published in 1862 (Hooker 1862a).
- f8 2927.f8Hooker 1855--60.
- f9 2927.f9Alvan Wentworth Chapman was the author of a flora of the southern states of America (Chapman 1860).
- f10 2927.f10Oliver published a study of the Aurantiaceae in 1861 (Oliver 1861).
- f11 2927.f11Bromfield 1856.
- f12 2927.f12See letter to Daniel Oliver, 15 [September 1860].