Hildebrand's paper is unsuitable for the Natural History Review.
My dear Sir
I have been reading D
The subject is a very curious one.— I think Schacht in his Lehrbuch (ii. 373) points out that some months elapse in the Hazel (Corylus) between the application of the pollen & formation of the ovules, & this may be likely to obtain in other Corylaceae some of which are slow in their reproduction work. I must refer to his book when I return to the Herbarium in the morning.
I do not see that you need be so fearful about yr. Catasetum.
very sincerely yours | Dan
Schacht says, l.c.
``In vielen F¨allen wird der obere Theil des Pollenschlauches, wenn das untere Ende sein Ziel erreicht hat, nicht mehr ern¨ahrt, er vertrocknet alsdann mit der Narbe; man findet in solchem Falle wohl in der Fruchtknotenh¨ohle oder im Staubwegcanal die Schl¨auche, aber man vermisst den Zusammenhang derselben mit dem Pollenkorn, dem sie vormals entsprungen sind, wodurch sich Rob. Brown t¨auschen liess, indem er die Pollen-schl¨auche der Orchideen f¨ur Zellen des leitenden Gewebes erkl¨arte. Dies gilt namentlich f¨ur diejenigen Pflanzen, bei welchen die Best¨aubung & die Befruchtung der Zeit nach weit auseinander fallen, z.B. f¨ur die Haselnuss, Hainbuche & Erle, die im ersten Fruhjahr (die Haselnuss im Februar) best¨aubt werden, zu einer Zeit, wo die beiden Samenknospen noch nicht vorhanden sind und erst im Sommer (die Haselnuss gegen Ende des Juni) zur Befruchtung kommen—''
If Hildebrand be going, as he says, to write about this in Bot. Zeit. I really doubt the propriety of having this paper printed in England. Nothing
is made clear as to specific action of pollen-tubes &c in causing swelling of
- f1 4247.f1CD had sent Oliver a manuscript paper on orchid pollination, by Friedrich Hildebrand, for possible publication in the Natural History Review, of which Oliver was an editor (see letter to Daniel Oliver, 18 July ).
- f2 4247.f2Joseph Dalton Hooker, Oliver's colleague at the Royal Botanic Gardens, Kew, was also an editor of the Natural History Review.
- f3 4247.f3Schacht 1856--9, 2: 373. See n. 7, below.
- f4 4247.f4Oliver was an assistant in the herbarium and librarian at the Royal Botanic Gardens, Kew (R. Desmond 1994, List of the Linnean Society of London 1863).
- f5 4247.f5See letter from Friedrich Hildebrand, 16 July 1863 and nn. 5 and 6, and letter to Daniel Oliver, 18 July .
- f6 4247.f6See letter to Daniel Oliver, 18 July  and n. 10. Charles Victor Naudin was a leading authority on the Cucurbitaceae (the gourd family); CD had already consulted him regarding the crossing of varieties of melon (see letter to C. V. Naudin, 7 February 1863). See also letter from J. D. Hooker, 24 January 1863 and nn. 1 and 3.
- f7 4247.f7l. c.: `loco citato in the place cited' (Chambers). Oliver refers to Schacht 1856--9, 2: 373. The passage translates:
In many cases the upper part of the pollen tube ceases to be nourished when the lower end has reached its goal, whereupon it dries up with the stigma. In such cases one does indeed find the tubes in the ovarial cavity or in the stylar canal, but their connection with the pollen grain, from which they originated, is missing. Rob. Brown was misled by this as he declared the orchids' pollen tubes to be cells from the conducting tissue. This is particularly the case for those plants whose pollination and fertilization is far apart in time, such as hazel, hornbeam, and alder, which are pollinated early in the spring (February in the case of hazel), that is at a time when the two ovules are not yet present, and fertilised only in the summer (hazel at the end of June).
- f8 4247.f8Robert Brown.
- f9 4247.f9See letter to Daniel Oliver, 18 July  and n. 4.
- f10 4247.f10The reference is apparently to John Smith, curator of the Royal Botanic Gardens, Kew (R. Desmond 1994).