From William Saunders 22 November 1877
Canada | London Ontario
Novr 22/77
Chas Darwin Esq
Dear Sir
I send you by todays mail a package of Plants which I trust will be of some interest to you as illustrating the effects of Hybridization. The package contains six plants—2 of Doolittle Black Cap—2 of Philadelphia and 2 Hybrids marked 70 and 72. The Doolittle Blk Cap is an improved variety of the American Black Raspberry Rubus occidentalis which originated in New York and propagates itself by rooting from the tips of the wood of the current year. The Philadelphia is a chance seedling of Rubus strigosus1 found wild in the county of Philadelphia Pa and propagates itself by suckers from the root. The fruit of the former is black, that of the latter red
In 1870 I operated on the flowers of the Doolittle Blk Cap with pollen from the Philadelphia and succeeded in ripening a number of seeds of this cross from which I obtained the following season 35 plants. As one object I had in view was the raising of hardy varieties I gave these young seedlings no protection in winter, hence six died from exposure. The 29 which survived were planted out on my farm and all have fruited. In every one there were plain evidences of intermixture in foliage and fruit, but all rooted at the tip and in three or four instances I have found a sucker thrown up from the roots as well at distances varying from 3 or 4 to 12 inches from the crown. As my primary object was the obtaining of valuable fruits I rejected all that were not promising in this respect and those I send you nos 70 and 72 are among the best. The fruit is intermediate both in color and flavor between that of the two parents, in fact when a berry of the Doolittle and Philadelphia is mixed together and compared with the Hybrids the taste is so identical that it is difficult to distinguish the one from the other. The berry of the hybrids may be called a purple cap; the stool which it sits on is intermediate in form between the Doolittle and Philadelphia, you will observe also that there is a difference in the character of the roots
These new fruits will I believe prove valuable being very hardy and wonderfully prolific. The only difficulty in the way of their general introduction is that they are somewhat difficult to propagate—they do not root readily from the tips and sucker very rarely. A friend of mine who is trying to grow them for me has partly got over this difficulty by burying the new wood in the fall an inch or two below the surface when he finds the following spring that each bud sends up a small fruiting branch and at the base of each of these a cluster of roots is formed
I send you also some reports of the commissioner of agriculture for Ontario for 1872 and 1873 in which you will find further details in regard to this matter on the pages where you will find leaves turned down. You may possibly find other details which will interest you in the Report for 1872 in my paper “Experiments in Hybridizing”2
From our mutual friend the late B. D. Walsh of Illinois and also from C. V. Riley of Missouri I have heard of your kind courtesy which may be given as one reason why I have ventured thus to trespass on your time which I know must be extremely valuable
Yours very respectfully | Wm Saunders
Footnotes
Bibliography
Saunders, William. 1872. Experiments in hybridizing. Annual report of the Commissioner of Agriculture and Public Works for the Province of Ontario, on Agriculture and Arts (1872). [Also published in Report of the Fruit Growers’ Association of the Province of Ontario (1872): 48–59.]
Summary
Sends plant specimens of a hybrid he has raised by crossing two species of Rubus. Describes procedure by which he obtained them. Cites his paper on hybridisation.
Letter details
- Letter no.
- DCP-LETT-11248
- From
- William Saunders
- To
- Charles Robert Darwin
- Sent from
- London, Ontario
- Source of text
- DAR 177: 39
- Physical description
- ALS 4pp
Please cite as
Darwin Correspondence Project, “Letter no. 11248,” accessed on 24 April 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-11248.xml