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From J. D. Hooker [8 July 1855]
Summary
Australian Leguminosae problem: of 900 species not ten are common to southwest and southeast. No migration; hence either creation or variation.
Himalayan thistles: graded intermediates between large and small English species, "shakes species to their foundations". Similarity of CD’s and his views on species.
| Author: | Joseph Dalton Hooker |
| Addressee: | Charles Robert Darwin |
| Date: | [8 July 1855] |
| Classmark: | DAR 104: 192–3 |
| Letter no: | DCP-LETT-1714 |
