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Quentin Groom
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Oxalis corniculata and its close relatives are some of the most well traveled species. We are trying to understand how this group evolved and how their interaction with human-kind has led to their global distribution.

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A common plant survey of the vice counties of Durham and South Northumberland
Many
people remark on the changes that are occurring in the countryside, the
disappearance of some species and the spread of others. Yet these anecdotes
cannot substitute for hard facts. There are also many suggested causes for all
these changes; a warmer c...

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The latest edition of the Rare and Scarce Plants of South Northumberland is finally finished.

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We should drop the use of the word tetrad or at least learn what the area is!
The word tetrad is used to describe a square area of land with sides of 2km it has an area of 4km 2 . The term tetrad is widely used in biological recording in the UK, but it often misunderstood both in the UK and abroad. Logically it is derived from the an...

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This morning I've been creating distribution maps using cokriging. Veronica persica is a common weed in the UK, but clearly it doesn't grow everywhere. The results nicely pick out the arable farming areas where it is most common.
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