Hutchinsia - Hornungia petraea
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Species Description
A very rare plant of sun parched spots with little vegetative competition on carboniferous limestone outcrops, scree slopes, old quarries and calcareous dunes etc. First discovered in Britain from Bristol in about 1689 by Richard Kayse, who sent material to Bobart who included in his catalogue dated 24th Feb 1689 and was later published by Ray (1690) "Nasturtiolum montanum annuum tenuissime divisum...brought me [Bobart] by Richard Kayse from S. Vincents Rock near Gorams Chair, in the parish of Henbury, three miles from Bristol". The quote is perplexing as St. Vincent's Rock and Gorams Chair are miles apart but the plant is known to have occurred at both stations.
Useful Links:
Online Atlas of the British and Irish Flora