Richard Knight had two other sons another Richard Knight (1693-1765) and Thomas Knight (1697-1764), the latter being the father of Richard Payne Knight MP (1750-1824) and Thomas Andrew Knight FRS (1759-1838).
The Japanese plum yew was first considered to be a yew when it was partially described by Thomas Andrew Knight in 1839 and as such was named Taxus harringtonii.
Thomas Knight's Pomona Herefordiensis (1811), noted that "trees of the Red-streak can now no longer be propagated; and the fruit, like the trees, is affected by the debilitated old age of the variety, and has in a very considerable degree, survived those qualities to which it was owing its former fame".
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