Recently I was kindly sent some extra Torreya seeds collected from trees labelled Torreya nucifera in the North island by a friend. Initially I was very doubtful of the identification, as the size of the seeds was vastly different to the other Torreya nucifera seeds I have received.
However the Gymnosperm Database in its description for Torreya nucifera has this enigmatic paragraph [1]:
Ohwi (1965) recognizes a number of varieties, which are not mentioned by Farjon (2010). Var. radicans is shrubby, native to the Honshu mountains. Var. macrosperma has a large seed 35-40 mm long, and is found only in the Mie and Shiga prefectures on Honshu. Var. igaensis has shorter (10-18 mm long), abruptly spinescent leaves, with a short (20 mm) seed. It is rare, found only in Iga Prefecture on Honshu.
The $2 coin has a diameter of 26.5mm, so perhaps the seeds are from Torreya nucifera var igaensis. The seeds from Austria look to be about 35mm long which matches Torreya nucifera var macrosperma.
Since we’re selecting for larger seeds, there may not appear to be any benefit to selecting this variety with smaller seeds. However it’s always worth growing out extra genetics if you have the space, as it’s possible that the smaller seed size is offset with vigour, precociousness or productiveness.
Hopefully we’ll be able to plant out a trial row of Torreya within the next 1-2 years and begin the next phase of our Torreya project.
References