Hypericum kouytchense × calycinum  

This hybrid was made by Mr D . Walker of North Mymms , Hatfield , Herts ; but as I do not know if it is still in cultivation and have a specimen of only one flower and two pairs of leaves (coll. 18.ix.1976), I have refrained from naming it or describing it in detail. It is intermediate between the parents, having lanceolate to elliptic, apiculate leaves with rather dense but obscure tertiary reticulation beneath;a flower 80 mm in diam.; sepals 10-12 x 6-7 mm,broadly elliptic and rounded-apiculate; petals 40 x 28 mm, intermediate in form with uncinate to obtuse subterminal apiculus; stamens 16-17 mm long, 0.4 x petals, with yellow anthers; and ovary ovoid, 10 x 6 mm, with styles 13 mm (1-3 x ovary), gradually outcurving.