Diospyros virginiana In respect to the power of making heartwood, the persimmon rarely develops any heartwood until it is nearly one hundred years old. This heartwood is extremely close-grained and almost black, resembling ebony (of which it is a true variety). It is a common misconception persimmon fruit needs frost to ripen and soften, called bletting. Some, such as the early-ripening varieties "pieper" and "NC21"(also known as "supersweet"), easily lose astringency and become completely free of it when slightly soft at the touch—these are then very sweet, even in the British climate. On the other hand, some varieties (like the very large
Diospyros revaughanii the island's (now extinct) species of giant tortoise - and possible also by the dodo - which dispersed the seeds. The absence of these natural seed dispersers could be the reason for the poor seed germination in habitat today. This species is one of eleven surviving species of ebony tree which naturally occur on Mauritius - all of them endemic. Several additional species are now extinct. Diospyros revaughanii Diospyros revaughanii is a rare species of tree in the family Ebenaceae (ebony). The tree is one of several species of ebony tree which are endemic to the island of Mauritius, in