A small projection at the base of a basidiospore near its attachment to the sterigma.

位于担孢子基部连接担孢子梗一种小附属物。

Petals 5, differing slightly in size, imbricate, sometimes unguiculate, free, keel without apical appendages.

花5，寸方面不同稍，覆瓦状，有时具爪，离生，没有顶端附属物脊。

Achene straight, with crested or U-shaped appendix at apex or along dorsiventral edges, usually verrucose, invested by shorter persistent perianth.

瘦直，有具脊或者U形附属物先端或者背腹边缘，通常多疣，被更存花被包围。