They will test them to make sure they are fully Malus coronaria and not a hybrid variety.

他们将对它们进行检测，以确保它们蔷薇科苹属品种，而不杂交品种。

If a Malus coronaria is crossbred with a commercial apple tree to make a new hybrid, it would take four or five years for that tree to start producing apples.

如将蔷薇科苹属与商业性苹杂交以培育新杂交种，那新杂交种需要四五年才能开始结出苹。

The late blooming tree is a native Michigan apple tree known by the scientific name Malus coronaria.

这种晚熟树一种土生土长密歇根苹树，学名叫做蔷薇科苹属植物。

Malus coronaria is also called sweet crabapple.

蔷薇科苹属也被称为甘棠。

A rose is in the genus Rosa.

玫瑰属于蔷薇属。

We may instance Rubus, Rosa, and Hieracium among plants, several genera of insects, and of Brachiopod shells.

我们可以举出植物中悬钩子属、蔷薇属和仙人掌属、几个昆虫属和腕足类动物壳。