However, doubts have been raised recently, since the increase of the number of beetle families during the Cretaceous does not correlate with the increase of the number of angiosperm species.

Flowers show remarkable variation in form and elaboration, and provide the most trustworthy external characteristics for establishing relationships among angiosperm species.

Approximately one half of angiosperm species are SI, the remainder being self-compatible (SC).

Kauri biomass tends to decrease during such times, as more biomass becomes concentrated in angiosperm species like towai.

They were rediscovered in 1997 and have since been reported to exist in a number of angiosperm species including Arabidopsis thaliana, wheat, rice and tomato, but their role is not yet fully understood.

Monoecy is especially common in conifers, but occurs in only about 7% of angiosperm species.

It is infectious to a number of angiosperm species.

Larvae have been recorded feeding on the dead wood of a variety of angiosperm species.

About 70% of angiosperm species have endosperm cells that are polyploid.

The rapid evolution of diverse angiosperm species 25 million years later eventually became the dominant tree type by the mid-Cretaceous.