Verified Answer :

The 4 divisions of Gymnos:

1- coniferophyte
2- Cycadophyta
3- Ginkgophyta
4- Gnetophyta

Describe
1- Conifers : Pines , firs , redwoods
2- Coniferophyta : seeds , large
3- Cycadophyta : Tropical and subtropical
4- Ginkgophyta : Only living Meso Era survived in China .

I hope that's help !