Gymnosperm subclass data (Query)

[Jim Beach]

Would anyone be able to tell me which subclasses these families belong to,
or which published reference works would have the information?


 Barbeyaceae
 Cephalotaxaceae
 Cupressaceae
 Cycadaceae
 Ephedraceae
 Geissolomataceae
 Ginkgoaceae
 Gnetaceae
 Pinaceae
 Podocarpaceae
 Stangeriaceae
 Taxaceae
 Taxodiaceae
 Welwitschiaceae
 Zamiaceae


Many thanks for any pointers or info.


Jim Beach
Harvard University Herbaria
22 Divinity Ave
Cambridge, MA 02138

beach at huh.harvard.edu