Charophytes (Stoneworts)

The charophyte collection includes important historic specimens from around the world and is rich in type material.   

Charophyte expert Nick Stewart is in the process of donating his extensive collections to the Museum. We are delighted to be able to add these important voucher specimens into the collection, where they will complement our existing historic material and be made available for study by charophyte experts around the world.


  • dried/pressed herbarium specimens
  • microscope slides
  • liquid-preserved collections, including oospore samples

Current projects


The Charophytes, or stoneworts, are among the largest and most structurally complex of the green algae. The main branches have whorls of short lateral branchlets at intervals, giving them a superficial resemblance to the horsetails (Equisetum).