Plate V. EQUISETALES 



1. Annularia radiata (Brongniart) Sternberg, from Mazon Creek, 



U C Coll. No. 32004. 



2. Annularia sphenophylloides (Zenker) Gutbier, from Mazon 



Creek, U C Coll. No. 32005. 



3. Annularia sphenophylloides (Zenker) Gutbier, from Braidwood, 



U C Coll. No. 32006. 



4. Calamostachys germanica Weiss (The strobilus of Calamocladus 



equisetiformis Schl.), from Braidwood, U C Coll. No. 32007. 



5. Calamostachys magna Lesquereux, from Mazon Creek, x 2/3 



U I Coll. No. P 1284. 



28 



