Plate II. EQUISETALES 



The surviving genus of this great Paleozoic order is 

 Equisetum, a herbaceous plant growing along creeks and 

 in damp meadows. It is commonly called Horse Tail or 

 Scouring Rush. In Pennsylvanian times tree forms of this 

 order grew. Their stems are called Calamites, their leaves 

 Annularia, or if smaller and more numerous Calamocladus, 

 their fructifications Calamostachys. (See Plates II to V.) 



1. Calamites suckowi Brongniart, from La Salle, x 1/5, U C Coll. 



No. 32000. 



2. Calamostachys solmsi (Weiss) Weiss, from Braidwood, U C Coll. 



No. 32001. 



3. Calamites suckowi Brongniart, from Braidwood, x 2/3 U C Coll. 



No. 32002. 



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