41 



CRYPTOGAMS OR FLOWERLESS PLANTS. 



[No stamens or pistils or true seeds. Fruit — spores contained in spore-cases in the substance 



of the plants.] 

 XCIU. EQUISETACEiE. HORSE-TAIL FAMILY. [Herbs, with jointed stems, 



whorls of scale-like leaves at joints.] 



Equisetum Telmateia .. Great Horse-tail ... April 3 ... W, M. 



,, arvense ... Field ,, ... Mar. 31 ... C. 



„ palustre ... Marsh „ ... June 21 ... C, M, Ba, L. 



