135 
II. FERN ALLIES. 
AzoUa, Lam, 
A. caroliniana, Willd. Tropical and sub- tropica 
America, 
A. pinnata, R. Br. Australia. 
Equisetum, Z. 
E. arvense, L. North temperate and arctic regions. 
E.fluviatile^ Sm, See limosum. 
E. giganteum, L. Tropical America. 
E. hyemale, L, North temperate and arctic regions. 
E. limosum, L. North temperate and arctic regions. 
E. maximum, Lam, North temperate regions. 
E. palustre, Z. North temperate and arctic regions. 
E. pratense, EhrJi. North temperate and arctic regions. 
E. robustum, A, Br. North America. 
E. scirpoides, Michx\ North temperate and arctic regions. 
E. silvaticum, Z. North temperate and arctic regions. 
Z. Telmateia, Ehrh. See maximum. 
E. variegatum, Schleich, North temperate and arctic 
regions. 
Isoetes, Z. 
I. DuriaBi, Bory. Mediterranean region. 
I, lacustris, Z. Europe and North America. 
Var. Morel, Moore, Ireland. 
Lycopodium, Z. 
L. alpinum, Z. Europe. 
L. complanatum, Z. Europe. 
L. clavatum, Z. Europe. 
Z. Hippuris, Desv. See squarrosum. 
