232 



OBDEE, GENUS, AND SPECIES. 



28. OSMUNDA. 



1. Claytoniana, L. 



2. regalis, L. . . . 



29. Ltgodium. 



1. pinna'tifidum, Sw. . 



2. japonicum, Sw. 



30. BOTEYOHIUM. 



1. Lunaria, Sw. . 



2. ternatum, Siv. . 



3. virginianum, Sw. (Gamble) 



4. lanuginosum, Wall. 



LYCOPODIACB^. 



1. Lycopod:um. 



1. Hamiltonii, Spreng. 



2. setaceum, B. Don . 



3. clavatum, L. . 



2. PSILOTUM. 



1. triquetrum, Siv. 



SELAGINBLLACE^. 



1. Selaginblla, 



1. rupestris, Spring. (D.) 



2. plumosa, Baker 



3. yemensis, Spring 



4. caulescens, Spring . 



5. pallidissima, Spiring 



6. chrysocaulos, Spring 



EHIZOCAEPEiE. 



1. AZOLLA. 



1. pinnata, B. Br. 



CHARACE^. 



1. Chaea. 



1. fcBtida, B. Br. . 



2. coronata, Zig. . 



• Habit of growth. 



Caudex erect 

 tt 



Single plants 

 )t 



Single plants 



