AN ENUMERATION OF CULTIVATED PERNS. 281 
on the footstalk, 2-valved, containing numerous obovate recep- 
tacles in two longitudinal series, bearing cellular vesicles of 
Genus 1 61. —Plant with spore-cases, natural size. No. 1. 
two kinds — 1. ( Antlieridangia ), containing numerous small 
spores ; 2. (OopJioridangia), containing a single large spore. 
1. M. quadrifolia, Linn. ; Willd. Sp. PI. 5, p. 538 ; Schk. 
Crypt. 1. 173. — Germany. 
2. M. maeropus, Hook. Ic. PI. t. 909 ; Card. Ferns, t. 63 ; 
Seemann, Journ.Bot. 1, p. 6. (The Aardoo plant of 
Australian explorers.) — Australia. 
