CXXX. GENEBA OP PEBNS. 



3 PlLU:LABIE.. 



185. PILULARIA, Linnaus, Gen. Plant, ed. 5, 1047. 



Spore-cases (Conceptacles) pedicellate, axillary or extra-axil- 

 lary, solitary, globose, coriaceous, two- four- celled, two- four- 

 valved ; each cell containing bodies of two kinds : (1) aniheridia^ 

 consisting of vescicles filled with many minute granular spores ; 

 (2) oophoridia, occupying the lower part of the cell, each contain- 

 ing a single large spore. 



Submersed aquatic plants, with long creeping filiform rhizomes, 

 producing the filiform leaves (? petioles), singly or in small 

 tufts at intervals. Spore-cases inserted on the rhizome along 

 with the tufts of leaves, or opposite to them. 



Ex.: P. globulifera, Lin. \ P. minuta, Dwrieu. 



4 MABSILE.E. 

 186. MABSILEA, LinncEus, Gen. Plant. 799, (reduct.) 



LEMMA, Jussieu ; ZALUZAITSKIA, NecTcer. 



Spore-cases (Conceptacles) pedicellate, solitary or several 

 together, inserted laterally on the petioles, or axillary on the 

 rhizomes at the base of the petioles, two-valved, containing 

 numerous obovate cell-like receptacles in two longitudinal series, 

 bearing bodies of two kinds: (1) antheridia, consisting of 

 numerous sessile one-celled vescicles, containing small globose 

 spores ; (2) oophoridia, ranged in a single series along the recep- 

 tacles, and consisting of oval pedicellate vescicles containing a 

 single large spore. 



Dwarf herbs, having a creeping rhizome and long-stalked 

 leaves, growing at intervals, either singly or in small tufts, and 

 consisting of about four cuneate-obovate leaflets placed crosswise 

 at the petiole, the fructifications growing either from the rhizome 

 at the axils of the leaves, or from the petiole of the leaf. 



Ex. : M. quadrifolia, Lin. 

 M. macropus, Hook. 

 M. brasiliensis, Martivt. 



M. pubescens, Tenore. 

 M. vestita, Hk. and Or. 

 M. polycarpa, Hk. and ffr. 



