506 Key to the System of 



rhomboid, occasionally indented; conceptacles oblique, 

 from dimidiate- to roundish-ovate, when moistened 

 bursting into two valves ; fruit-masses cylindric-ellipsoid, 

 alternating on an in-growth almost gelatinous and pro- 

 truding stalk, very spreading, each containing numerous 

 caselets with antheroids and besides spore- caselets few 

 in number with a single spore in each. Figure 128. 

 "Nardoo." M. quadrifolia. 



FXXiUXiARXA. 



2124. Fronds stalk-like, coiled during vernation inward. 



Quite dwarf ; fronds imperfect, merely filiform, very slender, 

 gradually pointed ; fruit-masses solitary, hardly stalked, 

 four-celled, valvular-dehiscent, each cell containing as 

 well caselets with numerous antheroids as others with 

 a single spore. P. globulifera. 



XSOETXSS. 



2125. Fronds stalk-like, straight also during vernation. 



Dwarf, always submerged ; tufted, without any offshoots ; 

 fronds imperfect, succulent, erect or some slightly 

 spreading, comparatively short, very thinly filiform, 

 gradually pointed, seldom numerous ; fruit-masses in- 

 serted into the inner base of fronds, provided with trans- 

 verse dissepiments ; caselets with numerous antheroids on 

 the inner fronds, caselets with several spores on the outer 

 fronds. I. Drummondi.. 



LYCOPODINAE. 



FHYZiXiOGSiOSSUM. 



2126. Leaves (or leaf-like organs) several, linear, often about 

 half as long as the stem. 



Very dwarf ; generally of a pale-yellowish hue ; tubers two, 

 one formed annually, small, obversely ellipsoid-clavate, 

 accompanied by one or two or few thickish rootlets ; 

 stem solitary, erect, comparatively thick ; leaf-like organs 

 rather carnulent, gradually somewhat pointed ; spike 

 always one only, cylindric- or ovate-ellipsoid ; bracts 

 appressed, somewhat rigid, roundish, at the base pro- 

 truding, ending in a narrow but blunt apex ; spore- 

 caselets firm, renate - orbicular, vertically dehiscent} 

 spores extremely minute. Figure 131. 



F. Drummondi.. 



