CXLTV. LTCOPODlACEiE. 471 



— Stems rigid, erect, slender, angled, irregxilai'ly-branched. Leaves few and 

 Bcale-like. Capsules in the angles of the scales. 



Oeder CXLV. MAB,SILEACEiE. 



Capsules of 2 kinds, 1 containing a single large spore, and 

 the other numerous minute ones. In some genera both kinds 

 of capsule enclosed in a common, many-celled receptacle. 



Marsh or water plants of very various habit. 



1. MARSILEA, Linn. 



Spores of both kinds contained in the same receptacle, 

 which is placed at or near the base of the long petioles of the 

 4-foliolate fronds. 



1 Cape species, with the fronds of a 4-leaved shamrock. 



2. AZOLLA, Lam. 



Eeceptacles yerj minute, of 2 kinds, hanging from the lower 

 side of the branches of a pinnate frond with minute imbrica- 

 ted leaves. 



1 Cape species ; a minute, pinnately-branched, moss -like, floating water- 

 plant. 



Order CXLVI. EQUISETACE^. 



Spores surrounded by elaters, placed on the under side of 

 stalked, peltate scales, which form cones at the apex of the 

 stems. Stems erect, cylindrical, fluted, jointed, hollow be- 

 tween the joints, which terminate in toothed sheaths. 



Only 1 genus, Eqtdsettim, represented at the Cape by a single species, in 

 which there are no whorls of small branchlets, as is often the case, fi-om the 

 nodes of the main stem, which is erect, copiously and regularly striated, 

 and abounds in silica. 



ADDENDUM. 



America triphtlla, A. DC. in DO. Frod. v. 9, p. 513 

 (Ehretia triphylla, Hoclist. Herh.), a plant gathered in Natal 

 by Krauss, and doubtfully referred by A. De CandoUe to the 

 American genus Amerina, is wholly unknown to me. 



