( 6) 



Ordo II. JHarsigliaceae S. -F. Gray Nalar. Arrang. of Brit. plant., 

 II, p. 24, — 1821. — Conceptacula petiolo vel prope petioli basin 

 inserla, bi-multilocularia, bi-quadrivalvia, uniformia, macrosporangia 

 et microsporangia in eodem conceptaculo continentia. — Genus 

 Marsilea Linn. (Gen. plant., p. 526, n. 799, — 1757), non Michelii 

 (Nov. plant, gen., p. o, tab 4, — 1729), comiti Aloysio Ferdinando 

 Marsigli (latin. 3Iarsilio) dicatum, bine Marsiglia nec Marsilia 

 dicendum. 



Subclassis II. Elenthosporangiae Trevis. Carest., loc. 



cit. (Selaginelleae Metten. Fil. hort. Lips., p. 16, — 18o6). 



— Sporangia solitaria, conceptaculis discretis nunquam 



inclusa. Macrosporangia macrosporas plures (usque 80), 



striis tribus notatas, continent; microsporangia micro- 



sporas numerosissimas, stria solitaria vel striis tribus 



notatas, gignunt. 



Ordo III. Isoëtttceae Trevis. Herb. crypt. Trevis. ? \, p. 16, — 1851 

 (Isoëteae Reichenb. Consp. regn. vegel., p. 45, — 1828). — Sporangia 

 basi foliornm in vaginam latam dilatatam immersa. Macrosporangia 

 macrosporas numerosas (40-80) tetraedras, striis tribus notatas, includunt; 

 microsporangia microsporas numerosissimas trigonas, stria solitaria 

 notatas, continent. 



Ordo IV. .«Selagiiiellaceae Roze (in Ballet, de la Soc. bot. de France , 

 XIV, p. 179, — 1867). — Sporangia axillaria, in spicas consociata, bival- 

 via. Macrosporangia numerosiora, transverse debiscentia, macrosporas 

 plerumque quaternas includunt ; microsporangia rariora aut solitaria, in 

 eadem spica obvenientia, microsporas minutissimas continent. Sporae 

 omnes stiis tribus notatae. 



Subregio II. I§o§por.%e Sacbs loc. cit. — Sporae 

 uniformes, sporangiis uniformibus inclusae. 



(Sporae elatcribus binis elasticis circumvolutae. . . Equiselinae. 

 (Sporae elateribus circumvolventibus destitutae . . Filicinae. 



Legio I. Equisetinae Link Enum. plant, hort. berol., II, 

 p. 454, — 1822. 



Classis II. Equisettiles Trevis. Carest., loc. cit. 



Ordo V. Equisetaceae L.-C. Richard in Michaux Flor. bor. Amer., 

 II, p. 281, — 1805. 



