554 



M A RSILEACE/E. 



• Americana?. Radices simplices. Labi corporis (capsular 

 calyptratim dchisccntis) 3, pyriformes. Massce (capsulae se- 

 eondariae pedicellatse) 6.9, globosae, subcomprcssae, margine 

 pilis* glochidiatis instructae. 



Asiatics. (Rhizosperma. Meyen. op. cit. p. 523) Ra- 

 dices partim vcl omnino plumosae. Lobi corporis (capsulae 

 calyptratim dehiscentis) 9, angulati, (3 superiorcs majores, 6 

 inferiores.) Massce (capsulae secundaria? pedicellatae) 2-3, extus 

 convex*, intus concavae ct processubus radicelliformibus 3-4 

 instructae. 



Superficies in/era immersa glabra. Ovula basi processibus 

 paraphysi/ormibus stipata. Capsulae rubro plus minus tincta, 

 parietibus simplicibus ; inferior (paris difformis) oblongo-ovata, 

 superior subglobosa, superficie rugosa. Sacci lutei tegumen- 

 tum nigro-sanguineum. 



Habitus Jungermannice. 



Afiinitates incertae. Analogiae cum Gymnospermis phane- 

 rogamicis ct Lemnaceis. 



A. pinnata, circumscriptione triangulari-pinnata, foliis 

 superioribus papulosis, radicibus longitudinaliter plumosis.f 

 A. pinnata, R. Br. Prod. p. 23. 



Salvinia itnbricata, Roxb. Crypt. PL Cal. Jour. Nat. Hist. 

 IV. p. 470. 



A minute floating plant with the habit of Jungermannia. Stem 

 so branched, that the general outline of the whole plant becomes 

 triangular. Roots solitary, arising from the stem at the origin of 

 each branch, plumose throughout their whole length, tipped by a 

 cah/ptra, and surrounded at the base by a short sheath, which may be 

 mistaken for one of the circumcised capsules. 



* The situation and structure of these hairs require I think further 

 examination. As regards the first it appears to me, that whether scat- 

 tered over the whole surface, or only along the margin, they would be 

 visible while contained in the secondary capsule, yet neither Martius nor 

 Meyen represent them as being so. And as regards the second, the 

 hairs of Azolla pinnata do not appear to me organically cellular. 



t Char. ex. immort. Prodr. 



