MONdcoTYLEnoSfs. — AiioiDE^:. Sparganiwii. 1111 



Skc;t. II. PisTiArE.K. TCnh. hi Humh. Nov. Gen. Spadix 2- 



jlowered, in a cilcullale afjatha. Flowers with anthers and 



pistils separate, Capsule or Utricufns. — Floating plants . 



2. LEKI?^A. 



Male and female y?o?<^en' collateral. Sta7nens2. Utrirulus )— 5- 



seeded^. 



1. L. trisulca, fronds thin elliptico-lanceolate caudate at one ex- 

 tremity at the other serrate, roots solitary, p. 10. — Slagnanl 

 ivaters. 



2. L. minor, fronds nearly ovate compressed, roots solitary. p.W, 

 — Stagnant waters. 



3. h.poli/rrhiza, fronds obovato-rotundate compressed, roots nu- 

 merous clustered, p. 11. — Stagnant ruaters. 



4. L. gihha, fronds ol)Ovate nearly plane above hcmisphaerical 

 beneath, roots solitary, p. 11. — Stagnant waters^ rare. 



Sect. III. Typhin.t;. Jii^s. Floivers monoocions, hut surrotmded, 



I jl a perianth. Stam.'d. Ouary \-seeded; ovule pendulous. 



Fruit an achenium. 



3. SPARC iANIUM. 

 Flowers collected into sphaerical, dense heads, which are stami- 



uiferous or pistilliferous. Barren Fl. Perianth of 3 leaves. 



Fertile Fl. Perianth of 3 leaves. Drupe dry, with 1 seed. 



1. S. ramosnm, leaves triangular at the base their sides concave, 

 common flovver-stalk branched, stigma linear, p. 260. — Stag- 

 nant waters. 



2. S. simplex, leaves triang\ilar at the base their sides plane, 

 common flovverstalk sinsple, stigma linear, p. 260. — Still wa- 

 ters. 



3. S. natans, leaves floating plane, common flowcrstalk simple, 

 stigma ovate vei v short, head of sterile flowers mostly solita- 

 ry, p. 2(^0.-— Ditches. 



» The first, and, we believe, only botanist who has ventured to place 

 Lenina and P'lutia next each other is Linnneus ; who could have had a very 

 imperfect knov.'led^e of the latter, and a far from complete acquaintance 

 with the former. Notwithstanding the different manner in which Pm//« and 

 Leinna have been described, it is in these descriptions only that they really 

 disagree, and notin natural athnity. Suppose wliatis ci\\\t.-A per knit h at;;. 10, 

 Part I. to be asput/iti ; and we have a spudij; reduced to a point bearing two 

 naked ^fi owe IS, of which the superior is male and diandrous, the inferior fe- 

 male. Let this account be compared with M, Kunth's character of Piafla 

 in the Nova Genera ei Species Planfnriiin of Baron Humboldt, and it will be 

 found to be absolutely the same, except in the single particular of capsule. 

 Nor can we perceive any other than generic differences hetv/ecn the two 

 genera, as far as it is possible to judge of Phtia from Roxburgh's account of 

 it. We ought to add, that Mr. Brown first rcmarlced to us that Lnmna -v.i-LS 

 a reduced Aru'idea. 



