692 ARACE^E LEMNACK.K, 



Schott. (Pothos coriaceus, Grab, ; Hook. exot. fl. t. 110.) 2|. Brazil. 

 — J. Harrisii, Schott. (Pothos Harrisii, Grab. ; Hook. exot. fl. t. 111.) 

 %. Brazil. — A. gracile, Lindl. ; B. Reg. 19, t. 1635, (Pothos gracilis, 

 Rudge, not Roxb.) % Guiana. — A. pentaphylluni, Schott. (Pothos 

 pentaphyllus, Willd. ; B. M. 34, t. 1375.) % S. America.— 5'/?a/Ao. 

 phyllum lanccrfolium, Schott, (Dracontium lancesefolium, Jacq.)'2|.. Cara- 

 cas. — Symplocarpus foetidus, Nutt. ; B. M. 60, t. 3224. (Pothos foe- 

 tidus. Ait.; B. M. 22, t. 836.) '^. N. America. — Acorus terrestris, 

 Rumph. 5, t. 72, f. 1. % Moluccas. Cochin China. — Ariopsis peltata, 

 Nimmo. % Bombay. 



ORDER CCLII.— LEMNACEJ5, Schleiden, 



Comp. gen. and sp. in Mag. Nat. Hist. vol. 6, p. 259. 

 Endl. gen. pi. 1, p. 232. 



THE DUCK- WEED TRIBE. 



Minute floating plants, 5 inhabiting Europe, America, and Van Die- 

 man's Land, and 5 discovered in India, viz. : — 



Lemna, L. (Spreng. syst. 2, p. 28, No. 125; — R. Br. pr. I, p. 345 ; — 

 Endl. gen. pi. \,p. 232.) Duck-weed. 

 1. orbiculata, Roxb. {fl. ind. 3, p. 565.) © Bengal. (Calcutta, Seram- 

 pore,) &c. Fl. lateral, with a spathe, minute, R. and C. S. 

 ? 2. cruciata, Roxb. (o. c. p. 566.) © Bengal, under the surface of the 

 water in tanks, in most extensive interwoven masses. Has not been 

 found here, and may perhaps belong to the next genus. 

 3. obcordata, Hb. Buch. © Goruckpore. 

 Grantia, GrifF. (MSS.* 1838. — Woljia, Horkel. Miscel. ? Schleiden comp. 

 gen. and sp. Lemnacese, in Mag. Nat. Hist. vol. 6, p. 259. ?) Named 

 by Mr. W. Griffith, in honour of J. W. Grant, Esq., of the Bengal 

 Civil Service, one of the best microscopical observers of the present 

 day. 

 l.rnicroscopica, GrifF. MSS. Calcutta. Serampore. Fl. most minute, 

 terminal, naked, R. and C. S. 

 }2.globosa, GrifF. MSS. (Lemna globosa, Roxb. fl. ind. 3, p. 565; — J. 

 Grah. Cat. B. pi. p. 252.) © Bengal. Serampore. Bombay. Fl. R. and 

 C. S. 



• Flos monandru.'i, terminalis. Spatha nulla. Anthera unilociilaiis. I'luntn minima, 

 Clavijormis inter Phaneroyumms simplici.isima. (Griffith. J 



