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LEMNA*. 
Lin nean Class and Order. JWonce'cia f, Dia'ndria*. 
Natural Order. Pisti ace/e, Richard. — Lintll. Syn. p. 251.; 
Introd. to Nat. Syst. of Pot. p. 291. — Mack. FI. Hibern. p. 268. — 
Hook. Brit. FI. (4th ed.) p. 423. — Lemnace.e, Dec. and Duby. in 
Bot. Gal. p.532 — .Macr. Man. Brit. Bot. p. 277. — Aroide f, sect. 
3. Pistiacea; Rich, by Macgilliv. pp. 388 & 389. — Hook. FI. 
Scot. pt. it. p. 191. — Naiades, Juss. Gen. PI. p. 18. — Sm. Gram, 
of Bot. p. 66. — Fluviales, Loud. Hort. Brit. p. 541 . — Juncales ; 
sect. AcorintE, or Aroidea; type, Lemnacea : Burn. Outl. of 
Bot. v. i. pp. 404, 408, & 411. — Miscellanea, Linn. 
Gen. Char. Spatha (see figs. 5 to 8.) thin, membranous, in- 
flated, containing one sterile and one fertile flower , each destitute 
of both calyx and corolla. Sterile Flower of 1 or 2 stamens only. 
Filaments thread-shaped, longer than the spatha. Anthers of 
2 globular distinct lobes, splitting at the top. Fertile Flower 
(fig. 12.) a pistil only. Germen egg-shaped. Style cylindrical, 
short. Stigma simple, blunt. Utricle (fig. 14.) indebiscent, of 
1 cell, with 1 or more seeds. Seeds erect or horizontal. Fronds 
lenticular, without distinct stem or leaves ; and producing the 
flowers from a marginal fissure (see fig. 4). 
The naked flowers , inclosed in a membranous, inflated spatha, 
included in a marginal fissure of the lenticular floating frond, will 
distinguish this from other genera in the same class and order. 
Four species British. 
LEMNA MINOR. Lesser Duck-weed. Common Duck-meat. 
Greeds. 
Spec. Char. Fronds opaque, nearly egg-shaped, flattish above 
and beneath. Roots solitary. 
Engl. Bot. t. 1095. — Hook. FI. Lond. t. 120. — FI. Dan. t. 1087. — Linn. Sp. PI. 
p. 1376. — Huds. FI. Angl. (2nd ed.) p. 399, a. — Wind. Sp. PI. v. iv. pt. I. p. 194. — 
Sm. FI. Brit. v. iii. p. 957. ; Engl. FI. v. i. p. 32. — With. (7th edit.) v. ii. p. 49. — 
Gray’s Nat. Arr. v. ii. p. 729. — Lindl. Syn. p. 252. — Hook. Brit. FI. p 12. — Macr. 
Man. Brit. Bot. p. 277. — Liglitf. FI. Scot. v. ii. p. 537. — Sibth. FI. Oxon. p. 14. — 
Abbot’s FI. Bedf. p. 198. — Thomps. PI. of Berwick, p. 91. — Davies’ Welsh Bot. 
p. 83. — Purt. Midi. FI. v. ii. p. 437. — Relh. FI. Cant. (3rd ed.) p. 374. — Hook. FI. 
Scot. p. 11. — Grev. FI. Edin. p. 6. — FI. Devon, pp. 4 3c 114.— Johnst. FI. of Benv. 
v. i. p. 9. — Winch’s FI. of Northumb. & Durh. p. 2. — Walker’s FI. of Oxf. p. 7. — 
Burn. Outl. of Bot. v. i. p. 412. — Loud. Mag. Nat. Hist v. i. p. 290. f. 155. — Bab. 
FI. Bath. p. 60. ; Prim. FI. Sam. p. 99. — Murr. North. FI. p. 20. — Dick. FI. Abred. 
p. 20. — Irv. Lond. FI. p. 84. — Luxf. Reig. FI. p. 3. — Cow. FI. Guide, p. 36.— 
Baines’ FI. of Yorksli. p. 98. — Leight. FI. of Shropsh. p. 14. — Mack. Catal. of l’l. 
Fig. 1 . Plant natural size. — Figs. 2 & 3. Proliferous and Gemmiferous Plants. — 
.Fig. 4. Flowering Plants. — Fig. 5. Unruptured Spatha, containing the flowers. — ■ 
Fig. 6. The same Flowers, more advanced. — Fig. 7. Flowers of which the spatha 
has burst. — Fig. 8. Spatha opened artificially. — Fig. 9. Sterile and Fertile Flower 
with the spatha removed. — Fig. 10. Anther whose cells have lost their pollen. — 
Fig. 11. Two grains of Pollen. — Fig. 12. A separate Fertile Flower. — Fig. 13. 
Ovule. — Fig. 1,4. Utricle. — Fig. 15. Calyptra-like extremity of a Root. — All more 
or less magnified. — Figs. 5, 6, 8, 10, & 14, from sketches by the Rev. Mr. Sandvs, 
the rest from SirW. J. Hooker’s Flora Londinensis. 
■* Lemma of the Greeks, it is said from Lepis, Gr. a scale, 
-f- See fol. 83, n. -t. 4 See fol. 50, n. f. 
