94. LEMNACB^. 369 



2. Arum. Perianti 0. Male fl. of 1 sessile 2-ceUed anther. 

 Fern. fl. placed lower, of 1 pistil. Top of spadix naked. 



1. Ac'oETTS. Sweet Flag. 



1. *A. CaVamus (L.) ; st. with a long leaflike wolongation 

 (or spath) heyond the spadix.— X B. 356. R. x. 429.— St. 5— 

 6 feet high, resembling the 1., swordshaped, flattened. Spadix 

 completely covered hy the flowers, 2 — 3 in. long, lateral. St. 

 andl. sweet-scented when crushed. — In water, rare; except in 

 Norf. and Suff. Between Lisbum and Moira, Co. Down. E. I. 



2. A'Etna: lAnn. Cuckoo-pint. 



1. A. maculdtum (L.) ; I. all radical hastate-sagittate with 

 dejkxed lobes, petiole as long as leaf-limb, spadix clubshaped 

 straight falling short of the spath. — H. B. 1298. R. Tii. 8. — 

 Root tuberous. L. vernal, with branching veins, green or 

 spotted with purple. Spath ventricose below and above, con- 

 stricted in the middle, with inflexed edges when open. Spadix 

 blunt; with ovaries at the base; above them whorls of stamens ; 

 then a few filaments, probably abortive pistils; club naked. 

 Berries scarlet remaining after the rest of theplant has disap- 

 peared; seeds mostly 4 or 3, or rarely 2. — Ekdge-banks and 

 thickets. P. IV. Y. E.S.I. 



2. A. itaVicum (Mill.) ; I. all radical triangular-hastate with 

 divaricate hbes, petiole longer than leaf-limb, spadix clubshaped 

 straight falling short of the widely spread spatii. — R. vii. 11. — 

 X. appearing before the winter, of a dark blue-green, sometimes 

 with yellowish veins, rarely spotted, blunt. Spath ventricose 

 below, opening nearly flat and very broad above, folding down 

 in front when fl. are in perfection so as to close the opening 

 like a flap, ultimately bent or folded double over the spadix. 

 Abortive pistils very long, both above and below the stamens. 

 — Thickets in the Undercliflf, Isle of Wight; and Channel 

 Islands. P. V. VI. E. 



Order XCIV. LEMNACE^. 



Fl. monoecious, 2, in a spath, but without a spadix (rarely 

 found). Perianth 0. Stam. 1 — 2, distinct. Ovary 1-celled. 

 Style short. Stigma simple. Fr. bladdery, not bursting. 

 Seeds with a coriaeeons ribbed testa. — Floating, leaflike, small ; 

 no distinction of st. or leaf. Fl. very minute. 



1. Lemna. Spath membranous, ifmshaped. Fl. ffom lateral 

 clefts of frond. Stam. 1 — 2. Anth. 2-celled, didymoua 



B 5 



