298 Lemnacee. [ Lemna. 
Page 366.—For Lemna Linn. read: 
Root solitary : : : ; ? . I. LEMNA. 
Roots numerous . : : : u ; : . Ia. SPIRODELA. 
1. BEMNA. Linn. 
Frond flat; ovule solitary . : : : oi. L: PAUCKEOSIATA, 
Frond tumid beneath; ovule 52-7 : . 2, L: cipee 
2. Lemna gibba Linn. Sp. Pl. p. 970 (1753); Hegelm. Lemnac. 
p. 145 t. 11-13 (1868). 
Root solitary; root-sheath cylindric, elongate; root-cap 
acute; frond opaque, orbicular or obovoid, tumid beneath; 
stamens 2; ovules 2-7; seeds erect, anatropous. 
ia. SPIRODELA Sciileid. 
As Lemna, but with the daughter short of frond, bearing 
at its base a small lobe which is supposed to be a basal leaf, 
and several roots to each frond.—Sp. 2. 
For Lemna polyrrhiza Linn. read: 
Spirodela polyrrhiza Schleid. in Linn. XIII, p. 392 (1839); 
Hegelm. Lemnac. p. 151 (1868). Lemna polyrrhiza Linn. Sp. Pl 
P- 970 (1753). 
2. WOLFFIA Heckel. 
Frond convex above : : ; = : . W. ARRHIZA. 
Frond flat above . F : ‘ ? : . W. MICROSCOPICA. 
W. microscopica Kurz. in Journ. Linn. Soc. IX, p. 265 (1867); 
Hegelm. Lemnac. p. 127 (1868); Petch in Ann. Perad. IX, p. 347 
(1925). Grantia microcopica Griff. Ic. t. 260-268 (1847-52). 
Pond near the Post Office and ‘‘ well’’ near Ruanvella Dagoba, 
Anuradhapura (Petch). I have seen no specimens, and according to 
the Fl. Brit. Ind. (VI, p. 558) the plant is only known from Griffith’s 
figure of a Bengal specimen. 
Page 368.— 
1. SCIAPHILA Blume. 
Style shorter than the ov. : 
Stam. 6; stigma capitellate; fls. not secund, 
Ts in. ‘diam. 3 ; ; . I. S. ERUBESCENS. 
Stam. 3; stigma penicellate fls. secund, 
4 in. diam. . ‘ : . 2. S. SECUNDIFLORA. 
Style longer than the ov., simple : 
Fls. secund; pedicels up to 3 in.; perianth 
segments 6. : . 2a. S. INORNATA. 
Fls. not secund; pedicels Z-I in; 3 perianth 
segments 8 . : : ; : . 3. 5. JANTHENAL 
Part IV. 
