Richardia.] AROIDE& (Brown). 39 
Link Handb. i. 267. Zantedeschia athiopica, Spreng. Syst. Veg. 
iil. 765; Engl. Jahrb. iv. 64. 
Coast REGION: Shek ag around Cape Town, Pappe! T 
yger 
Berg, fade 1000 f as ' "Bivens sb ; "ostenhalici River, Gill! ° 
w hater Natal; chy “Wo od, 286! 
A Sah form of this specie spina a branched fla is figured in. the 
Gardeners’ Chronicle 1895, 185, figs. 19,20. A dwarf form about a foot 
high was introduced into 0 uropean eatbcks in 1894 or 1895, where it is known 
under the name of * Little Gem.’ 
Orpver CXLVI. LEMNACEZ. 
(By N. E. Brown.) 
Flowers very minute, seated in a cavity ~ the margin or in the 
upper oie of the frond, consisting of 1-2 stamens accompanied 
by a sile ovary, either n aked or enclosed in a membranous 
spathe to perianth ? ), widah ruptures irregularly as fr stamens 
mature. Stamens exserted from the frond ; filaments filiform ; anthers 
1-2-celled ; cells subglobose, opening by transverse slits or by a slit 
across the top. Ovary narrowed into a style or with a subsessile 
stigma, l-celled ; placenta basal; ovule solitary or Pe in an ovary, 
anatropous, semianatropous, or orthotr ropous. Fruit 1-several- seeded, 
indehiseent or opening aisithearnisee Seeds minute, albuminous 
embryo straight, axile. 
Small or m tient gregarious, floating sala dousiedlog se ce jen 
vate, oblong or linear fronds of cellular tissue, with o 
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cavity or cavities ate ne t the basal end of t — rootless or pro- 
ducing one or more roots rs "the middle of the under surfac 
Pee ae All warm and temperate countries, in still water. "Gamae 2; species 
- Lemna.—Frond with one or more roots. Flowers seated in a cavity at the 
margin of the frond. 
IL, Bose Mis. Frond rootless. Flowers seated in a cavity in the upper surface 
of the frond. 
I, LEMNA, Linn. 
Flowers very — very rarely seen in some of the species, 
seated in a cavity at the of the frond, enclosed in a minute 
membranous stag Stamens 1-2 ; anthers 2-celled ; cells opening 
Fron 8 small or seine: 
on still waters, thin and flat, or flat above and m i 
orbiter elliptic, o oblong, above or ia tery ete se outline en — rier ke ag a 
n cag under surface, floating 
with one or more roots o ising eee 
ee All warm and temperate countries. Species 9. 
