CXXX. AROIDER. 389 
cuneate connective, dilated above into a convex, glandular, 
2-porous disk, opening through a pore in the summit of the 
disk. Carpels many, crowded, free, with 3 parietal placentas, 
incompletely 3-celled; ovules few ; style short ; stigma convex, 
glandular. Berry 1-celled, few-seeded— Kunth, Enum. ii. p. 
57; Bot. Mag. t. 832. 
Marsh or water plants, with thick rhizomes. Leaves radical, on long 
petioles, cordate-hastate, nerved. Spathe large, creamy-white, sweet- 
scented.—R. africana, also called Calla Aithiopica and the “Lily of the 
Nile,” is a common ditch plant throughout the colony ; and another species, 
with spotted leaves, has recently been found at Natal. 
2. STYLOCHITON, Schott. 
Spathe short; tubular at the base. Spadix included, inter- 
ruptedly clothed with stamens and pistils. Male: Perianth 
urceolate ; filaments free, filiform ; anthers 2-celled, bursting 
longitudinally ; ovary rudimentary. Female: Ovary enclosed 
in a cup-shaped perianth ; 2—4-celled ; style exserted ; stigma 
hemispherical ; ovules 2 in each cell.—WSchott, Prod. Syst. 
Aroid. p. 344. Gueinzia, Sonder. 
Stemless herbs, with hastate, petioled, radical leaves.—1 species, from 
Natal. 
3. PISTIA, Linn. 
Spathe tubular at base, connate with the spadix ;- limb 
spreading, furnished with a process, involucrating the spadix 
above. Spadix interruptedly androgynous; female at base, 
male at the free apex. Anthers 3-8, adnate to the thickened 
apex of the spadix, subglobose, opening by a transverse fur- 
row. Ovary 1, obliquely placed on the adnate base of the 
spathe, l-celled ; ovules numerous, from a subbasal placenta ; 
style terminal, thick; stigma cup-shaped. Berry few- or 
many-seeded.—Kunth, 1. c. p. 7. 
Floating plants, with long, fibrous roots. Leaves several, sessile, ex- 
panding like a rose, entire, nerved. Spadices axillary, solitary, on a very 
a amid stratiotes, or an allied species, is found in still waters at 
atal. 
4. LEMNA, Linn. 
Spathe androgynous, delicately membranous, sub-bivalve, in 
the marginal fissure of a lenticular or oblong frond; the males 
reduced to a stamen, the female to a pistil. Stamen hypogy- 
nous, exserted ; filaments filiform ; anthers 2-celled, didymous, 
the cells separate, globose, opening across. Ovary sessile, 1- 
celled; ovules 1-4; style short; stigma depressed. Utricle 
membranous, 1-4-seeded.— Endl. Gen. n. 1668 ; HE. Bot. t. 1095. 
Small floating plants, covering the surface of stagnant water, and known 
