Fronds
rarely exceeding 1 mm in any dimension, solitary or 2 remaining attached, inflated, globose to ovoid, with 1 basal, lateral, funnel-shaped budding pouch; daughter plants soon separating, nerves absent
Roots
0
Flowering
cavity in upper surface of frond
Inflorescence
of 1 female and 1 male flower, without a membraneous sheath
Anther
1-thecous
Utricle
with 1 ovule
Seed
globose, up to 0.5 mm long, smooth with spongy outer layer
x = 10 (high polyploidy)
Nomenclature:
Wolffia
Horkel ex Schleid.
Schleiden: 233 (1844)
Brown: 40 (1897)
Den Hartog: 591 (1969)
Landolt: 544 (1986)
Cook: 113 (1990)
Distribution & Notes:
Global
: Species 9, ± cosmopolitan, absent from colder areas
Southern Africa
: Species 2, widespread
References:
BROWN, N.E. 1897.
Lemnaceae
.
Flora capensis
7
COOK, C.D.K. 1990.
Aquatic plant book
. SPB Academic Publishing, The Hague
DEN HARTOG, C. 1969. Nomina conservanda proposita.
Taxon
18
LANDOLT, E. 1986. The family of
Lemnaceae
- a monographic study.
Veröffentlichungen des Geobotanischen Institutes der Eidgenössischen Technischen Hochschule, Stiftung Rübel, in Zürich
95 (71)
SCHLEIDEN, M.J. 1844.
Beiträge zur Botanik
1. Engelmann, Leipzig
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