Leaves
alternate, leaf blade flattened, linear up to 100 mm long and 2 mm wide, with submarginal fibrous strands and submarginal veins connected to midvein by obliquely extended commissures; sheathing base auriculate
Male flowers
single, naked; stamen with 8 microsporangia, connective terminating in a blunt appendage and with two vestigial outgrowths opposite each other on connective, hidden by anther lobes at maturity
Female flowers
borne in a tubular sheath; carpel solitary; style lengthens rapidly during anthesis and displays a large, ephemeral, obliquely funnel-shaped stigma
Fruit
an asymmetrical, warty, bean-shaped drupelet
Nomenclature:
Pseudalthenia
Nakai
Nakai: 213 (1943)
Den Hartog: 95 (1980)
Cook: 222 (1990)
Vleisia
Toml. & Posl.
Tomlinson & Posluszny: 273 (1976)
Distribution & Notes:
Southern Africa
: Species 1:
Pseudalthenia aschersoniana
(Graebn.) Hartog, endemic to the W Western Cape; in brackish, coastal pools near Lamberts Bay and south to the Cape Peninsula
References:
COOK, C.D.K. 1990.
Aquatic plant book
. SPB Academic Publishing, The Hague
DEN HARTOG, C. 1980.
Pseudalthenia antedates
Vleisia, a nomenclatural note.
Aquatic Botany
9
NAKAI, T. 1943.
Ordines, familiae, tribi, genera, sectiones, species, varietates, formae et combinationes novae
. Prof. Nakai-Takenoshin adhuc ut nova edita, Tokyo, 256 pp.
TOMLINSON, P.B. & POSLUSZNY, U. 1976. Generic limits in the
Zannichelliaceae
(sensu Dumortier).
Taxon
25 (2/3)
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