Perennial, aquatic, scapose, dioecious herbs; rhizome bulbous, covered with short thin roots
Leaves
submerged or erect; petioles up to 0.4 m long; blades linear to lanceolate, base decurrent to rounded
Inflorescence
a 3-merous compound umbel, sometimes reduced and few-flowered, overtopping leaves, with 3 basal acuminate bracts which at first envelop umbel in bud; bracts scarious, semipersistent, upper bracts reduced or 0
Flowers
3 in a whorl, evenly spaced, pedicelled
Male flowers
with 3 concave sepals; petals 3, smaller than sepals; stamens 9; sterile carpels ± 12
Female flowers
with 3 concave sepals; petals 0 or minute; staminodes 0-12; carpels many, closely arranged on a small receptacle, compressed; stigma ventral, discoid, papillose, subsessile; ovule basal
Achenes
obovate-orbicular, laterally compressed, with 2 narrow, circular wings
Nomenclature:
Burnatia
Micheli
Micheli: 81 (1881)
Obermeyer: 99 (1966)
Cook: 27 (1990)
Distribution & Notes:
Global
: Species 1:
Burnatia enneandra
Micheli, tropical and southern Africa
Southern Africa
: N Namibia and N KwaZulu-Natal
References:
COOK, C.D.K. 1990.
Aquatic plant book
. SPB Academic Publishing, The Hague
MICHELI, M. 1881.
Alismaceae
. In A.L.P.P. de Candolle,
Monographiae phanerogamarum
3. Masson, Paris
OBERMEYER, A.A. 1966.
Alismataceae
.
Flora of southern Africa
1
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