Branches
3-winged, ribs compressed, margin strongly undulate, becoming horny with age
Areoles
up to 40 mm apart, with 1 central spine 2-4 mm long and up to 2 peripheral spines 2-4 mm long
Flowers
solitary
Sepals
lorate, greenish or yellowish, apices acuminate
Petals
spathulate, green, apices acute
Stamens
of mature flower roughly parallel to perianth
Style
cream; stigma lobes ± 24
Fruit
(ripe) red, oblong, scaly
Seeds
black
x = 11
Nomenclature:
*Hylocereus
(A.Berger) Britton & Rose
Britton & Rose: 428 (1909)
Backeberg 2: 803 (1959)
IOS Working Party: 69 (1986)
IOS Working Party: 89 (1990)
Barthlott & Hunt: 179 (1993)
Distribution & Notes:
Global
: Species ± 18, tropical America
Southern Africa
: *
Hylocereus undatus
(Haw.) Britton & Rose, is recorded as invasive in KwaZulu-Natal and Eastern Cape
References:
BACKEBERG, C. 1958-1962.
Die
Cactaceae
. Gustav Fischer, Jena
BARTHLOTT, W. & HUNT, D.R. 1993.
Cactaceae
. In K. Kubitzki, J.G. Rohwer & V. Bittrich,
The families and genera of flowering plants
2. Springer-Verlag, Berlin
BRITTON, N.L. & ROSE, J.N. 1909. The genus
Cereus
and its allies in North America.
Contributions from the United States National Herbarium
12
IOS WORKING PARTY 1986. The genera of the
Cactaceae
: towards a new consensus.
Bradleya
4
IOS WORKING PARTY 1990. The genera of
Cactaceae
: progress towards consensus.
Bradleya
8
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