The unripe fruit by
The caudex with entrance by
The inflorescense by
This epiphytic member of
family was described by Camilla Rose Huxley & Matthew H. P. Jebb in 1991. It is found
in the jungles of Papua New Guinea. The hollow and rough
caudex will grow to
25 centimetres in diameter, the branches reach 50 centimetres in
flowers are white on this ant plant, while the fruits are
Key to the
Species of Anthorrhiza.
1a. Spines present on stem… = 2.
1b. Spines absent on stem or very few… = 7.
2a. Spines largely, but not exclusively confined to the
inflorescence forming a cushion in the leaf axils. Leaves 4-10cm
wide… = 3.
2b. Spines scattered on stem. Leaves usually less than 4cm wide…
3a. Inflorescence with fleshy ridges separating flower-producing
tissue. Spines straight, usually dense on tuber. Corolla lobes
greenish white. Anthers cream. =
3b. Inflorescence without ridges of tissue. Spines gently
curved, usually sparse on tuber. Corolla white. Anthers blue… =
4a. Lamina less than 8cm long, stipules persistent, rounded… =
4b. Lamina more than 10cm long, stipules caducous (easily shed),
triangular or rounded… = 5.
5a. Stem dorsiventral, (flattened + distinct upper and lower
surfaces) more spines on upper side, spines light brown to
blackish. Leaf margin crinkled. Corolla blue… =
Rose Huxley & Matthew H. P. Jebb in 1991. Papau New Guinea, 15
centimetres in diameter. One or rarely two, unbranded stems. Pale
blue/turquoise flowers. Fruits orange.
5b. Stem radially symmetrical, rarely dorsiventral. Spines
golden brown. Leaf margin flat. Corolla white to greenish white…
6a. Inflorescence bracts leathery, splitting regularly,
apiculate, persistent. Petals with long slender lobe tips… =
6b. Inflorescence bracts papery, tearing irregularly, not
apiculate, caducous (easily shed.) Petals acute-rounded… =
7a. Inflorescence covered by leathery and papery bracts. Fruit
with 4-8 pyrenes… =
7b. Inflorescence sunken or covered by a dense cushion of bract
hairs. Fruit with 2 pyrenes… =8.
8a. Tuber surface smooth. Leaves to 17x7cm. Inflorescence
narrowly cordate in outline… = Anthorrhiza mitis.
Camilla Rose Huxley & Matthew H. P. Jebb in 1991. Papau New
Guinea. Diameter 30 centimetres, height of caudex 26 centimetres
Total?. Several unbranched stems. Flowers whit, fruits orange-red.
8b. Tuber surface areolate (roughened by areolae). Leaves to
11x4cm. Inflorescence arch-shaped in outline... =