Helixanthera cylindrica

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Helixanthera cylindrica


Glabrous except for young internodes and sometimes the inflorescence and flowers sparsely brown tomentose and soon glabrescent. Leaves scattered, subopposite or sub- verticillate; lamina elliptic or ovate, 6-15(-20) by (0.8-)1.5-6 cm, attenuate or cuneate at the base to a petiole 8-15 mm long, irregular at the apex but normally somewhat attenuate and acute, dull or slightly glossy above, dull below; venation pinnate with the midrib distinct on both sides, the lateral veins usually distinct above and the many parallel tertiary veins obscure but forming a finely striate pattern above. Inflorescences at the nodes and rarely terminal, a few- to 25-flowered raceme; axis 50-250 mm long, angular; pedicels (1—)5—18(—27) mm long; bracts simple, rounded, 1-1.5 mm long. Ovary cylindric, 5-8 mm long; calyx limb spreading, 1-1.5 mm long.


Asia-Tropical: Borneo present; Jawa (Jawa present); Lesser Sunda Is. (Bali present); Malaya (Peninsular Malaysia present); Sulawesi (Sulawesi present); Sumatera (Sumatera present), Burma to Vietnam present
Burma to Vietnam; Malesia: Sumatra, Peninsular Malaysia,Borneo, Java, Celebes, Bali.


Closely related to Helixanthera alata, H. crassipetala and H. maxwelliana. Being the most widespread and least specialized species in the group, it is probably the one from which the others have differentiated.


Backer & Bakh. f. 1965 – In: Fl. Java: 71