Xenostegia tridentata

Simões, A. R., Silva, H. & Silveira, P., 2011, The Convolvulaceae of Timor with special reference to East Timor, Blumea 56 (1), pp. 49-72 : 68

publication ID	https://doi.org/10.3767/000651911X573002
persistent identifier	https://treatment.plazi.org/id/03F30D5F-FFCE-B158-DD65-F974FA107668
treatment provided by	Felipe
scientific name	Xenostegia tridentata
status

Treatment

1. Xenostegia tridentata View in CoL (L.) D.F.Austin & Staples — Map 20

Xenostegia tridentata (L.) D.F. Austin & Staples (1980) 533.

Convolvulus tridentatus L. (1753) 157.

Ipomoea angustifolia Jacq. (1788) 367; Fawc. (1885) 511.

Convolvulus hastatus Desr. in Lam. (1792) 542.

Ipomoea filicaulis Blume (1826) View in CoL 721; Decne. (1834) 390; Span. (1841) 338; Miq. (1856) 603.

Merremia tridentata View in CoL (L.) Hallier f. (1893a) 552; Ooststr.(in Ooststr.& Hoogland 1953) 445; Kalkman (1955) 216.

Merremia tridentata View in CoL (L.) Hallier f. subsp. hastata (Desr.) Ooststr. (1939) View in CoL 317.

Merremia tridentata (L.) Hallier f. subsp. angustifolia (Jacq.) Ooststr. (1939) 323.

Distribution — Bangladesh (?), Cambodia, India, Indonesia,

Laos, Malaysia, Myanmar, New Guinea, Philippines, Singapore, Sri Lanka, Thailand, Vietnam; Africa, North Australia ( Fang & Staples 1995) . Also in East Timor.

Habitat & Ecology — Winding in grass; in sandy places near the coast (Van Ooststroom & Hoogland 1953).

Uses — The leaf is made into poultice and applied to the head in cases of jungle-fever in Peninsular Malaysia (Van Ooststroom & Hoogland 1953).

Note — Van Ooststroom (Van Ooststroom & Hoogland 1953) proposed several subspecies within Merremia tridentata (L.) Hallier f. Because of the obvious intergradation between the characters, our view is that there are no adequate differences to recognise the three subspecies and they should be treated as one single taxon ( Xenostegia tridentata ). It is notable that the specimens we have seen from Timor all seem to fit the description of Merremia tridentata subsp. hastata , which agrees with Van Ooststroom’s notes on the distribution of the subspecies. Van Ooststroom does not report subsp. tridentata from Timor, and no distribution notes are indicated for subsp. angustifolia , but synonyms of subsp. angustifolia ( Ipomoea angustifolia Jacq. , Ipomoea filicaulis Blume ) have been reported to occur in Timor ( Decaisne 1834, Spanoghe 1841, Fawcett 1885).