Changes

| Spices and condiment use= 1

}}

<big>''[[Jateorhiza palmata]]'' (Lam.) Miers</big>

__NOTOC__

{{DISPLAYTITLE:''Jateorhiza palmata'' (PROTA)}}

:Protologue: Hook., Niger Fl.: 214 (1849).

== Synonyms ==

== Vernacular names ==

== Origin and geographic distribution ==

In a test with rats, columbin suppressed the induction of adenocarcinomas in the colon by administration of the carcinogen azoxymethane. Columbin shortened the sleeping time induced by a urethane and α-chloralose mixture, but prolonged the sleeping time induced by hexobarbital. This may be explained by an effect of columbin on drug metabolizing enzymes in the liver. A methanol extract obtained from the rhizome inhibited the growth in vitro of a range of fungi tested. In the European Union the use of the essential oil (calumba extract) is permitted in animal feeds (CoE 247).

Dioecious liana from tuberous roots; branchlets densely appressed hairy. Leaves alternate; stipules absent; petiole 18–25 cm long; blade broadly rounded in outline, palmately 5-lobed, 15–35 cm × 16–40 cm, base deeply cordate, lobes ovate and acuminate at apex, membranous, appressed hairy on both surfaces, palmately veined with 5 main veins. Male inflorescence a branched axillary panicle up to 40 cm long, branches 2–10 cm long, bearing clusters of 3–7 flowers; female inflorescence an axillary raceme up to 10 cm long. Flowers unisexual, sessile; sepals 6, 3 outer ones oblong to elliptical, 3 inner ones obovate, c. 3 mm × 1.5 mm; petals 6, c. 2 mm long, somewhat concave, mostly abruptly bent inwards at apex, margins incurved; male flowers with 6 free stamens 1–2 mm long, slightly fused to the petals; female flowers with 6 tongue-shaped staminodes, ovary superior, consisting of 3 free, ovoid carpels, styles short, recurved, stigma broad. Fruit composed of up to 3 ovoid drupelets 2–2.5 cm × 1.5–2 cm, appressed stiff hairy, stone ovoid, flattened, one side smooth, other side with silky hairs, 1-seeded. Seed with fleshy, ruminate endosperm.

In Mozambique the stems growing from the roots may be annual.

''Jateorhiza'' comprises 2 species, both in tropical Africa. It was formerly considered a section of ''Chasmanthera''.

== Ecology ==

''Jateorhiza palmata'' occurs in rainforest and fringing forest, up to 1500 m altitude.

== Management ==

== Author(s) ==

== Correct citation of this article ==

[[fr:{{PAGENAME}}]]