Iguanura prolifera Kiew, Gard. Bull. Singapore 28: 214 (1976)

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Borneopresent (World Checklist of Arecaceae)B

Diagnosis

  • Caulis 1.5 crassus. Vagina folii crassa, fibrosa c. 10 cm longa. Folia marcescentia. Petiolus 12-24 cm longus. Lamina 25-45 cm longa, 17-19 cm lata indivisa, vel pare apicale segrnentorum latorurn et 1-2 paribus infinis angustorum. Inflorescentia inter folia, simplex, 25-35 cm longa, pedunculos 15-25 cm longo. Flos masculus antheris non lobatis. Fructus oblongus porca unica dorsale, porcis duobus lateralibus. (Kiew R. 1976. The Genus Iguanura Bl. (Palmae). Gardens' Bulletin Singapore 28:191-226)A

Description

  • Stem 1 1/2 cm thick. Leaf sheath thick, fibrous c. 10 cm long. Leaves marcescent. Petiole 12-24 cm long. Lamina 25-45 cm long and 17-19 crn wide, simple or with a wide apical pair of leaf segments and 1-2 narrow pairs of basal parallel-sided segments. Inflorescence among the leaves, unbranched, 25-35 cm long of which peduncle is 15-25 cm long. Male flowers with unlobed anthers. Fruits oblong, ridged with one dorsal and two lateral ridges. (Kiew R. 1976. The Genus Iguanura Bl. (Palmae). Gardens' Bulletin Singapore 28:191-226)A

Materials Examined

Notes

  • This species is recognised by its unbranched inflorescence and oblong, ridged fruits and is distinguished from I. leucocarpa and I. corniculata, which have unbranched inflorescences, by their trapezoid leaf segments and their fruit shapes. and from I. wallichiana var malaccensis with parallel-sided leaf segments by its olive-shaped fruits.
    Hallier's collection was determined by Beccari as "I. macrostachya var prolitem". His variety had a simple leaf or a scarcely segmented one compared with the typical variety with leaves with about 10 segments. Although l. prolitera?and I. macrostachya both have an unbranched inflorescence, they differ in the length of the inflorescence and the shape of the fruit: I. macrostachya always has a long inflorescence. and the fruits are olive-shaped and ridged while I. prolifera possesses a shorter inflorescence (about half the length of that of I. macrostachya) and the fruit which is oblong in shape has an additional lateral ridge on either side of the main ridge. I have elevated Beccari's varietal name "prolifera" to the species level. (Kiew R. 1976. The Genus Iguanura Bl. (Palmae). Gardens' Bulletin Singapore 28:191-226)A