Iguanura chaiana Kiew, Kew Bull. 34: 144 (1979)

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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)A

Discussion

  • This species is distinguished by the combination of the numerous narrow leaflets and the much-branched inflorescence. Iguanura palmuncula Becc. var. magna Kiew has an inflorescence with 7-10 rachillae, the lowermost with second-order branching but the rachillae are much shorter (8-13 cm long) and the lamina is smaller (30-50 cm long) and has fewer (up to 5) pairs of pinnae; in addition the anthers are lobed and the fruit is strongly ridged. I. chaiana is known from a single specimen. (R. Kiew, New species and records of Iguanura (Palmae) from Sarawak and Thailand. 1979)B

Diagnosis

  • ab L palmuncula Becc. var. magna Kiew foliolis numerosis angustis et antheris non lobatis differt.
    Palma humilis, foliis foliola numerosa 1-2-costata angusta ferentibus; inflorescentia ramosissima. (R. Kiew, New species and records of Iguanura (Palmae) from Sarawak and Thailand. 1979)B

Etymology

  • Takes its name from the collector, Paul Chai. (R. Kiew, New species and records of Iguanura (Palmae) from Sarawak and Thailand. 1979)B

Description

  • Small palm with stem c. 3 m tall and 2 cm diam.; internodes to 1.25 cm long. Leaf sheath 16 cm long, tough and fibrous (? persistent), covered with a dense, reddish-brown tomentum; petiole 5 cm long; lamina 65-70 cm long with c. 27 pairs of narrow pinnae, 30 cm long and 1-2 cm broad with 1 or 2 main lateral veins. Inflorescences among the leaves to 60-75 cm long; with peduncle 35 cm long, densely tomentose; rachillae 9-11, the lowermost 25-40 cm long with 2-3 second-order branches; upper rachillae 16-20 cm long. Floral triads 2-4 mm apart. Staminate flowers yellow, calyx 1 mm long; corolla 2 mm long and ribbed; stamens with unlobed anthers, 1 mm long; pistillode columnar, 1 mm long. Pistillate flowers (immature) with calyx 1 mm long; corolla 1 mm long and ribbed; staminodes minute; ovary ovoid 0.75 mm long. Mature fruit unknown; immature fruit globose without ribs or ridges; epicarp minutely verrucose. (R. Kiew, New species and records of Iguanura (Palmae) from Sarawak and Thailand. 1979)B

Materials Examined

  • BORNEO: SARAWAK. 2nd Division, Bukit Ubah-Ribu, Ulu Sg. Kaup, Lubok Antu, Chai S33784 (holotype SAR). (R. Kiew, New species and records of Iguanura (Palmae) from Sarawak and Thailand. 1979)B

Bibliography

A. World Checklist of Arecaceae
B. R. Kiew, New species and records of Iguanura (Palmae) from Sarawak and Thailand. 1979