This page contains photos and description of a species, form or cultivar of Costaceae.

Gingersrus Database Taxon ID 3605

Paracostus paradoxus

OLD NAME: Paracostus paradoxus

NEW NAME: Paracostus paradoxus


FULL SCIENTIFIC NAME: Paracostus paradoxus (K.Schum.) C.Specht

STATUS : accepted


FIELD OBSERVATIONS:(If field observations are available, you can click on the link to open in a new window.)

PHOTOS:(If photos are available, you can click on the link to open in a new window.)


This is an accepted species name from Borneo. This species was moved from Costus to the new genus Paracostus in February 2006. Later in 2006 there were three new species described from Borneo with white flowers, and this species name was retained for the yellow flowering species. It is described in Folio Malaysiana as growing 30-70 cm tall, either solitary or in a clump of up to 8 plants with a very short or absent ligule, petiole 8-16 mm long, 2-5 leaves per plant dark green, shiny and glabrous. The inflorescence come from the rootstock or node producing a cluster of 3-5 flowers opening in succession. The bract is transparent light brown, tubular, 20-25 mm long. Bracteole is boat shaped (unicarinate?) and whitish. Calyx is transparent watery green and white at base. Corolla is whiteish and light yellow toward the labellum. Labellum described as "bright yellow to yellow, light brown stripes in the middle of the inner surface".

In 2010 I was in the Mulu National Park and saw large clumps of Paracostus, virtually colonizing an area along a stream, but they were not in flower so I cannot say whether it was P. paradoxus or the newly described P. muluensis.

KEW BORNEO PROJECT - plants collected at Brunei Darussalam, on the north-western coast of the island of Borneo. C. paradoxus K.Schum.Herb; on ground · VEG: LMDF, HDF, Secondary Forest · HAB: valley bottom; near running fresh water · GEO: Lambir formation, shale, Setap Shales · ALT: 40-150 m BEL: Labi, Rampayoh, Cowley 160; Labi, Rampayoh, Cowley 176. TEM: Amo, Batu Apoi Forest Reserve, Poulsen 400; Amo, Sg. Temburong, Coode 6521; Amo, Sg. Temburong, Wong 1965; Batu Apoi, Bt. Gelagas (Bt. Suang), Simpson 2381 · Borneo: Sarawak

R3204 from Lambir Hills, Sarawak, found on shady slope near a stream, ID uncertain, plant left with John Mood in Hawaii.

ACCESSIONS:Click links (if any) to see details of individual collections. R3204-

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Photos (if available) of Taxon ID 3605
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Paracostus paradoxus in habitat - Click to see full sized image
Photo# 598 Accession# R0
Paracostus paradoxus in habitat