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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 7498 ".
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Cheilocostus borneensis

Cheilocostus borneensis A.D.Poulsen


BOTANICAL NAME: Cheilocostus borneensis
SUBGENUS:
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PRIMARY SOURCE USED FOR DESCRIPTION:Gardens Bulletin Singapore 62 (1): 143-150. 2010
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Cheilocostus borneensis deviates from the generic description of Cheilocostus (Specht and Stevenson, 2006) by not having axillary branching of the vegetative shoots. Vegetative branching is shared by Cheilocostus and Tapeinochilos but is lost in some Tapeinochilos species and, similarly, may have been lost in C. borneensis. Molecular evidence using four gene regions (ITS, ETS, rpb2 and trnL-F) and samples from a single accession (the type) places this species in Cheilocostus, sister to C. globosus (Blume) C. Specht. Cheilocostus borneensis is similar to C. globosus in having a radical inflorescence, but is easily distinguished by having distinctly chocolate brown sheaths on the stem (also obvious in herbarium specimens), having few larger leaves congested at the top of the stem, the leathery almost plastic-like texture of the leaves, and by not having axillary branching. As the flowers of C. globosus vary in colour of the labellum from white to yellow, dark orange to red, this character by itself is not always conclusive in separating the two. A more useful floral character to separate the two species is the apex of the calyx: C. borneensis is soft, whereas C. globosus has rigid points that, if touched, will easily make you bleed (i.e. pungent).
NATURAL DISTRIBUTION:Borneo, Sarawak
HEIGHT:0 to 0 meters
Botanical Description for this Species
For illustrations or explanation of terminology, click on the linked plant part or column header.
Descriptions used for plant identification key are shown in BOLD.
Plant PartGeneralColorHairsTextureShape LengthWidth
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Ligule




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Calyx




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Labellum




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Stamen




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