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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 4616 ".
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Cheilocostus tonkinensis

Costus tonkinensis Gagnep.


BOTANICAL NAME: Cheilocostus tonkinensis
SUBGENUS:n/a
GROUP:
SECTION:
PRIMARY SOURCE USED FOR DESCRIPTION:Flora of China
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Description from Flora of China, Tom Wood says this is a synonym for Costus globosus, and Maas says it is part of the Costus globosus complex, needing more study to determine the subspecies or separate species.
NATURAL DISTRIBUTION:forest floors, Vietnam
HEIGHT:2 to 4 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
Rhizome




0 to 0 cm0 to 0 cm
Sheath




0 to 0 cm 0 to 0 mm
Ligule




0 to 0 mm 0 to 0 mm
Petiole




0 to 0 mm 0 to 0 mm
Leaf



obovate-oblong
12 to 20 cm 4 to 8 cm
...upper

glabrescent




...under

glabrescent




...base



attenuate or subrounded


...apex



acute
0 to 0 mm
Inflorescence Basal - Arrising from rhizomes



globose or ovoid
0 to 0 cm 0 to 8 cm
Bract Imbricate



oblong, apex sharply pointed
2.5 to 4.5 cm 0.0 to 0.0 cm
Appendage




0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole



apex sharply pointed
1.0 to 1.4 cm 0.0 to 0.0 cm
Flower
yellow



0 to 0 cm 0 to 0 cm
Calyx 3 toothed, acute at apex



apex slightly widened
2.0 to 3.0 cm 0.0 to 0.0 cm
Corolla longer than calyx



lobes linear-lanceolate
0.0 to 3.2 cm 0.0 to 0.0 cm
Labellum base slightly narrowed, margin crisped



trumpet shaped
5.0 to 6.0 cm 0.0 to 0.0 cm
Stamen petaloid, apex emarginate
yellowish



0.0 to 0.0 cm 0.0 to 0.0 cm

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