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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 5230 ".
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SUBGENUS:Costus
GROUP:1-bracts with appendage
SECTION:I-Costus
PRIMARY SOURCE USED FOR DESCRIPTION:Maas, Flora Neotropica No. 8, 1972
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Unnamed species, closely related to Costus claviger and Costus erythrophyllus, differs from the latter by smaller ligule and cordate leaf base.
NATURAL DISTRIBUTION:Colombia and Brazil
HEIGHT:0 to 2 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

densely to minutely puberulous


0 to 0 cm 5 to 10 mm
Ligule

densely to minutely puberulous

truncate
2 to 5 mm 0 to 0 mm
Petiole

densely to puberulo-sericeous


2 to 3 mm 0 to 0 mm
Leaf



narrowly elliptic
15 to 25 cm 4 to 6 cm
...upper

glabrous to sparsely minutely puberulous




...under

densely to sparsely minutely puberulous




...base



cordate


...apex



acuminate
5 to 15 mm
Inflorescence terminal



ovoid
8 to 9 cm 3 to 5 cm
Bract callus absent
red
abaxial minutely puberulous, adaxial similar, glab
coriaceous
broadly ovate to ovate
2.5 to 3.0 cm 1.5 to 2.5 cm
Appendage reflexed or ascending
green
densely minutely puberulous
foliaceous
ovate-triangular
0.5 to 3.0 cm 1.0 to 1.5 cm
Bracteole callus 3 mm long

densely minutely puberulous

boat shape
2.0 to 2.4 cm 0.0 to 0.0 cm
Flower




0 to 0 cm 0 to 0 cm
Calyx
red
densely minutely puberulous

lobes triangular to deltate
1.2 to 1.6 cm 0.6 to 0.8 cm
Corolla
white
glabrous


0.0 to 7.0 cm 0.0 to 0.0 cm
Labellum



broadly obovate when spread
4.5 to 5.0 cm 3.5 to 4.0 cm
Stamen anther 7-8 mm long




0.0 to 4.0 cm 0.0 to 0.0 cm

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