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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 4041 ".
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Chamaecostus congestiflorus

Chamaecostus congestiflorus (Rich. ex Gagnep.) C.Specht & D.W.Stev.


BOTANICAL NAME: Chamaecostus congestiflorus
SUBGENUS:
GROUP:Bracts not appendaged
SECTION:
PRIMARY SOURCE USED FOR DESCRIPTION:Maas, Flora Neotropica No. 8, 1972
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Closely related to C. lanceolatus, differs in the color of the flowers and the long fimbriate labellum, densly hairy corolla.
NATURAL DISTRIBUTION:Guiana, Venezuela and Amazonian Brazil in wet forests, often growing on granite rocks.
HEIGHT:0 to 1 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

glabrous to densely minutely puberulous


0 to 0 cm 5 to 10 mm
Ligule

glabrous to densely minutely puberulous


1 to 2 mm 0 to 0 mm
Petiole

glabrous to densely minutely puberulous


1 to 5 mm 0 to 0 mm
Leaf



narrowly elliptic to narrowly obovate
10 to 20 cm 2 to 6 cm
...upper

glabrous to densely minutely puberulous




...under

glabrous to densely minutely puberulous




...base



cuneate to rounded, rarely cordate


...apex



acuminate
5 to 15 mm
Inflorescence terminal on a leafy stem, elongating to 8 cm when in fruit



broadly ovoid
3 to 5 cm 0 to 0 cm
Bract not imbricate 5-12 mm long, callus 2-7 mm long, yellow
green
glabrous to densely minutely puberulous
herbaceous to chartaceous
triangular, often mucronate
1.5 to 2.2 cm 0.5 to 1.2 cm
Appendage appendage not found on bract




0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole
green
glabrous to densely minutely puberulous
herbaceous to chartaceous
tubular, split deeply on abaxial side
1.3 to 1.9 cm 0.0 to 0.0 cm
Flower
white



0 to 0 cm 0 to 0 cm
Calyx lobes subulate, calyx tube often deeply splirt by the flowerbud during anthesis.
green
glabrous to densely minutely puberulous
herbaceous to chartaceous

2.5 to 3.2 cm 0.0 to 0.0 cm
Corolla tube 20 mm long
creamy white
densely puberulous to villose


5.0 to 6.0 cm 0.0 to 0.0 cm
Labellum margins densely fimbriate
creamy white


broadly angular-obovate
0.0 to 3.5 cm 0.0 to 4.0 cm
Stamen basal part of labellum and stamen joined in a 20 mm tube, stigma cup shaped
creamy white



0.0 to 0.0 cm 0.0 to 0.0 cm

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