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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 5233 ".
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Costus Maas species A

BOTANICAL NAME: Costus Maas species A
PRIMARY SOURCE USED FOR DESCRIPTION:Maas, Flora Neotropica No. 8, 1972
SECONDARY SOURCES:Manual de Plantas de Costa Rica Vol II, 2003, Missouri Botanical Gar
NOTES AND DISTINGUISHING CHARACTERISTICS:Maas says the specimens he describes here have very peculiar deformed looking bracts and may represent a new species. He was unable to examine flower structure and did not name this. NOTE: Per Manual des Plantas de Costa Rica this is the plant later described and named by Maas as Costus curvibracteatus.
NATURAL DISTRIBUTION:Panama in cloud forest, thick underbrush along river, 600-2000 m
HEIGHT:1 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

0 to 0 cm0 to 0 cm

strigose, hirsute or glabrescent

0 to 0 cm 15 to 20 mm

like sheaths on margins

truncate to obliquely truncate
5 to 10 mm 0 to 0 mm

densely strigose to hirsute

5 to 15 mm 0 to 0 mm

narrowly elliptic to narrowly obovate
13 to 25 cm 4 to 8 cm

glabrous, strigose costa & margins


densely strigose


cunate to rounded


shortly acuminate
0 to 0 mm

ovoid to broadly ovoid, acute or obtuse
4 to 11 cm 4 to 7 cm
Bract margins entire or erose, callus yellow inconspicuous
orange-red to scarlet
exposed glabrous to densly strigose, covered glabr
ovate to ovate-triangular, acute or obtuse
3.5 to 5.0 cm 2.0 to 3.0 cm

0.0 to 0.0 cm 0.0 to 0.0 cm

sparsely strigulose

boat shape
2.0 to 2.3 cm 0.0 to 0.0 cm

0 to 0 cm 0 to 0 cm

glabrous to sparsely strigulose

lobes shallowly triangular
1.0 to 1.4 cm 0.0 to 0.0 cm

0.0 to 3.0 cm 0.0 to 0.0 cm

0.0 to 3.0 cm 0.0 to 0.0 cm

0.0 to 3.0 cm 0.0 to 0.0 cm

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