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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
SUBGENUS:
GROUP:
SECTION:
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
LAST UPDATED:
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
Rhizome




0 to 0 cm0 to 0 cm
Sheath

strigose, hirsute or glabrescent


0 to 0 cm 15 to 20 mm
Ligule

like sheaths on margins

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

densely strigose to hirsute


5 to 15 mm 0 to 0 mm
Leaf



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

glabrous, strigose costa & margins




...under

densely strigose




...base



cunate to rounded


...apex



shortly acuminate
0 to 0 mm
Inflorescence



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
coriaceous
ovate to ovate-triangular, acute or obtuse
 3.5 to 5.0 cm 2.0 to 3.0 cm
Appendage




0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole

sparsely strigulose

boat shape
2.0 to 2.3 cm 0.0 to 0.0 cm
Flower




0 to 0 cm 0 to 0 cm
Calyx

glabrous to sparsely strigulose

lobes shallowly triangular
1.0 to 1.4 cm 0.0 to 0.0 cm
Corolla
yellow


0.0 to 3.0 cm 0.0 to 0.0 cm
Labellum
yellow



0.0 to 3.0 cm 0.0 to 0.0 cm
Stamen
yellow


0.0 to 3.0 cm 0.0 to 0.0 cm

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