Description of Costus cuspidatus
For illustrations or explanation of terminology, click on the linked plant part or column header.
Descriptions used for plant identification key are shown in green.
| Plant Part |
General |
Color |
Hairs |
Texture |
Shape |
Length |
Width |
| Rhizome |
roots fleshy, somewhat thickened on the ends
|
|
|
|
|
to cm |
to cm |
| Sheath |
|
purple-red
|
glabrous
|
punctate
|
|
to cm |
5 to 10 mm |
| Ligule |
|
|
glabrous
|
|
|
1 to 2 mm |
to mm |
| Petiole |
|
|
sparsely puberulous
|
|
|
1 to 3 mm |
to mm |
| Leaf |
|
|
|
|
narrowly elliptic to narrowly obovate
|
11 to 18 cm |
3.5 to 6 cm |
| ...upper |
|
|
glabrous to sparsely puberulous
|
|
|
|
|
| ...under |
|
|
glabrous to sparsely puberulous
|
|
|
|
|
| ...base |
|
|
|
|
cunate
|
|
|
| ...apex |
|
|
|
|
shortly acuminate
|
1 to 3 mm |
|
| Inflorescence |
terminal on leafy stem
|
|
|
|
|
to cm |
to cm |
| Bract |
|
light green
|
glabrescent
|
herbaceous, fleshy
|
|
to 4 cm |
to 1.5 cm |
| Appendage |
appendage found on bract or apex reflexed
|
green
|
glabrous to sparsely puberulous
|
foliaceous
|
narrowly triangular to deltate
|
2 to 11 cm |
1.5 to 4.5 cm |
| Bracteole |
bicarinate on adaxial side, 2 lobed at apex
|
|
glabrous
|
membranaceous
|
tubular, often split on abaxial side
|
2.5 to 3 cm |
to cm |
| Flower |
3 to 8 flowered, pedicel fleshy green, basal part of stamen and labellum joined in tube 35-40 mm long
|
orange
|
|
|
|
to cm |
to cm |
| Calyx |
21-41 mm long ,with callus 2-3 mm long
|
light green
|
densely minutely puberulous
|
membranaceous to herbaceous
|
|
3 to 4 cm |
to cm |
| Corolla |
tube 25 mm long
|
orange
|
glabrous to sparsely puberulous
|
|
|
to 6 cm |
to cm |
| Labellum |
margins dentate
|
orange
|
|
|
suborbicular in outline
|
to cm |
5 to 7 cm |
| Stamen |
anther obtuse at the apex , color golden yellow
|
yellow
|
apex densley covered with white hairs on adaxial
|
|
narrowly triangular
|
to 1.5 cm |
0.5 to 0.8 cm |
Subgenus:Cadalvena