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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 3608 ".
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Costus spectabilis

Costus spectabilis (Fenzl) K.Schum.



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Photo# 11269 Specimen# R2934
Costus spectabilis


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Photo# 11270 Specimen# R2934
Costus spectabilis


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Photo# 11271 Specimen# R0
Costus spectabilis at Smithsonian US Bot. Research Greenhouse, Washington, DC USBRG#96-284


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Photo# 11272 Specimen# R0
Costus spectabilis at Smithsonian US Bot. Research Greenhouse, Washington, DC USBRG#96-284


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Photo# 11273 Specimen# R0
Costus spectabilis at Smithsonian US Bot. Research Greenhouse, Washington, DC USBRG#96-284


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Photo# 11274 Specimen# R0
Costus spectabilis at http://www.nchila-wildlife-reserve.com/flp/fl8.htm


BOTANICAL NAME: Costus spectabilis
SUBGENUS:
GROUP:
SECTION:
PRIMARY SOURCE USED FOR DESCRIPTION:Koechlin - Flore du Gabon, Flore du Cameroun, 1965
SECONDARY SOURCES:Locke - Flora of Tropical East Africa, 1985
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:KOECHLIN KEY: Plants stemless, 4 leaves in a rosette, flat on the ground, flowers yellow. Flowers after the "feux de brousse" and begins with the rainy season. (NOTE: this plant naturally dormant in dry season.) LOCKE & POHILL, Flora of Tropical East Africa - Says this species is often confused with Costus macranthus. Leaves usually fully developed at time of flowering, vs. C. macranthus which usually flowers before or during leaf development. Also distinguished by flower size - C. specatabilis flowers less than 10 cm in overall length, C. macranthus more than 12 cm long. Also noted collection in N. Zambia with small flowers, no leaves, very hairy bracts, calyces, petals.
NATURAL DISTRIBUTION:Found in savannahs, all of intertropical Africa, humid or semi-humid, Senegal, east coastal Africa. Distr. from Sierra Leone to Sudan, south to Zimbabwe and Angola. Also Uganda, Kenya and Tanzania in W. Africa.
HEIGHT:0 to 0 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
scales brown



0 to 0 cm2 to 3 cm
Sheath




0 to 0 cm 0 to 0 mm
Ligule



practically null
0 to 0 mm 0 to 0 mm
Petiole



sharply narrow at the base but without a petiole
0 to 0 mm 0 to 0 mm
Leaf 4 leaves in rosette,flat on the ground



broadly obovale
4 to 15 cm 4 to 15 cm
...upper
green, red edges
glabrous




...under

pubescent




...base






...apex



obtusely acuminate
0 to 0 mm
Inflorescence terminal, center of leafy rosette




0 to 0 cm 0 to 0 cm
Bract



triangular
1.7 to 0.0 cm 0.8 to 0.0 cm
Appendage




0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole



tubular, split unilaterally
0.0 to 0.0 cm 0.0 to 0.0 cm
Flower yellow, 3-4 located at the cener of the rosette (Lock- 6-12 flowers one at a time



subsessile
0 to 0 cm 0 to 0 cm
Calyx


membranaceous
obliquely truncate
2.0 to 3.0 cm 0.0 to 0.0 cm
Corolla lobes acuminate
yellow


tubular
2.5 to 4.5 cm 0.0 to 0.0 cm
Labellum longer than corolla
yellow



0.0 to 0.0 cm 0.0 to 0.0 cm
Stamen thecae 4.5-7 mm




0.0 to 0.0 cm 0.0 to 0.0 cm

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