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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 3604 ".
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Costus maculatus

Costus maculatus Roscoe



Accession # R2258 identified as Costus maculatus from Le Jardin Ombragé
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Photo# 12313 Specimen# R0
Costus maculatus syn. of C. dubius,


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Photo# 15221 Specimen# R0
Costus maculatus compared to Costus dubius


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Photo# 11204 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671


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Photo# 11205 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671


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Photo# 11206 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - leaves from basal shoot


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Photo# 11207 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - inflorescence cone


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Photo# 11208 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - flower parts


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Photo# 11209 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - bracts


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Photo# 11210 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - bracts


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Photo# 11211 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - labellum


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Photo# 11212 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - labellum


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Photo# 11213 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - corolla lobes


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Photo# 11214 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - bracteole and 2 calyx


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Photo# 11215 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - bracteole and 2 calyx


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Photo# 11216 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - calyx


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Photo# 11217 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - stamen


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Photo# 11218 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - stamen


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Photo# 11219 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - stamen


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Photo# 11220 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - style


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Photo# 11221 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - stamen and labellum


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Photo# 11222 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - flowers


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Photo# 11223 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - labellum


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Photo# 11224 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - flowers


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Photo# 11225 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - labellum


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Photo# 11226 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - basal inflor.


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Photo# 11227 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - flowers


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Photo# 11228 Specimen# R2258
Costus maculatus syn. of C. dubius,


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Photo# 11229 Specimen# R2258
Costus maculatus syn. of C. dubius, ligule


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Photo# 11230 Specimen# R2258
Costus maculatus syn. of C. dubius,


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Photo# 11231 Specimen# R2258
Costus maculatus syn. of C. dubius, bract, bracteole, calyx


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Photo# 11232 Specimen# R2258
Costus maculatus syn. of C. dubius, bracteoles, calyx


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Photo# 11233 Specimen# R2258
Costus maculatus syn. of C. dubius, bracteoles, calyx


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Photo# 11234 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - ligule


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Photo# 11235 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 - sheaths


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Photo# 11236 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 -


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Photo# 12416 Specimen# R2258
Costus maculatus syn. of C. dubius, USBRG#94-671 -


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Photo# 12699 Specimen# R0
Costus maculatus syn. of C. dubius, at Dave Skinner at Lyon Arboretum, Oahu, Hawaii Arboretum, Oahu, Hawaii


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Photo# 12700 Specimen# R0
Costus maculatus syn. of C. dubius, at Lyon Arboretum, Oahu, Hawaii


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Photo# 12701 Specimen# R0
Costus maculatus syn. of C. dubius, at Lyon Arboretum, Oahu, Hawaii


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Photo# 12702 Specimen# R0
Costus maculatus syn. of C. dubius, at Lyon Arboretum, Oahu, Hawaii


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Photo# 11237 Specimen# R0
Costus maculatus syn. of C. dubius, from Tom Wood's prints William Roscoe print


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Photo# 12417 Specimen# R0
Costus maculatus syn. of C. dubius,


BOTANICAL NAME: Costus maculatus
SUBGENUS:
GROUP:
SECTION:
PRIMARY SOURCE USED FOR DESCRIPTION:Koechlin - Flore du Gabon, Flora du Cameroun, 1965
SECONDARY SOURCES:
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:KOECHLIN KEY: Plants with upright stems, with many leaves arranged along the stem, or grouped toward the top. Radical inflorescence (per description, sometimes terminal on leafy stem). Leafy stem is over 1 meter high sometimes with many flowers, plants are glabrous. Flowers white, more or less marked with pink or yellow. Two flowers per bract, labellum is white, marked with pink.

The photos are all from a specimen at the Smithsonian (USBRG#94-671) that has been identified as Costus maculatus. It generally appears to match the Koechlin description, except for the longer, lobed ligules, and the marking on the labellum is yellow - not pink. The main question is the key characteristic of two flowers per bract. My photos of the flowers (photos #7625 and #7628) appear to be from separate bracts, but upon close examination there are two calyx for each bract. The specific epiphet probably refers to the markings on the sheaths.
NATURAL DISTRIBUTION:Sierre-Leone, Cameroun, Gabon
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




0 to 0 cm0 to 0 cm
Sheath
green
glabrous


0 to 0 cm 7 to 10 mm
Ligule
green
glabrous

truncate, undulating
2 to 5 mm 0 to 0 mm
Petiole
green
glabrous


0 to 5 mm 0 to 0 mm
Leaf line of hairs on margin of leaf



oblanceolees
0 to 17 cm 0 to 6 cm
...upper
green
glabrous




...under
green
glabrous




...base



cunate-rounded


...apex



long acuminate
5 to 15 mm
Inflorescence Basal - Begns normally directly from rhizome (radical) on 30-50 cm peduncle



ovoid
0 to 0 cm 3 to 5 cm
Bract



ovales
0.0 to 2.0 cm 0.0 to 0.0 cm
Appendage




0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole bracteole with each flower



unicarenee et munie at the apex thickened callus
0.0 to 0.0 cm 0.0 to 0.0 cm
Flower 2 flowers per bract




0 to 0 cm 0 to 0 cm
Calyx
green
glabrous

tridente
1.0 to 1.5 cm 0.0 to 0.0 cm
Corolla
white



0.0 to 0.0 cm 0.0 to 0.0 cm
Labellum
white marked with pink at apex



0.0 to 5.0 cm 0.0 to 0.0 cm
Stamen




0.0 to 0.0 cm 0.0 to 0.0 cm

Copyright © 2003-2015 - Dave Skinner, GingersRus.com
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