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Costus Species Botanical Description Botanical Description page for GingersRus plant database number " 4317 ".
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Costus curvibracteatus

Costus curvibracteatus Maas



Accession # R3268 identified as Costus curvibracteatus from Parque Nacional Tapanti at 1300 m, along the bank of a creek
Accession # R2973 identified as Costus curvibracteatus from Parque Purisil at 1364 m altitude, Costa Rica
Accession # R3032 identified as Costus curvibracteatus 'Pocosol' from Poco Sol area, Tilaran Mountains, Costa Rica, about 800 meters
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Photo# 15323 Specimen# R0
Costus curvibracteatus - Carla Black Garden


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Photo# 15324 Specimen# R0
Costus curvibracteatus - Carla Black Garden


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Photo# 15325 Specimen# R0
Costus curvibracteatus - Carla Black Garden


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Photo# 15326 Specimen# R0
Costus curvibracteatus - Carla Black Garden


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Photo# 15327 Specimen# R0
Costus curvibracteatus ligule - Parque Nacional Tapanti, Costa Rica


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Photo# 15328 Specimen# R0
Costus curvibracteatus bracts - Parque Nacional Tapanti, Costa Rica


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Photo# 15329 Specimen# R0
Costus curvibracteatus bracteole and calyx- Parque Nacional Tapanti, Costa Rica


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Photo# 15330 Specimen# R0
Costus curvibracteatus - Parque Nacional Tapanti, Costa Rica


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Photo# 15331 Specimen# R0
Costus curvibracteatus small flower- Parque Nacional Tapanti, Costa Rica


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Photo# 15332 Specimen# R0
Costus curvibracteatus stamen - Parque Nacional Tapanti, Costa Rica


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Photo# 15333 Specimen# R0
Costus curvibracteatus flower parts - Parque Nacional Tapanti, Costa Rica


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Photo# 15334 Specimen# R2973
Costus curvibracteatus - Rio Purisil, Costa Rica


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Photo# 15335 Specimen# R2973
Costus curvibracteatus - Rio Purisil, Costa Rica


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Photo# 15336 Specimen# R2973
Costus curvibracteatus - Rio Purisil, Costa Rica


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Photo# 15337 Specimen# R3134
Costus curvibracteatus - Cerro Gaital Panama


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Photo# 15338 Specimen# R3142
Costus curvibracteatus - La Fortuna, Panama


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Photo# 15339 Specimen# R3142
Costus curvibracteatus - La Fortuna, Panama


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Photo# 15340 Specimen# R3184
Costus curvibracteatus - John Mood Garden


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Photo# 15341 Specimen# R3184
Costus curvibracteatus - John Mood Garden


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Photo# 15342 Specimen# R3184
Costus curvibracteatus - John Mood Garden


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Photo# 15343 Specimen# R3184
Costus curvibracteatus flower parts, two different flower types - John Mood Garden


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Photo# 15344 Specimen# R3184
Costus curvibracteatus, two different flower types - John Mood Garden


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Photo# 15345 Specimen# R3184
Costus curvibracteatus - John Mood Garden


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Photo# 15346 Specimen# R3184
Costus curvibracteatus - John Mood Garden


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Photo# 15347 Specimen# R3184
Costus curvibracteatus - John Mood Garden


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Photo# 15348 Specimen# R3184
Costus curvibracteatus - John Mood Garden


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Photo# 15349 Specimen# R3243
Costus curvibracteatus flower parts - Cerro Gaital, Panama


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Photo# 15350 Specimen# R3243
Costus curvibracteatus flower - Cerro Gaital, Panama


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Photo# 15351 Specimen# R3243
Costus curvibracteatus flower parts - Cerro Gaital, Panama


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Photo# 15352 Specimen# R3243
Costus curvibracteatus bracteole and calyx - Cerro Gaital, Panama


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Photo# 15353 Specimen# R3243
Costus curvibracteatus bracteole - Cerro Gaital, Panama


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Photo# 15354 Specimen# R3243
Costus curvibracteatus (red bracts) Cerro Gaital, Panama


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Photo# 15355 Specimen# R3243
Costus curvibracteatus (red bracts) Cerro Gaital, Panama


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Photo# 15356 Specimen# R3243
Costus curvibracteatus (red bracts) Cerro Gaital, Panama


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Photo# 15357 Specimen# R0
Costus curvibracteatus ligule, Santa Fe, Panama


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Photo# 15358 Specimen# R0
Costus curvibracteatus, Santa Fe, Panama


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Photo# 17895 Specimen# R3367
Costus curvibracteatus at type locality, Tapantí


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Photo# 17896 Specimen# R3367
Costus curvibracteatus at type locality, Tapantí


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Photo# 17897 Specimen# R3367
Costus curvibracteatus at type locality, Tapantí


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Photo# 17898 Specimen# R3367
Costus curvibracteatus at type locality, Tapantí


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Photo# 17899 Specimen# R3367
Costus curvibracteatus at type locality, Tapantí - ligules


BOTANICAL NAME: Costus curvibracteatus
SUBGENUS:Costus
GROUP:2-bracts not appendaged
SECTION:II-Ornithophilus
PRIMARY SOURCE USED FOR DESCRIPTION:Maas, Flora Neotropica No. 18, 1977
SECONDARY SOURCES:Manual de Plantas de Costa Rica Vol II, 2003, Missouri Botanical Garden
LAST UPDATED:
NOTES AND DISTINGUISHING CHARACTERISTICS:Described and named by Maas in Flora Neotropica No. 18. Maas says this species is distinguished by it's slightly patent bracts, which are distinctively incised at the apex, at least in herbarium specimens. This plant has some similar characteristics to C. barbatus, but has smaller ligule and glabrous corolla.

Maas said a similar plant, but with its infl on a separate leafless shoot, was collected in Panama. I saw this also, on display at Atlanta Botanic Gardens.

The plant common in the horticultural trade under the name Costus curvibracteatus is really Costus productus, and the photos have now been moved there. Chelsea Specht and Dr. Maas have reveiwed those pictures and indicated this plant is actually Costus productus. It differs from the description below in several respects:
1. Long lobed ligules
2. The indument on the leaves
3. The distinctive curvature INWARDS of the margins of the bracts.
SEE COSTUS PRODUCTUS (PID#3789)

The photos to the left are the only ones I have seen of Costus curvibracteatus, shown here with permission from Barry E. Hammil. This more closely matches the descripton and the type specimen. It has been collected many times in Costa Rica under the Instituto Nacional de Biodiversidad, Plants of Costa Rica project, exclusively on the Carribean slope (not the Pacific side).

The Manual de Plantas de Costa Rica says this species is characterized by its ligule with a red margin and bracts somewhat recurved and liberally extended, frequently colored "anaranjadas" with an indestinct callus. Furthermore, it is a species rather variable as its bracts can be from red to yellow and sometimes seem to have an appendage.

Manual de Plantas de Costa Rica also mentions a plant referred to as "Costus sp. 1" that is 1.5-3 m tall, leaves 35-48 X 9-14 cm, densely villose both sides, ligule 1-2.5 cm obliquely truncate, reflexed reddish margins, inflorescense on a separate leafless stem, ovoid or cylindrical, bracts white at base, red to orange, with yellow nectar callus, apex curved outwards, sharp (pointed?), red. Calyx 1-1.5 cm, corolla and labellum not known. This plant is found near the Arenal Volcano and near Puerto Viejo de Sarapiqui and is closest to C. curvibracteatus - but has the inflo on a separate leafless stem.
NATURAL DISTRIBUTION:In forests of Costa Rica and Panama, 650-1500 m
HEIGHT:1 to 3 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 20 cm
Sheath

densely hirsute


0 to 0 cm 12 to 20 mm
Liguleshort, 5-10 mm

hairy like sheaths

lobes rounded
5 to 10 mm 0 to 0 mm
Petiole

densely hirsute to strigose


5 to 15 mm 0 to 0 mm
Leaf Costa & margins often strigose



narowly elliptic to narrowly obovate
20 to 35 cm 6 to 10 cm
...upper

glabrous, ciliate




...under

densely hirsute-strigose




...base



cuneate to rounded


...apex



acute to acuminate
0 to 20 mm
Inflorescence terminal on a leafy stem.



ovoid to broadly ovoid
6 to 18 cm 3 to 9 cm
Bract apex curved outwards, callus absent or subobsolete, yellow
orange, red or yellowish
glabrous to densely stigose
thick, coriaceous
variable
4.5 to 5.0 cm 2.0 to 3.5 cm
Appendage none




0.0 to 0.0 cm 0.0 to 0.0 cm
Bracteole
red to reddish orange
sparsely strigulose

boat shape
1.8 to 2.8 cm 0.0 to 0.0 cm
Flower




0 to 0 cm 0 to 0 cm
Calyx 10-15 mm
red to reddish orange
sparsely strigulose

lobes shallowly triangular to deltate
1.0 to 1.5 cm 0.9 to 1.0 cm
Corolla tube 10mm
yellow to orange
glabrous


3.7 to 4.0 cm 0.0 to 0.0 cm
Labellum lateral lobes involute and forming a tube ca 10mm diam & 3-6 mm long
yellow tinged with orange


oblong-ovate
2.5 to 3.0 cm 2.0 to 2.2 cm
Stamen anther 9 mm by 5-6 mm
yellow tinged with orange


apex cucullate, rounded
2.8 to 3.5 cm 1.1 to 1.2 cm

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