This page contains photos and description of a species, form or cultivar of Costaceae.

Gingersrus Database Taxon ID 3516

Costus osae


OLD NAME: Costus osae

NEW NAME: Costus osae

NAME CHANGE NOTES:

FULL SCIENTIFIC NAME: Costus osae Maas & H.Maas

STATUS : accepted

CONTINENT: Neotropical

FIELD OBSERVATIONS:(If field observations are available, you can click on the link to open in a new window.)
FIELD OBSERVATIONS

PHOTOS:(If photos are available, you can click on the link to open in a new window.)
GOOGLE PHOTO ALBUM

SYNONYMS:


BOTANICAL NOTES:
Costus osae has been considered to be endemic to the Osa Peninsula area of Costa Rica, but a few collections of this species have been recorded now in distant areas of Colombia and Ecuador. The Colombian collections were all around the area of Mun. Mutatá and I have requested local assistance in photographing the living plants. The Ecuadorian collections were listed by Maas as "aff. osae" on the specimen tags, from Selby Botanical Garden and Rio Palenque Science Center - possibly are not native there. Phylogenetic sampling is needed to investigate the evolutionary lineage of this species in its different regions. The species flowers only in the rainy season.This is an accepted neo-tropical Costus species described in 1997 by Paul and Hiltje Maas. It grows to about 1 meter tall with broad, felty leaves mostly gathered to the top of the plant. The inflorescence is terminal on a leafy stem, with bright red appendaged bracts and small tubular flowers that are almost hidden by the bracts, and camouflaged by being a matching color. This species and Costus ricus are the only species of Costus that have a bicarinate (two-keeled) bracteole, shaped more or less like a flat-bottom boat instead of the typical canoe-shaped bracteole of Costus species. (NOTE: I found one population of Costus arabicus in Guyana that also has the bicarinate bracteole.)

This species has sometimes been sold under the cultivar name 'Red Rose'. Cultivar published in the Heliconia Society Quarterly Bulletin, Vol. 20, No. 1, March, 2014.

The type was collected on Cerro Brujo along the Quebrada Vaquedano, Osa Peninsula of Costa Rica and the species is endemic to that area. I have seen it several places in the northern part of the peninsula and in the Parque Nacional Piedra Blancas across the Golfo Dulce from the peninsula. It seems to grow only in rocky soil along creeks, but there are usually in large numbers in the places where they are found. It is fairly consistent in appearance with slight differences in the flower color.

Maas described in Brittonia 49(2): 274-279. 1997.
Specimens collected on Osa Peninsula, Costa Rica.
http://www.mobot.org/manual.plantas/041817/S041898.html -
Barry Hammel 18255
Det. by: B. Hammel, III 1993
Phenology: FL 30 June 1991
08:43N 83:34W 200 m
PUNTARENAS, OSA R.F. Golfo Dulce
Península de Osa.
Hierba de ca. 50 cm; bracteas rojizo
anaranjado, los apices recurvados.


HORTICULTURAL NOTES:
Based on information at the Botanic Gardens Conservation International (BGCI) this species is in ex situ cultivation at 19 botanical gardens world wide. I have found this species to be relatively easy to grow in my garden and greenhouses at Le Jardín Ombrage. In cultivation Costus osae has sometimes been sold under the cultivar name 'Red Rose'. Cultivar published in the Heliconia Society Quarterly Bulletin, Vol. 20, No. 1, March, 2014. It is not winter hardy in areas with frost, but makes a nice showy compact landscape plant.

ACCESSIONS:Click links (if any) to see details of individual collections. R2566- R3155-


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Photos (if available) of Taxon ID 3516
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Photo# 272 Accession# R0


Costus osae showing bracteole, photo from Skinner, cultivated plant - Click to see full sized image
Photo# 273 Accession# R0
Costus osae showing bracteole, photo from Skinner, cultivated plant


Costus osae showing inflorescence and, photo from Skinner, cultivated plant - Click to see full sized image
Photo# 274 Accession# R0
Costus osae showing inflorescence and, photo from Skinner, cultivated plant


Costus osae showing stem and ligule, photo from Skinner, cultivated plant - Click to see full sized image
Photo# 275 Accession# R0
Costus osae showing stem and ligule, photo from Skinner, cultivated plant