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

Gingersrus Database Taxon ID 4041

Chamaecostus congestiflorus


OLD NAME: Chamaecostus congestiflorus

NEW NAME: Chamaecostus congestiflorus

NAME CHANGE NOTES:

FULL SCIENTIFIC NAME: Chamaecostus congestiforus (Rich. ex L.F.Gagnep.) C.D.Specht & D.W.Stev.

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:
- Costus congestiflorus Rich. ex L.F.Gagnep. (1902) - Costus congestiflorus Rich. ex L.F.Gagnep. var. ß glabrior K.Schum. (1904)

BOTANICAL NOTES:
This species was first described in 1902 and Schumann placed in subgenus Eucostus in Das Pflanzenreich IV, 1904. It was described as a species of subgenus Cadalvena by Dr. Paul Maas in 1972. In 2006 it was changed to the new genus Chamaecostus but was not included in the sample plants analyzed for its phylogeny. Thiago Andre published results of phylogeny of Chamaecostus in 2015. C. congestiflorus was in a clade with other Chamaecostus, but basal to the group along with C. fragilis.

C. congestiflorus is described as having white flowers with a fimbriate labellum and hairy petals. It is distinguished from a proposed sp. nov., Chamaecostus manausensis. Chamaecostus congestiflorus is common in French Guiana where there is significant rainfall with a drier season in September and October. It flowers during the rainy season with peak flowering in third and fourth months of the rainy season.

I have never seen this species myself, and to my knowledge it is not in cultivation but there are two field observations posted on Inaturalist, both from French Guiana.

HORTICULTURAL NOTES:
Based on information at the Botanic Gardens Conservation International (BGCI) this species is in ex situ cultivation at only 1 botanical garden world wide.

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


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Photos (if available) of Taxon ID 4041
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Chamaecostus congestiflorus, photo from floredeguyane.piwigo.com - Click to see full sized image
Photo# 1 Accession# R0
Chamaecostus congestiflorus, photo from floredeguyane.piwigo.com


Chamaecostus congestiflorus, photo Maas  U0992695 - Click to see full sized image
Photo# 2 Accession# R0
Chamaecostus congestiflorus, photo Maas U0992695


Chamaecostus congestiflorus, photo Maas  FG Cacao 23-2-2003 U0992700 - Click to see full sized image
Photo# 3 Accession# R0
Chamaecostus congestiflorus, photo Maas FG Cacao 23-2-2003 U0992700