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

Gingersrus Database Taxon ID 3725

Costus dirzoi


OLD NAME: Costus dirzoi

NEW NAME: Costus dirzoi

NAME CHANGE NOTES:

FULL SCIENTIFIC NAME: Costus dirzoi Garc?a-Mend. & G.Ibarra

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 dirzoi is an accepted species of neotropical Costus described in 1991 by Abisai Garcia-Mendoza and G. Ibarra in the Annals of the Missouri Botanical Garden, Vol. 78, No. 4 (1991), pp. 1081-1084. The inflorescence and flower looks similar to Costus pictus but it is a more compact plant that flowers both terminally on a leafy shoot and at the base on a separate shoot. It is distinguished by the shape of the leaves and the velutinous covering on the undersides of the leaves.

The type specimen was collected in 1989 at the Estación de Biología Tropical Las Tuxtlas in Veracruz, Mexico and the species in endemic to that region of Mexico. In August 2018 I visited the area and spoke with Rosamonda Coates, the biology director at Las Tuxtlas, who told me that Costus dirzoi flowers only at the end of the dry season in May and as the rains first start in the rainy season in June. The species is endemic to that part of Veracruz, and I saw it in a few other places around the Laguna Catemaco.

I had had my doubts about its status as a species distinct from Costus pictus, but a sample was extracted for DNA and Costus dirzoi was found to be in a clade well separated from C. pictus, but close to the sp. nov. C. mollissimus, which has appendaged bracts.

HORTICULTURAL NOTES:
Based on information at the Botanic Gardens Conservation International (BGCI) this species is in ex situ cultivation at 9 botanical gardens world wide. I have found this species to be relatively easy to grow in my garden and greenhouses at Le Jardín Ombrage and potentially winter hardy here.

ACCESSIONS:Click links (if any) to see details of individual collections. R3408- R3448- R3449-


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Photos (if available) of Taxon ID 3725
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Costus dirzoi type specimen - Click to see full sized image
Photo# 481 Accession# R0
Costus dirzoi type specimen


Costus dirzoi, terminal inflorescence, photo from Skinner R3448, at type locality Los Tuxtlas, Veracruz, Mexico - Click to see full sized image
Photo# 198 Accession# R3448
Costus dirzoi, terminal inflorescence, photo from Skinner R3448, at type locality Los Tuxtlas, Veracruz, Mexico


Costus dirzoi, basal inflorescence, photo from Skinner R3448, at type locality Los Tuxtlas, Veracruz, Mexico - Click to see full sized image
Photo# 199 Accession# R3448
Costus dirzoi, basal inflorescence, photo from Skinner R3448, at type locality Los Tuxtlas, Veracruz, Mexico