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Datasheet for Costus talbotii

Plant Datasheet for Costus talbotii

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Costus talbotii at Smithsonian US Bot. Research Greenhouse, Washington, DC USBRG#96-280 - Click to see full sized image
Photo# 12027 Accession# R0
Costus talbotii at Smithsonian US Bot. Research Greenhouse, Washington, DC USBRG#96-280


Costus talbotii  basal flower - Click to see full sized image
Photo# 11992 Accession# R2711
Costus talbotii basal flower


Costus talbotii  basal flowers - Click to see full sized image
Photo# 11993 Accession# R2711
Costus talbotii basal flowers


Costus talbotii  lateral flowers - Click to see full sized image
Photo# 11994 Accession# R2711
Costus talbotii lateral flowers


Costus talbotii  lateral flower - Click to see full sized image
Photo# 11995 Accession# R2711
Costus talbotii lateral flower


Costus talbotii  terrminal flower - Click to see full sized image
Photo# 11996 Accession# R2711
Costus talbotii terrminal flower


Costus talbotii - Click to see full sized image
Photo# 11997 Accession# R2711
Costus talbotii


Costus talbotii - Click to see full sized image
Photo# 11998 Accession# R2711
Costus talbotii


Costus talbotii - Click to see full sized image
Photo# 11999 Accession# R2711
Costus talbotii


Costus talbotii  terminal flower - Click to see full sized image
Photo# 12000 Accession# R2711
Costus talbotii terminal flower


Costus talbotii  flower and bracteole - Click to see full sized image
Photo# 12001 Accession# R2711
Costus talbotii flower and bracteole


Costus talbotii  calyx - Click to see full sized image
Photo# 12002 Accession# R2711
Costus talbotii calyx


Costus talbotii  bracteole - Click to see full sized image
Photo# 12003 Accession# R2711
Costus talbotii bracteole


Costus talbotii  bracteole - Click to see full sized image
Photo# 12004 Accession# R2711
Costus talbotii bracteole


Costus talbotii  flower - Click to see full sized image
Photo# 12005 Accession# R2711
Costus talbotii flower


Costus talbotii  bracts - Click to see full sized image
Photo# 12006 Accession# R2711
Costus talbotii bracts


Costus talbotii  bracts - Click to see full sized image
Photo# 12007 Accession# R2711
Costus talbotii bracts


Costus talbotii  calyx and style - Click to see full sized image
Photo# 12008 Accession# R2711
Costus talbotii calyx and style


Costus talbotii  calyx and style - Click to see full sized image
Photo# 12009 Accession# R2711
Costus talbotii calyx and style


Costus talbotii  flower less calyx - Click to see full sized image
Photo# 12010 Accession# R2711
Costus talbotii flower less calyx


Costus talbotii  flower less calyx - Click to see full sized image
Photo# 12011 Accession# R2711
Costus talbotii flower less calyx


Costus talbotii  corolla lobes - Click to see full sized image
Photo# 12012 Accession# R2711
Costus talbotii corolla lobes


Costus talbotii  corolla lobes - Click to see full sized image
Photo# 12013 Accession# R2711
Costus talbotii corolla lobes


Costus talbotii  stamen, note sharply curved appendage - Click to see full sized image
Photo# 12014 Accession# R2711
Costus talbotii stamen, note sharply curved appendage


Costus talbotii  stamen - Click to see full sized image
Photo# 12015 Accession# R2711
Costus talbotii stamen


Costus talbotii  stamen - Click to see full sized image
Photo# 12016 Accession# R2711
Costus talbotii stamen


Costus talbotii  stamen, appendage straightened out - Click to see full sized image
Photo# 12017 Accession# R2711
Costus talbotii stamen, appendage straightened out


Costus talbotii  labellum - Click to see full sized image
Photo# 12018 Accession# R2711
Costus talbotii labellum


Costus talbotii  labellum - Click to see full sized image
Photo# 12019 Accession# R2711
Costus talbotii labellum


Costus talbotii  Ligule and sheath at leaf axil - Click to see full sized image
Photo# 12020 Accession# R2711
Costus talbotii Ligule and sheath at leaf axil


Costus talbotii  branching at leaf axil - Click to see full sized image
Photo# 12021 Accession# R2711
Costus talbotii branching at leaf axil


Costus talbotii  Ligule and sheath at leaf axil - Click to see full sized image
Photo# 12022 Accession# R2711
Costus talbotii Ligule and sheath at leaf axil


Costus talbotii  leaf - Click to see full sized image
Photo# 12023 Accession# R2711
Costus talbotii leaf


Costus talbotii - Click to see full sized image
Photo# 12024 Accession# R2711
Costus talbotii


Costus talbotii - Click to see full sized image
Photo# 12025 Accession# R2711
Costus talbotii


Costus talbotii - Click to see full sized image
Photo# 12026 Accession# R2711
Costus talbotii


Costus talbotii - Click to see full sized image
Photo# 12497 Accession# R2711
Costus talbotii


CLICK HERE for a detailed botanical description and identification key for this species (opens in new window).
CLICK HERE to see a description of accession #R2711 . (opens in new window).
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PLANT FAMILY: Costaceae
BOTANICAL NAME: Costus talbotii
FORMAL SCIENTIFIC NAME: Costus talbotii Ridl.
STATUS :Accepted
CONTINENT: African
SYNONYMS:


BOTANICAL NOTES:
This African species is recognized in Paul Maas' monograph on African Costaceae, published on 16 December 2016. (Monograph of African Costaceae, H. Maas-van de Kamer, P.J.M. Maas, J.J. Wieringa, C.D. Specht, Blumea 61, 2016: 280 - 318, http://www.ingentaconnect.com/content/nhn/blumea/2016/00000061/00000003/art00010)

The subgenus of this species is undetermined, but Chelsea Specht studied the molecular phylogeny of this species and found it to be in a clade (jackknife value 68%) with Costus lateriflorus, which is subgenus Metacostus. (Molecular Phylogenetics and Evolution 21:3, 333-345)

The African Plant Database lists this species as accepted. Epiphytic herb with ramose wiry stem covered with very long cylindrical ligules, reaching nearly to the next leaf
(Costus talbotii Ridl. Not determined to subgenus, Floral type is Caldaven, collection studied was from Cameroon, Kress herbarium voucher #99-6354 at USBRG #96-280, GenBank Accession No. AY041039a & AY041083b)
Note that Hutchinson & Dalziel - Flora of West Tropical Africa, 1936 stated that a collection in Cameroon (Zenker 3823) cited by Ridley is NOT the same species, so possibly this specimen from Cameroon is from the same plant.

Le Jardin Ombragé - Botanical description of specimen of Costus talbotii from horticultural trade. I have not seen a full description of this species, so I cannot verify its identification.

Flora of West Tropical Africa, (1936) - remarkable for very long ligule from one leaf right to the base of the next leaf and in having axillary inflos. S. Nigeria, mentions one in Camaroon that is "not the same species".

ACCESSION NOTES:
R2711 was received in trade from another nursery. This collection has been vouchered at the UC Berkeley, Jepsen Herbarium, UC2045796.

GINGERSRUS CATALOG LISTING:
Costus talbotii - flower Costus talbotii is another of the semi-epiphytic Costus species from Africa, sometimes found in the horticultural trade in the US under the common name "Blushing Spiral". It was not an included species in Schumann's " Das Pflanzenreich", but probably should be placed the same as C. lateriflorus in subgenus metacostus. Dr. Paul Maas is working on a monograph of the African Costus and told me he is placeing this species as one of the epiphytic types.

It can bloom either basally from the rhizome or laterally from the leaf axil. The stems, foliage and habit are very similar to Costus lateriflorus, but the flowers are quite different in color and shape - white with a pink blush and yellow markings on the labellum and not so tubular at the base as Costus lateriflorus.

I tested some of it outdoors one winter for hardiness, and as expected it did not survive even in our mild winter of 2005 here in zone 8B Tallahassee. I am guessing it would only be hardy zone 10, possibly zone 9B. It should be grown in warm, humid conditions year round if possible, in very loose, well drained soil of planting medium with light fertilization. I like to grow it in hanging baskets in my greenhouse over winter then outdoors in the summer.


Costus talbotii Costus talbotii Costus talbotii Costus talbotii - basal bloom Costus talbotii - lateral bloom

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