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SPECIMEN DESCRIPTION

This is a detailed botanical description of plant specimen(s) for this species measured and photographed.


ACCESSION #:
R2935

IDENTIFIED AS:
Costus bracteatus

LOCATION:
Le Jardin Ombragé

SOURCE:
Fairchild Tropical Gardens #94517 in the conservatory, where it is incorrectly tagged as Costus allenii.

DETERMINATION:
By Dave Skinner. Looks similar to the plant pictured by Kathleen Kay as C. bracteatus. Maas did not describe this species, saying there was insufficient information to distinguish it from other forms of Costus guanaiensis. Others have accepted it as a valid species and there is a description and key in the Manual de Plantas de Costa Rica which this plant matches based on available information..

GENERAL:
The foliage is striking and the inflorescense of the specimen at Fairchild are pendent rather than upright, a feature not often seen in Costus. All plant parts are extremely hairy. I have photographed and measured the parts available to me in a spent inflorescence received from this Fairchild plant.

RHIZOME :


SHEATH:
Green, villose

LIGULE:
Green, villose like sheath, over 1 cm long, truncate or shallow single lobe.

PETIOLE:
Green, hairy like sheath and ligule, slightly shorter than ligule.

LEAVES:
Green, plicate, hairy both sides.

INFLORESCENCE:
Terminal on a leafy stem

BRACTS:
Light green, pubescent, small callus, 3.5 cm long by 2.5 cm wide.

APPENDAGE:
Very long, triangular, darker green than bracts and distinctly separate, villose, foliaceus.

BRACTEOLE:
Light green, pubescent, 2.5 cm long by 0.6 cm wide.

CALYX:
Light green, pubescent, 1.5 cm long by 1.2 cm wide.

COROLLA:


LABELLUM:


STAMEN:


STIGMA:


OTHER:


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