Gingersrus Database Taxon ID 7503
OLD NAME: Costus fissicalyx
NEW NAME: Costus fissicalyx
NAME CHANGE NOTES:
FULL SCIENTIFIC NAME: Costus fissicalyx N. R. Salinas, Clavijo & Betancur
STATUS : accepted
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GOOGLE PHOTO ALBUM
Costus fissicalyx is an accepted species of neotropical Costus that was described in 2007 by N. R. Salinas, Clavijo and Betancur in Caldasia vol.29 no.2 BogotÃ¡ July/Dec. 2007. This is superficially similar to Costus pulverulentus, with red bracts and tubular flowers with the stamen far exceeding the labellum and corolla, but the flowers are yellow instead of red. The authors distinguish it from other species by the unusual calyx: "CÃ¡liz gamosÃ©palo [sepals united], 10-14 mm de largo, 5-6 mm de diÃ¡metro, ciatiforme, glabro a piloso, membranÃ¡ceo, blanquecino, oculto por las brÃ¡cteas; lÃ³bulos reducidos a un pequeÅ„o mucrÃ³n de menos de 1 mm de largo [apparently this calx does not have the typical three deltate lobes], margen pobre e irregularmente ciliada, callo nectarÃfero ausente; el botÃ³n floral al desarrollarse rompe el cÃ¡liz lateralmente dejando una abertura de 6-8 mm de longitud [the calyx split down the side]." They do not mention the very unusual bullate (bumpy) texture of the leaves, but that trait is shown in their own photos and a photo posted by Nelson Pinilla Moreno as shown below (used with his permission).
It is only known from eastern Amazonian parts of Colombia near the type locality along the Rio Apaporis and Rio CaquetÃ¡ near the Brazilian border. I have not been to this region yet and have not seen this species other than in photos.
Members of the revision team at Cornell University are working to obtain a sampling for DNA extraction, but it has not yet been included in a molecular phylogeny.
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