Gingersrus Database Taxon ID 7848
OLD NAME: Costus pictus form with stamen exceeding labellum, exposing thecae, corolla lobes curled outward
NEW NAME: Costus pulverulentus
NAME CHANGE NOTES: believed to be the form of the type from Nicaragua
FULL SCIENTIFIC NAME:
STATUS : distinct form
FIELD OBSERVATIONS:(If field observations are available, you can click on the link to open in a new window.)
PHOTOS:(If photos are available, you can click on the link to open in a new window.)
This is the form most recognized for this species, and I believe based on my research of Haenke's voyage that he collected the type in Nicaragua and that it was in this form. I have not seen the herbarium holotype from Haenke's collection, but I doubt it would shed much light on the form he collected as it would not show the form of the flowers. I believe this was collected when his vessel landed at Realejo (now Corinto) and explored inland to a volcano he called "VolcÃ¡n Viejo" which is now called the San Cristobal Volcano. You can read my notes on this research HERE.
The oldest collection I have found for this form is the one that was collected by JosÃ© Celestino Mutis during his âNew Granadaâ expedition that began in 1783, so that collection might precede the Haenke collection. I found a photo of the specimen originally from Madrid and the Mutis illustration clearly shows a flower with the corolla lobes curled outwards and with the stamen fully exposed beyond the labellum. It does differ by showing green bracts instead of red bracts, which I am guessing to be in error, although some examples from Colombia do have green bracts.
A partial phylogeny was completed by Eugenio Valderrama and his associates in the Chelsea Specht Lab at Cornell University and was published in the journal Frontiers in Plant Science in September 2022. This form is well represented by sampling in the molecular phylogeny and forms a well supported clade.