Gingersrus Database Taxon ID 3838
OLD NAME: Costus plowmanii
NEW NAME: Costus plowmanii
NAME CHANGE NOTES:
FULL SCIENTIFIC NAME: Costus plowmanii Maas
STATUS : accepted
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Costus plowmanii is an accepted species of neotropical Costus described by Paul Maas in 1976. The type was from Colombia, El Valle near El Queremal at 1350 meters. The species was named after the famous botanist Tim Plowman who was with Dr. Maas when they collected the type specimen in 1974. It is described as a basal flowering plant growing to 3 meters tall, with red non-appendaged bracts and yellow tubular flowers. It is distinguished from similar species by the length of its ligule and its indumenta.
Costus plowmanii is known only from Colombia where it is found in the western provinces of Antioquia, ChocÃ³, NariÅ„o, Risaralda, and Valle del Cauca where it flowers mainly in the rainy season. I saw the plant in 2012 along the road to San Jose del Palmar in ChocÃ³, Colombia at about 1600 meters.
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. Costus plowmanii has been sampled for DNA and it was found to be in an unusual early but well-supported lineage in a clade by itself but close to a separate lineage containing Costus geothyrsus.
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