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Dimerocostus argenteus

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This plant was seen at Waimea Arboretum in Hawaii, their accession number 75S152 - According to their records they received seed from Tim Plowman in 1975, collected in Peru, Dept Ayacucho, Province La Mar, San Francisco, Rio Apurimar, alt 1900 feet (not meters). This places it at about 1237'30"S, 7347'10"W, and this location per Google Earth is 580 meters altitude = exactly 1900 feet.

The plant was identified by Paul Maas in 1975. I am growing it from a cutting, my number R3018. It has formed an inflorescence once, but I did not capture a flower photo then. The undersides of the leaves are slightly glaucus, which could be the "silvery sericeous lower surface" described by Maas. The most noticable character from this plant is the long stiff hairs around the ligule as shown in these photos. Note that this does NOT look like the drawing of D. argenteus in Flora Neotropica No 8 which has much shorter bract appendages, but Waimea records indicate it was identified by Maas as such. You can see the "cordate base" of the bract appendages in one of these photos. Also, there was another collection in Ayacuycho det'd by Maas to be this species.

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Copyright 2014 - Dave Skinner

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