Mordazo Pipewort (Eriocaulon echinospermoideum)
This species is known only from the type material, which was found in the damp sand of a lagoon near the village of Mordazo in the Cuban Province of Villa Clara.
The plant reached a height of 2 to 3 cm.
The species was scientifically described in the year 1925, but, however, was never found again.
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References:
[1] R. Berazaín: The extinct Flora of Cuba. Bissea 3(2). 2009
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edited: 23.09.2017