Hyperbaena hassleri is a species of flowering plant in the family Menispermaceae. It is a climbing plant with leathery leaves, greenish-yellow male flowers, and obovoid fruits. The species is native to Argentina, Bolivia, Brazil, and Paraguay.
Hyperbaena hassleri was described in 1910.
Taxonomy The species was described by Ludwig Diels in 1910.
Distribution Hyperbaena hassleri is native to the seasonally dry tropical biome of north-east Argentina, Bolivia, south-east and west-central Brazil, and Paraguay. It grows in woodlands.
Description Hyperbaena hassleri is a slender climbing plant that grows up to long. The branches are cylindrical.
The leaves are leathery, ovate to broadly obovate, long, and wide. The margins are smooth, or rarely undulating. The leaf stems are long.
The male inflorescence is a solitary or clustered panicle that grows on a stem. The stems of male flowers are long. The male flowers are yellowish-green, and have six sepals in two groups. The outer sepals are narrowly ovate-lanceolate, around long, and around wide. The inner sepals are broadly ovate to elliptical, around long, and around wide. The male flowers have six obovate petals in two groups. The petals are around long, and around wide.
The female inflorescence is a slender raceme.
The fruit is obovoid, long, and wide.
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