Corsia resiensis
| Corsia resiensis | ||||||||||||
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| Scientific name | ||||||||||||
| Corsia resiensis | ||||||||||||
| P.Royen |
Corsia resiensis is a loose leaf green plant type from the family of Corsiaceae .
features
Like all species of the genus also has Corsia resiensis the photosynthesis abandoned and therefore forms no chlorophyll more. Instead, it lives myco-heterotrophically on a fungus .
Corsia resiensis is a perennial plant that only grows above ground during flowering. It is completely light purple. A cylindrical stem that is up to 20 centimeters long and angular with four ribs then sprouts from the rhizome . The foliage is 11 to 15 millimeters long, pointed and seven-veined. The bracts are the same as the leaves.
The upright single flowers are terminal and stand on flower stalks that are 2.5 to 4 centimeters long, square and smooth in cross-section. Of the six petals (three tepals each in two petal circles) five are linear, blunt towards the tip, around 13 millimeters long and 1.3 millimeters wide, three-veined and smooth.
The top sixth, the so-called labellum , is heart-shaped, rounded at the tip and greatly enlarged (around 15 millimeters long and 11 millimeters wide), its base is heart-shaped. Eight or nine side ribs extend from the midrib to either side. The callus is triangular, heart-shaped, 3 millimeters long and wide and finely papillous , above it there is a finely papillous, only faintly visible thickening.
At the base, the labellum is directly fused with the approximately 0.5 millimeter long gynostemium . The free stamens are 1.5 millimeters long, the anthers 1.5 millimeters long. The style is 1 millimeter long, the ovary 7 to 9 millimeters long.
Distribution area
Corsia resiensis was only collected once in the western part of New Guinea in the Resi Mountains at an altitude of 250 m.
Systematics
Corsia resiensis was first described by Pieter van Royen in 1972. The species is closely related to Corsia ornata , Corsia wubungu and Corsia cyclopensis . Like this, it is placed in the sessilis section , since the labellum is directly fused with the gynostemium.
proof
- Pieter van Royen: Sertulum Papuanum 17. Corsiaceae of New Guinea and surrounding areas. In: Webbia. 27: 223-255, 1972