Corsia merimantaensis
| Corsia merimantaensis | ||||||||||||
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| Scientific name | ||||||||||||
| Corsia merimantaensis | ||||||||||||
| P.Royen |
Corsia merimantaensis is a loose leaf green plant type from the family of Corsiaceae .
features
Like all species of the genus also has Corsia merimantaensis the photosynthesis abandoned and therefore forms no chlorophyll more. Instead, it lives myco-heterotrophically on a fungus .
Corsia merimantaensis is a perennial plant that only grows above ground during flowering. A cylindrical stem up to 25 centimeters long sprouts from the rhizome . The foliage is up to 20 millimeters long, pointed and five-nerved. The bracts are the same as the leaves.
The upright individual flowers are pale purple with dark purple stripes, terminal and are on flower stalks that are 1.5 to 2.5, as a fruit stalk up to 4.5 centimeters long and smooth. Of the six petals (three tepals each in two petal circles) five are ovate-linear, blunt, 10 to 15 millimeters long and 1.5 to 2 millimeters wide, three or five nerved and smooth.
The uppermost sixth, the so-called labellum , is brown to brown-purple, heart-shaped, pointed, smooth and greatly enlarged (12 to 18 millimeters long and 7 to 10 millimeters wide), its base is heart-shaped. Six side ribs descend from the midrib on each side. The callus is oblong-round, 3 millimeters long and 1.2 millimeters wide, with two tips and a finely bristly hairy edge. Six to eight lamellar additional calluses with hairy roots extend from the callus.
At the base, the labellum is directly fused with the approximately 1 millimeter long gynostemium . The free stamens are 1 millimeter long, the creamy white anthers 1.5 millimeters long. The creamy white stylus is 1.5 millimeters, the black stippled ovary 12 to 18 millimeters long.
Distribution area
Corsia merimantaensis was collected in Papua New Guinea at an altitude of 2280 m in Porget , a few kilometers north of Wabag .
Systematics
Corsia merimantaensis was first described by Pieter van Royen in 1972 and is particularly close to Corsia lamellata , Corsia huonensis and Corsia ornata . Like this, it is placed in the sessilis section , since the labellum is directly fused with the gynostemium.
literature
- P. Van Royen: Sertulum Papuanum 17. Corsiaceae of New Guinea and surrounding areas. In: Webbia. 27: 223-255, 1972