Corsia pyramidata
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| Scientific name | ||||||||||||
| Corsia pyramidata | ||||||||||||
| P.Royen |
Corsia pyramidata is a loose leaf green plant type from the family of Corsiaceae .
features
Like all species of the genus also has Corsia pyramidata the photosynthesis abandoned and therefore forms no chlorophyll more. Instead, it lives myco-heterotrophically on a fungus .
Corsia pyramidata is a perennial plant that only grows above ground during flowering. From the rhizome sprouts an up to 28 centimeters long, pink to dark red-brown and cylindrical stem. The foliage is pointed, 9 to 12 millimeters long, five or seven-veined. The bracts are the same as the leaves, but always seven-veined.
The upright individual flowers are pale purple with dark purple stripes, terminal and are on flower stalks that are 1 to 2.5 inches long. Of the six petals (three tepals each in two petal circles) five are linear-ovoid, pointed, 9 to 14 millimeters long and 1.5 to 2.5 millimeters wide, three-veined and smooth.
The top sixth, the so-called labellum , is light pink to dark red-brown, egg-shaped to heart-shaped, pointed and greatly enlarged (10 to 14 millimeters long and 9 to 14 millimeters wide), its base is heart-shaped. From the midrib, five side ribs descend on each side. The callus is yellow or scarlet red, arrowhead to pyramidal, 4 to 5 millimeters long and 2.5 to 3 millimeters wide, pointed, protruding at its tip, irregularly notched at the edge and merges at its base with the base of the labellum. At the base of the lateral ribs, 14 to 16 papillary , lamellar secondary calluses emerge .
At the base, the labellum is directly fused with the approximately 0.5 millimeter long gynostemium . The free stamens are 1 millimeter long, the anthers 1.5 millimeters long. The ovary is 8 to 15 millimeters long.
Distribution area
Corsia pyramidata has been collected several times on mountains of the Solomon Islands , both on the island of Guadalcanal and on Kolombangara between 810 and 1830 meters.
Systematics
Corsia pyramidata was first described by Pieter van Royen in 1972 and is particularly close to Corsia haianjensis . Like this, it is placed in the sessilis section , since the labellum is directly fused with the gynostemium.
proof
- P. Van Royen: Sertulum Papuanum 17. Corsiaceae of New Guinea and surrounding areas. In: Webbia. 27: 223-255, 1972