Corsia acuminata
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| LOWilliams |
Corsia acuminata is a loose leaf green plant type from the family of Corsiaceae .
features
Like all species of the genus also has Corsia acuminata the photosynthesis abandoned and therefore forms no chlorophyll more. Instead, it lives myco-heterotrophically on a mycorrhizal fungus that lives in symbiosis with another plant.
Corsia acuminata is a perennial plant that only grows above ground during flowering. From the short, creeping rhizome , up to 25 centimeters long, cylindrical and finely grooved, unbranched and upright stems sprout. The 10 to 15 millimeters long, pointed leaves are reduced to divorced, five-veined scaly leaves ; the bracts are of a similar shape, but narrower.
The upright individual flowers are terminal and stand on 30 to 70 millimeter long flower stalks. Of the six petals (three tepals each in two petal circles ) five are ovate to linear-ovoid, 5 to 7 millimeters long and 1.3 to 2 millimeters wide, one-nerved, hairless, pointed and mostly oblique at the base. The uppermost sixth, the so-called Labellum is, broadly, garnet to dark brown yellow-rimmed elliptical to trapezoidal at the uppermost edge papillous enlarged and with 12 to 15 millimeters in length strong. It initially surrounds the flower bud and, after opening, covers the other flower organs protectively. On approach, the Labellum is a 4 to 5 millimeters long web of callus tissue on gynostemium grown ( "pinned"), on which an upright survey group; it is traversed by a midrib and by 5 or 6 branched parallel nerves on each side.
The gynostemium is 1 to 1.5 millimeters long; the free portion of the stamens reaches 1 millimeter in length. The anthers are yellow and also 1 millimeter long. The ovary is 15 to 20 millimeters long, the capsule fruit is hairless and 2.5 to 3 centimeters long.
Distribution area
Corsia acuminata was collected twice in the eastern part of New Guinea (region around Morobe ) at altitudes of 1400 and 1830 meters respectively.
Systematics
Corsia acuminata was first described by Louis Otho Williams in 1946 and belongs to the Unguiculatis section .
literature
Much of the information in this article has been obtained from the following sources:
- Pieter van Royen : Sertulum Papuanum 17. Corsiaceae of New Guinea and surrounding areas in: Webbia 27: 233-234, 1972