Kadua cookiana
| Kadua cookiana | ||||||||||||
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| Scientific name | ||||||||||||
| Kadua cookiana | ||||||||||||
| Cham. & Schltdl. |
Kadua cookiana is a plant from the genus Kadua in the family of the Rubiaceae (Rubiaceae). It is endemic to Hawaii .
description
Vegetative characteristics
Kadua cookiana grows as a small, multi-branched shrub with grooved trunks between 0.1 and 0.2 meters long. All shoots are bare.
The constantly against arranged on the branches leaves are divided into a petiole and leaf blade. The petiole is 0 to 0.5 inches long. The simple, paper-like leaf blade is linear with a length of 4 to 8 centimeters and a width of around 0.05 to 0.12 centimeters. The spreading edge, which is slightly bent back, is entire. Several indistinct lateral nerves branch off from each side of the leaf median nerve. The stipules are reduced to a keeled spike tip. They grow together with the base of the petiole and thereby form a leaf sheath . The linear-awl spike tip is 0.2 to 0.5 inches long.
Generative characteristics
The zymous inflorescences are glabrous or finely hairy. The inflorescences contain three to seven single stalked flowers. The flower stalks are 0.8 to 1.5 centimeters long, with the flower stalk of the middle single flower being the longest.
The four-fold flowers are radial symmetry . The top-shaped flower cup is about 1.5 millimeters long. The sepals are fused together to form a calyx tube. The calyx lobes are linear-triangular with a length of 4 to 6 millimeters and a width of 1.5 to 2 millimeters. The white and fleshy petals are fused together like a saucer. The corolla tube reaches a length of 0.8 to 0.9 centimeters and has an approximately square cross-section. The four crown lobes reach lengths of about 0.2 centimeters.
The capsule fruits are top-shaped with a length of 0.3 to 0.35 centimeters and a thickness of 0.35 to 0.4 centimeters. The endocarp is somewhat lignified. Each of the fruits contains several reddish brown seeds. They are irregularly wedge-shaped and somewhat compressed.
Occurrence and endangerment
The natural range of Kadua cookiana is on some islands belonging to Hawaii . Kadua cookiana is endemic to the islands of Hawai'i and Kaua'i .
Kadua cookiana thrives at least on Kauaʻi at altitudes of 244 to 366 meters. The species grows there on damp rocky cliffs, especially near waterfalls. Associated species include Bidens forbesii , Boehmeria grandis , Carex wahuensis , Hibiscus kokio , Kadua elatior , Machaerina angustifolia and Psydrax odorata .
Kadua cookiana is classified as "Endangered" in the IUCN Red List . Displacement by invasive species and landslides are named as the main reasons for endangerment. The total stock, which consists of around 100 fully grown plants divided into two populations , is viewed as declining.
Taxonomy
It was first described as Kadua cookiana in 1829 by Adelbert von Chamisso and Diederich Franz Leonhard von Schlechtendal in Linnaea .
Individual evidence
- ↑ a b c d e f Kadua cookiana. In: Flora of the Hawaiian Islands. www.botany.si.edu/pacificislandbiodiversity/hawaiianflora, accessed on January 2, 2017 (English).
- ↑ a b Kadua cookiana in the endangered Red List species the IUCN 2016 Posted by: DH Lorence, 2016. Retrieved on January 2 2017th
- ^ Kadua cookiana at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 2, 2017.