Kadua foliosa
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| Kadua foliosa | ||||||||||||
| Hillebr. |
Foliosa Kadua is an extinct species from the genus Kadua in the family of the Rubiaceae (Rubiaceae). It was endemic to Hawaii .
description
Vegetative characteristics
Kadua foliosa grew as a small, spreading shrub . The grooved trunks had a handle-round cross section and were bare.
The opposite continuously arranged on the branches leaves were in a petiole and leaf blade divided. The petiole was very short and the leaf blade was almost sessile. The simple, thin and paper-like leaf blade was 1 to 4.5 centimeters long and about 1.4 to 1.8 centimeters wide from ovoid to lanceolate. The top of the leaf blade was glabrous while the underside was sparsely hairy. The base of the spade was wedge-shaped or rounded, the tip of the spreader was pointed and the edge of the spreader had the entire margin. Several side veins branched off from each side of the central leaf vein, and the higher-order leaf veins formed an inconspicuous network-like pattern. The stipules resembled the foliage leaves, were fused with the base of the petiole and thus formed a finely hairy and prickly-tipped leaf sheath . The keeled leaf sheath was 0.2 to 0.3 inches long and had a short spiked tip.
Generative characteristics
The narrow zymous inflorescences were arranged crosswise on a slender, approximately 0.6 to 1 centimeter long peduncle. The inflorescences contained several single stalked flowers. The flower stalks were about 0.2 to 0.5 inches long.
The four-fold flowers were radial symmetry . The top-shaped flower cup was around 1 millimeter long. The sepals were fused together to form a calyx tube. The calyx lobes were about 2 to 3 millimeters long and about 0.6 to 0.8 millimeters wide. The fleshy and blue petals were fused together in the shape of a saucer and their flower color is not known. The corolla tube reached a length of 0.6 to 1.2 centimeters and had a square cross-section. The four crown lobes reached lengths of about 0.4 centimeters. The weak bilobe pen was hairy densely woolly in its lower half.
The young capsule fruits were more or less spherical in shape, each around 0.3 centimeters in length and diameter. The endocarp was lignified. Each of the fruits contained several almost black seeds. They were irregularly shaped like a shield and the seed coat was scarred.
Occurrence
The natural range of Kadua foliosa was on the Hawaiian island of Maui . The species grew there on the southwest slopes of Haleakalā .
Taxonomy
The first description as Kadua foliosa was in 1888 by Wilhelm Hillebrand in Flora of the Hawaiian Islands . A synonym for Kadua foliosa Hillebr. is Hedyotis foliosa (Hillebr.) Fosberg .
Individual evidence
- ↑ a b c d e f g Kadua foliosa. In: Flora of the Hawaiian Islands. www.botany.si.edu/pacificislandbiodiversity/hawaiianflora, accessed on January 22, 2017 (English).
- ^ Kadua foliosa at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 22, 2017.