Hoya nummularioides
| Hoya nummularioides | ||||||||||||
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Original illustration from Costantin (1912: Fig. 17, 7 = pollinarium, 8 = pollinium with transparent outer edge, 9 = corolla from below, 11 = gynostegium, 12 = knot with inflorescence) |
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| Scientific name | ||||||||||||
| Hoya nummularioides | ||||||||||||
| Costantin |
Hoya nummularioides is a plant of the genus of wax flowers ( Hoya ) of the subfamily of asclepiadoideae (Asclepiadoideae).
features
Hoya nummularioides is an epiphytic , creeping plant with up to 2 m long shoots that becomes bushy with age. The shoots have a diameter of 3 mm and are downy hairy. The leaves are stalked, the thick stalks are 2 to 5 mm long and lightly downy hairy. The fleshy, slightly downy-haired leaf blades are circular to ovate, up to 45 mm long and up to 25 mm wide. The apex is pointed, the base is rounded. They are light green with darker edges. The leaf nerve is not recognizable.
The umbellate inflorescence has 12 to 24 flowers. The peduncle is 1.5 to 3 cm long and slightly downy hairy. The thin flower stalks are 6 to 10 mm long and hairy slightly downy. The sepals are egg-shaped, bluntly tapering and slightly downy hairy. The white to pink corolla has a diameter of 7 mm. The petal lobes are triangular, strongly bent back apically and slightly downy-haired inside. The secondary crown is dark pink with egg-shaped tips. The outer process is pointed and somewhat lighter, the inner process is pointed and apically white. The stamen process is very short. The stylus head is conical and very small. The scent of the flowers is fragrant.
The pollinia are strongly flattened. The caudiculae are small. The follicle is cylindrical, slightly curved and tapering to a point.
Geographical distribution and habitat
The distribution area extends from Thailand , over Cambodia ( Kampot province ), Laos (provinces Savannakhet , Bassac and Sainyabuli ) and Vietnam ( Dak Lak province ). It grows in dry dipterocarp forests with thin ferralithic gray to brown stony soils.
Taxonomy
The taxon was established in 1912 by Julien Noël Costantin . It is accepted as a valid taxon online by Plants of the World.
literature
- Christiane Hoffmann, Ruurd van Donkelaar, Focke Albers: Hoya. In: Focke Albers, Ulli Meve (Hrsg.): Succulents Lexicon Volume 3 Asclepiadaceae (silk plants) . Pp. 147-160, Ulmer, Stuttgart 2002, ISBN 3-8001-3982-0 (p. 156).
- Robert Dale Kloppenburg, Ann Wayman: The World of Hoyas - a pictorial guide. A revised version. 248 pp., Orca Publishing Company, Central Point, Oregon, 2007 ISBN 0-9630489-4-5 (pp. 182/83)
- Surisa Somadee, Jens Kühne: Hoya 200 different wax flowers. 96 p., Formosa-Verlag, Witten 2011 ISBN 978-3-934733-08-4 (p. 68)
- Anders Wennström, Katarina Stenman: The Genus Hoya - Species and Cultivation. 144 p., Botanova, Umeå 2008 ISBN 978-91-633-0477-4 (p. 101)
Individual evidence
- ↑ Leonid Vladimirovich Averyanov, Van The Pham, Tatiana V. Maisak, Tuan Anh Le, Van Canh Nguyen, Hoang Tuan Nguyen, Phi Tam Nguyen, Khang Sinh Nguyen, Vu Khoi Nguyen, Tien Hiep Nguyen, Michele Rodda: Preliminary checklist of Hoya ( Asclepiadaceae) in the flora of Cambodia, Laos and Vietnam. Turczaninowia, 20 (3): 103–147, 2017 doi : 10.14258 / turczaninowia.20.3.10 , here p. 131.
- ↑ Julien Noël Costantin: Asclépiadacées . In: Flore générale de l'Indo-Chine. 4. Asclépiadacées à Amaranthacées. Pp. 1–154, Paris 1912 Online at www.biodiversitylibrary.org p. 129.
- ^ Lew Sciences - Plants of the Worls online: Hoya nummularioides Costantin