Hoya kerrii
Hoya kerrii, inflorescence and leaves
Hoya kerrii, colloquially sometimes called Heart Leaf Plant, heart plant or Little darling because of its leaf shape, is a species of the genus of the Wax Flower ( Hoya ) in the subfamily of the milkweed family ( Asclepiadoideae ). It comes from China prior to Java.
- 4.1 Literature
- 4.2 Notes and references
Description
Vegetative characteristics
Hoya kerrii grows as a climbing, perennial herbaceous plant. The pale and bald stem have a diameter of up to 7 mm, and achieve growth lengths of up to 1 meter. The oppositely arranged leaves are continually divided into petiole and leaf blade. The petiole has a length of 0.5 to 2 cm. The simple, thick-fleshed, bald leaf blade is upside - heart-shaped with a length of 4 to 12 cm and a width of 5 to 9.5 cm. The zweizipfelige Spreitenspitze is deep center from 1 to 1.75 cm incised or indented. The Spreitenbasis is rounded or broadly wedge -shaped.
Generative features
Of 2 to 6 cm Inflorescence stem has a diameter of about 3 mm. The Vielblütige inflorescence (up to 25 flowers ) has a diameter of 4 to 5 cm. The hermaphrodite flowers are radial symmetry and fünfzählig double perianth. The five thin sepals are hairy 1.3 to 1.8 cm long and fluffy. The five petals are oblong- oval, 2.5 mm long and dull; outside they are hairy fluffy. The corolla has a diameter of 9 mm to 11 mm, is whitish and has inside papillae and / or dense, fluffy, hair standing on. The corolla lobes are oval to rounded triangular, measuring 4 to 5 by 5 mm and are fused basally. You are strongly recurved. The corona is pink to purple, the corona lobes 2.5 mm long, relatively broad and depressed median. Basal they are fused, apically acuminate and strongly recurved. The staminal corona tip are dented to 2.5 mm wide, and on the top. The outer extension is broad and rounded, pointed, the inner extension. The pollinia measure about 1 mm in length. The flowers of Hoya kerrii produce relatively large amount of nectar that is also reddish to brownish. They do not smell or only slightly so. The anthesis lasts about 2 weeks.
Dissemination
Hoya kerrii comes in southern China, Vietnam, Laos, Cambodia, Thailand and Indonesia before (island of Java). The type locality are the Doi Sootep mountains west of Chiang Mai (Northern Thailand) at an altitude of about 390 meters.
Taxonomy
The first description was in 1911 by Hoya kerrii by William Grant Craib in the Bulletin of Miscellaneous Information Kew 1911, 10, pp. 418-419. A copy was in 1910 or 1911 at the type locality in Thailand by Arthur Francis George Kerr: " Chiengmai 390 m in narrow jungle on Doi Sootep, " collected and flourished in August 1911 in Kew Gardens. He notes that this copy of the "wild " copies on different type locality by a fluffy hair on the stems, flower stalk and leaves. He leads this difference to the different climatic conditions at the type locality and Kew Gardens ( London). Just one year later (1912 ) was provided Hoya kerrii by Julien Noël Costantin as a variety Hoya obovata. It is now generally recognized as separate species (eg Christiane Hoffmann, Ruurd van Donkelaar and Focke Albers Albers & Meve (2002) ). However Hoya kerrii is very close with Hoya obovata Decne. related, which is widely used in Southeast Asia to the Fiji Islands.
The species name honors the Hoya kerrii British physician, plant collector and author Arthur Francis George Kerr botanical works.