Huernia hislopii
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Huernia hislopii |
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| Turrill |
Huernia hislopii is a species of plant from the subfamily of the asclepiadoideae (Asclepiadoideae). The two subspecies occur in Zimbabwe and Mozambique .
description
Vegetative characteristics
Huernia hislopii forms upright, stem-succulent trunks in several, occasionally in clumps , which can be about 5 cm long / high. The stems are clearly five-ribbed in cross-section with a diameter of about 0.8 cm. No leaves are formed.
Generative characteristics
The flowering time in the home areas is between February and March. The flowers are usually solitary and directed upwards, more rarely also lying. The flower stalk reaches a length of about 2.5 cm. The hermaphrodite flowers are radially symmetrical and five-fold. The five sepals are 6 to 10 mm long and 2 mm wide. The five petals are more or less clearly fused bell-shaped with a diameter of 4 to 5 cm, in exceptional cases up to 6 cm. The crown is cream colored outside and inside, inside it is marked with red-brown dots and spots. The spherical corolla tube is provided with transverse, red-brown lines and the edge spreads abruptly outwards. The elongated triangular petal lobes measure 2.2 cm in length and 1.8 cm in width. Their ends are often drawn out tailed and bent outwards. Their surface is speckled red-brown and densely covered with cream-colored papillae about 1 mm in size and drawn out into a short spike-like tip . The secondary crown has a height of 5.5 mm. The interstaminal minor corolla lobes are approximately rectangular, dark chestnut brown to black in color. The staminal corolla lobes, on the other hand, are cream-colored with a red-brown markings, 4 to 4.5 mm high, bluntly ending and diverging, rarely diverging and standing upright. The pollinia are colored yellow.
Occurrence
Huernia hislopii is widespread in Zimbabwe and Mozambique . It grows in Mozambique on granite hills and stony soils .
Systematics
Huernia hislopii was first described by William Bertram Turrill in 1922 in the Bulletin of Miscellaneous Information (on p. 30) of the Royal Gardens, Kew . The specific epithet honors Alexander Hislop (around 1880 to 1945), gardener in Kew Gardens, who collected the type specimen near Rusape (Zimbabwe).
Three subspecies of Huernia hislopii are currently recognized:
- Huernia hislopii subsp. hislopii
- Huernia hislopii subsp. cashelensis (LCLeach & Plowes) Bruyns : It occurs only in eastern Zimbabwe.
- Huernia hislopii subsp. robusta L.C. Leach & Plowes : The shoots are more robust, five to seven ribs. The corolla tube is longer and barely spherical in shape, the base of the corolla tube has no or only a few weak concentric red-brown lines, the corolla lobes are shorter and rarely long pointed ("tailed"). Huernia hislopii subsp. robusta is restricted to Zimbabwe, where it thrives in the Mopane vegetation.
supporting documents
Individual evidence
- ^ A b M. A. Hyde & B. Wursten, 2008: Flora of Mozambique . (Last accessed on May 10, 2011)
- ↑ Bulletin of Miscellaneous Information for 1922 Scanned at Botanicus.org .
- ^ The Eponym Dictionary of Southern African Plants Plant Names GK . (Last accessed May 7, 2011)
- ↑ a b M. A. Hyde & B. Wursten, 2011: Flora of Zimbabwe : Species information: Huernia hislopii subsp. robusta . (Last accessed on May 10, 2011)
- ↑ Rafaël Govaerts (Ed.): Huernia - World Checklist of Selected Plant Families of the Royal Botanic Gardens, Kew. Last accessed on November 13, 2018.
literature
- Focke Albers and Ulli Meve (eds.): Succulent lexicon Volume 3 Asclepiadaceae (silk plants) . 322 S., Ulmer, Stuttgart 2002, ISBN 978-3-8001-3982-8 (description of Huernia hislopii on pages 165 to 166).
