Ceropegia Achtii

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Ceropegia Achtii
Systematics
Family : Dog poison family (Apocynaceae)
Subfamily : Silk plants (Asclepiadoideae)
Tribe : Ceropegieae
Sub tribus : Stapeliinae
Genre : Candlestick flowers ( Ceropegia )
Type : Ceropegia Achtii
Scientific name
Ceropegia Achtii
De Wild.

Ceropegia Achtii is a species of the subfamily of the silk plant family (Asclepiadoideae).

features

Vegetative characteristics

Ceropegia Achtii is a perennial upright plant with a bulbous rhizome. The flattened-rounded tubers reach a diameter of about 2.5 cm. The upright, rarely twisting shoots are annual and 5 to 10 centimeters high. They are unbranched and hairy. The leaves can have stems up to 2 mm long. The leaf blades are linear-lanceolate, 4 to 6 cm long and 0.5 to 1.2 cm wide. The internodes are 8 centimeters long in the lower area.

Inflorescence and flowers

The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope. The one to multi-flowered inflorescence is sessile. The flower stalk reaches 0.5 to one centimeter in length. The five narrow-lanceolate sepals that are only fused at their base are about 4 millimeters long. The five petals are fused to form a 2 to 3.5 centimeter high, curved crown with downy hair on the outside and smooth on the inside. It is greenish and more or less dense brownish-red mottled. The "kettle" is egg-shaped and measures 4 × 3.5 millimeters. The corolla tube tapers to a diameter of two millimeters; it widens only a little towards the upper end. The petal tips are narrow, lanceolate, spatulate, 4 to 12 millimeters long and fused with the tips at the upper end. The corolla lobes thus form a beehive-shaped, cage-like structure. The lamina are bent back along the midrib, and the edges themselves are bent inwards. The inside of the flower has a green to brownish basic color with purple-brown spots. On the edges there are bristly protruding hairs. The secondary crown is sessile, reddish in color and fused with a plate-like base; it measures 2 × 2 millimeters. The interstaminal (or outer) secondary crown consists of five ascending, square-pocket-shaped lobes, which are indented at the upper end to deeply cut in the middle. The staminale (or inner) secondary crown has five linear to spatulate lobes, which, standing upright, incline together at the upper end.

Fruits and seeds

The upright follicles are 8 to 10 cm long and 2.5 mm in diameter.

Similar species

Ceropegia Achtii is closely related to Ceropegia abyssinica and Ceropegia umbraticola ; these upright growing species also form tubers and hairy shoots. Herbert Huber (1957) denies a closer relationship with Ceropegia abyssinica .

Geographical distribution and ecology

The species occurs in Angola , Zambia , Zimbabwe , Togo , the Republic of the Congo and the Democratic Republic of the Congo (formerly Zaire). It grows in the hills and mountains from about 600 m to 1500 m above sea level. After Malaisse & Schaijes (1993)

Systematics and taxonomy

In 1957 Herbert Huber eliminated two other subspecies in addition to the typical subspecies (or reduced one "species" to a subspecies):

  • Ceropegia Achtii ssp. eighth ii
  • Ceropegia Achtii ssp. togoensis H. Huber
  • Ceropegia Achtii ssp. adolfi (Schltr. ex Werderm.) H. Huber

The two subspecies should differ in the indumentum and in the size of the flowers. Ulrich Meve reunited both subspecies with the typical subspecies. Another synonym according to Ulrich Meve is Ceropegia adolfi var. Gracillima Werdermann (1939).

supporting documents

literature

  • Ulrich Meve: Ceropegia . In: Focke Albers, Ulrich Meve (Hrsg.): Succulents Lexicon Volume 3 Asclepiadaceae (silk plants) . Pp. 61-107, Eugen Ulmer Verlag, Stuttgart 2002, ISBN 3-8001-3982-0
  • Herbert FJ Huber : Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana , Volume 12, 1957, pp. 1–203, Coimbra (description by C. Achtii pp. 156–158)
  • S. Lisowski, F. Malaisse: Le genre Ceropegia L. (Asclepiadaceae) au Shaba (Zaïre) . Bulletin du Jardin botanique national de Belgique / Bulletin van de National Plantentuin van België, Volume 44, No. 3/4, 1974, 401-418 online at JSTOR
  • François Malaisse: Recherches sur les Asclepiadaceae du Shaba (Zaïre). I. Nouvelles Observations sur le genre Ceropegia L. In: Bulletin du Jardin du Jardin botanique national de Belgique / Bulletin van de National Plantentuin van België , Volume 54, No. 1/2, 1984, pp. 213-234. (P. 215)

Individual evidence

  1. ^ François Malaisse, Michel Schaijes: Notes on the Ceropegias of South East Zaïre. In: Asklepios , Volume 58, 1993, pp. 21-30 (p. 26)
  2. ↑ Olivier Lachenaud: The vascular plant flora of the Republic of Congo: new records - La flore des plantes vasculaires de la République du Congo: nouvelles données. In: Systematics and Geography of Plants , Volume 79, No. 2, 2009, pp. 199-214.
  3. ↑ Erich Werdermann: Overview of the species of the genus Ceropegia originating from the Belgian Congo. In: Bulletin du Jardin botanique de l'État a Bruxelles , Volume 15, No. 2, 1938, pp. 222-240 (pp. 231/2).

annotation

  1. ↑ Alexander Lang gives the following countries on his website, in which the species should occur: Ghana, Malawi and Mozambique. However, these occurrences are not proven by literature citations.

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