Drosera ericgreenii
| Drosera ericgreenii | ||||||||||||
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| Scientific name | ||||||||||||
| Drosera ericgreenii | ||||||||||||
| A. meat m. , RPGibson & Rivadavia |
Drosera ericgreenii is a species of plant fromthe sundew family (Droseraceae). It is native to South Africa and was first described in 2008.
description
Drosera ericgreenii is a perennial, herbaceous plant that reaches a maximum height of 10 centimeters, but usually stays shorter. Older parts of the stem axis are densely covered with the old, withered, drooping leaves.
The approximately 7 millimeter long and 2 millimeter wide stipules are triangular to oblong and round and run into five to eight uneven, 2 to 3.5 millimeter long paper segments that are initially white, but when dried, are brownish. At the base they are up to one millimeter fused with the petiole.
The leaf stalk , densely woolly, with simple, white hairs around 3 millimeters long, is 3 to 5 millimeters long and 1.5 to 3 millimeters wide at the beginning and end of the vegetation phase, and reaches a length of up to 25 millimeters at the peak and flowering period. The densely on the surface with achsabgewandten carnivorous glands occupied leaves are at the beginning of growing season breitlich reverse-ovoid, later increasingly narrow oblong-round. At the extreme end of the leaf there are marginal tentacles with a broadened attachment and an enlarged gland tip.
The upward-pointing reddish tinged to dark wine-red flower shaft is curved at the base and up to 30 centimeters long. Its lower third is provided with a dense, white hair that declines with age, the two upper thirds are covered with glands. The gland also occupied, filamentary bracts are 2 to 3 millimeters long and 0.2 to 0.3 millimeters wide.
The gland-occupied flower stalks are 5 to 10 millimeters long. The approximately bell-shaped calyx is around 5 millimeters long, the five egg-shaped sepals tapering to the tip are around 4 millimeters long and 2 millimeters wide, facing away from the axis they are covered with short glandular hairs. The five wedge-shaped, pink-colored petals rounded at the edge are around 10 millimeters long and 5 millimeters wide. The five stamens are around 2 millimeters long, the stamens widen towards the extreme end. The anthers and pollen are yellow. The three styluses are 3 to 4 millimeters long and almost branched from the base, sometimes divided into two. The scars are thickened, lobed or divided.
The approximately round ovary measures approximately 2 millimeters in diameter, the egg-shaped capsule 20 to 30 millimeters. The seeds are spindle-shaped.
ecology
During midsummer, Drosera ericgreenii survives dry seasons in the form of a small bud just above the ground. It only begins to grow again with the onset of the rainy season and also sets flowers. The flowering time - as far as known - is in November.
Distribution and location
Drosera ericgreenii is endemic in a small area near Franschhoek at altitudes between 600 and 850 meters in the western Cape region of South Africa. The plants thrive there on scree slopes with sandy soils in south to south-east exposure, preferably in partially shaded locations between rocks or in the undergrowth of shrubby plants.
Drosera ericgreenii grows in a heather-like fynbos no more than 0.5 meters high, associated with, among others, Elegia filacea , Cannomois , Anaxeton and Hypodiscus species, Erica plukenetii , Erica longiaristata , Erica mammosa , Brunia albiflora , Protea acaulis , Protea speciosa , Leucadendron salignum , Drosera cistiflora , Gazania pectinata , Diastella divaricata subsp. montana and Aristea racemosa , as well as gladioli , wood sorrel and ixia .
Systematics
Drosera ericgreenii was founded in 2008 by Andreas Fleischmann , Robert Gibson and Fernando Rivadavia using a holotype firstdescribed which was collected in October 1913 and so far as Drosera hilaris had been determined. The species epithet honors Eric Green for his contributions to the knowledge of the carnivores of the Western Cape.
Like the very similar Drosera hilaris , Drosera ericgreenii is placed in the Drosera section of the subgenus of the same name.
literature
- Andreas Fleischmann , Robert Gibson, Fernando Rivadavia: Drosera ericgreenii, a new species from the fynbos of South Africa. In: Bothalia. Vol. 38, No. 1, 2008, ISSN 0006-8241 , pp. 141-144, doi : 10.4102 / abc.v38i1.279 .