Sutera (genus)
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Sutera is a genus within the family of Figworts in the order of Lippenblütlerartigen (Lamiales).
description
The species of the genus Sutera grow independently upright to creeping or drooping as annuals to perennial herbaceous plants , or as a half-shrubs to small shrubs . Some species have an aromatic smell. The plant parts can be hairy, glandular or smooth. The opposite or almost opposite arranged leaves are petiolate to sessile with serrated, wavy to lobed, rarely smooth leaf margin.
The flowers are individually in the leaf axils or in terminal, racemose , spiked or zymous inflorescences on inflorescence shafts. The bracts are similar to the leaves but smaller. The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The five sepals are fused and is two-lipped. The five petals are fused Roehrig, whereby the corolla tube can be longer or shorter than the calyx. The five corolla lobes are rarely short in two parts. There are only four stamens present, which sometimes protrude above the corolla tube. The thread-like stamens arise in the corolla tube. The ovary is twofold. The thin stylus does not protrude beyond the corolla tube. The scar is very short and slightly bifurcated.
The septicidal capsule fruit is bilobed and contains many seeds. The small, gray-blue or ocher-colored seeds have a structured surface.
distribution
The genus Sutera comprises about 49 species that are originally native to South Africa and Namibia .
Systematics
The genus Sutera was first published in 1807 by Albrecht Wilhelm Roth in Botanical Comments and Corrections , p. 172.
The genus used to contain around 130 species. However, it was not monophyletic , but its two subgenera Sutera and Chaenostoma turned out to be monophyletic, so the subgenus became genera with the reactivation of the genus Chaenostoma Benth. , some species are now in the genus Jamesbrittenia Kuntze .
The following types belong here (selection):
- Sutera polyantha (Benth.) Kuntze : It occurs in the Western and Eastern Cape.
- Sutera silenioides Hilliard : It was first described from KwaZulu-Natal.
For example, the following is no longer included in this category:
- Sutera canariensis (Webb) Sunding & G.Kunkel => Camptoloma canariense (Webb & Berthel.) Hilliard
- Sutera grandiflora (Galpin) Here => Jamesbrittenia grandiflora (Galpin) Hilliard
- Sutera merxmuelleri Roessler => Jamesbrittenia merxmuelleri (Roessler) Hilliard
- The ornamental plant Bacopa ( Chaenostoma cordatum Benth. , Syn .: Sutera cordata (Benth.) Kuntze , Sutera diffusa ) used to belong to this genus. The white varieties of this species are called "snowflakes" in the plant trade.
literature
- D. Philcox: Scrophulariaceae in the Flora Zambesiaca , Volume 8, 1990: The genus in the old extent before the division into two genera.
Individual evidence
- ↑ Per Kornhall & Birgitta Bremer: New circumscription of the tribe Limoselleae (Scrophulariaceae) that includes the taxa of the tribe Manuleeae , in Botanical Journal of the Linnean Society , Volume 146, Issue 4, 2004, pp. 453-467.
- ^ Sutera in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
