Oncosiphon grandiflorum (Thunb.) Källersjö

국표에 없다.

A robust, erect and loosely branched, slightly hairy, annual herb, growing 100–450 mm high. The bipinnatisect leaves are finely divided and up to 60 mm long. The leaf lobes are narrow.

The solitary flower-heads with yellow disc-florets are 7–10 mm in diameter. The woolly involucral bracts are in 2 rows with membranous margins.
Flowering is from September–November.

Distribution and habitat

Oncosiphon grandiflorum is found from southern Namibia, throughout Namaqualand in the Northern Cape towards Melkbosstrand in the Western Cape. In these areas it is found on sandy and stony flats, as well as lower slopes and disturbed or ploughed areas.

Derivation of name and historical aspects

The genus name, Oncosiphon, is derived from the Greek word oncos, meaning ‘thick, swollen’, and siphon, meaning ‘tube’, and refers to the swollen corolla tube characteristic for the genus.The specific epithet, grandiflorum, means ‘large-flowered’, referring to the flowers of the species.

The genus Oncosiphon is endemic to southern Africa and consists of 7 species which are mainly found in Namibia and the Western and Northern Cape.

Ecology

During the flowering-period, bees and beetles can constantly be observed visiting this aromatic plant.

The stinkkruid is an annual which means it complete its life-cycle in a single season. It is, therefore, very opportunistic and the availability of water enables seed-germination outside the normal season. This opportunism allows this species to be utilized as both a spring and summer annual.

Oncosiphon grandiflorum | PlantZAfrica (sanbi.org)

https://youtu.be/7nfcbp5gdTc