Heliophila pusilla

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Heliophila pusilla
Heliophila pusilla.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Brassicales
Family: Brassicaceae
Genus: Heliophila
Species:
H. pusilla
Binomial name
Heliophila pusilla
Synonyms [1]

Ormiscus pusillus(L.f.) Eckl. & Zeyh. (1835)

Heliophila pusilla, the dainty sunspurge, is a species of plant in family Brassicaceae. It is endemic to the Cape Provinces of South Africa. [1]

Description

This slender annual grows up to 30 cm (12 in) tall. [2] The hairless stems are soft and wiry or flaccid. [3] The leaves are thread-like or lance shaped, with the widest portion near the tip. [2] They are 5–35 mm (0.20–1.38 in) long and 3–15 mm (0.12–0.59 in) wide. [3]

Flowers are present between August and October, forming dense racemes. [2] [3] They range from white to mauve in colour. [2] The petals, which range from 2 to 6 mm (0.079 to 0.236 in) in length, sometimes have basal appendages. [3] They have 3-12 ovules.

The fruits have a submoniliform shape and are 5–18 mm (0.20–0.71 in) long. [2] The bead-like structures are either continuous or joined by narrow waists. [3]

Subspecies and varieties

Four subspecies and varieties are accepted: [1]

Distribution and habitat

The dainty sunspurge is found growing between the Kouebokkeveld Mountains and De hoop in South Africa. [2] It has also been introduced in Australia. [4] It prefers clay soils. [2]

Conservation

Although the species as a whole is considered to be of least concern, Heliophila pusilla var. lanceolata is considered to be rare. [5] [6] It is found in damp, sheltered areas on south- and west-facing slopes on Karbonkelberg, Chapman's Peak, and the Noordhoek Mountains.

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References

  1. 1 2 3 Heliophila pusilla L.f. Plants of the World Online . Retrieved 7 October 2023.
  2. 1 2 3 4 5 6 7 Manning, John; Goldblatt, Peter (2012). Plants of the Greater Cape Floristic Region : 1: the core Cape flora (PDF). Pretoria: South African National Biodiversity Institute, SANBI. ISBN   978-1-919976-74-7. OCLC   852384288.
  3. 1 2 3 4 5 e-Flora of South Africa. v1.36. 2022. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.36
  4. Shaw, Elizabeth A. (1974). "Revisions of Some Genera of Cruciferae Native to Australia". Contributions from the Gray Herbarium of Harvard University (205): 147–162. ISSN   0195-6094.
  5. Foden, W.; Potter, L. (2005). "Heliophila pusilla L.f. var. pusilla. National Assessment: Red List of South African Plants version 2020.1". SANBI Red List of South African Plants. Retrieved 17 September 2011.
  6. von Staden, L. (2016). "Heliophila pusilla L.f. var. lanceolata (Adamson) Marais. National Assessment: Red List of South African Plants version 2020.1". SANBI Red List of South African Plants. Retrieved 17 September 2023.