Schoenus bolusii

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Schoenus bolusii
Sbolusii-plant2.jpg
Spotted veldrush
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Cyperaceae
Genus: Schoenus
Species:
S. bolusii
Binomial name
Schoenus bolusii
(C.B.Clarke) T.L.Elliott & Muasya
Sbolusii-map.jpg
Documented collection localities
Synonyms [1]
  • Tetraria bolusiiC.B.Clarke

Schoenus bolusii is a species of sedge endemic to the mountains of the Western Cape Province of South Africa. [1] However, S. bolusii is not found on the Cape Peninsula. [1]

Contents

Description

The key diagnostic character of S. bolusii are its relatively narrow (<1.2 mm) and short (<4.0 mm) spikelets. [1] In addition, S. bolusii has small reddish-purple streaks adjacent to its glume margins and similar streaking patterns on its membranaceous leaf sheaths. [1]

Schoenus exilis , Schoenus ligulatus and Schoenus quartziticus resemble S. bolusii, but these three species do not have the reddish-purple streaking patterns that are characteristic of the glumes and leaf sheaths of S. bolusii. [1]

Schoenus submarginalis is most similar to S. bolusii, but the two species differ in their leaf sheaths, with those of S. submarginalis being firm, whereas the sheaths of S. bolusii are membranaceous with reddish-purple-streaking patterns. [1]

Similar to other sedges, plants in this group are very difficult to identify. It appears that part of this problem is caused by the tendency of the southern African Schoenus to form hybrids with each other. [2] It is not clear whether Schoenus bolusii forms hybrids with other southern African Schoenus species. [1]

Taxonomy

Schoenus bolusii is a species in family Cyperaceae, tribe Schoeneae. [1] Other notable genera in tribe Schoeneae include Lepidosperma , Oreobolus , Costularia, Tetraria and Gahnia . [1] [3] [4] The most closely related species to S. bolusii are other southern African Schoenus species, specifically, species in the S. cuspidatus and allies group. [1]

Southern African Schoenus were once classified as Tetraria; however, based on molecular and morphological differences, we now know that the two groups are evolutionary distinct. [5] To ensure that this group of sedges is monophyletic (i.e. the genus only has closely related species), several species of Epischoenus and the southern African Tetraria were transferred into Schoenus. [5] In the field, the southern African Schoenus can be distinguished from Tetraria species by their lack of stem leaves and the absence of reticulate sheaths at the bases of the flowering stems. [5]

Distribution and habitat

Schoenus bolusii is a species of sedge found in the mountains of the Western Cape Province of South Africa. However, this species is not found on the Cape Peninsula. [1] This species generally occurs on dry sites on coarse soils, but it has been also collected from wet mountain slopes. [1] The reported elevation range of S. bolusii is between sea level and nearly 1000 m. [1]

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Related Research Articles

<i>Schoenus quartziticus</i> Species of grass-like plant

Schoenus quartziticus is a species of sedge endemic to the Agulhas Plain region of the Western Cape Province in southern South Africa.

<i>Schoenus megacarpus</i> Species of grass-like plant

Schoenus megacarpus is a species of sedge endemic to the south-central region of South Africa.

<i>Schoenus filiculmis</i> Species of grass-like plant

Schoenus filiculmis is a species of sedge endemic to the western mountains of the Western Cape and Northern Cape Provinces of South Africa.

<i>Schoenus auritus</i> Species of grass-like plant

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<i>Schoenus graminifolius</i> Species of grass-like plant

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<i>Schoenus prophyllus</i> Species of grass-like plant

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<i>Schoenus ligulatus</i> Species of grass-like plant

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<i>Schoenus exilis</i> Species of grass-like plant

Schoenus exilis is a species of sedge endemic to the western areas of the Western Cape Province of South Africa.

<i>Schoenus submarginalis</i> Species of grass-like plant

Schoenus submarginalis is a species of sedge endemic to the mountains of the Western and Eastern Cape provinces of South Africa.

<i>Schoenus crassiculmis</i> Species of grass-like plant

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<i>Schoenus limosus</i> Species of grass-like plant

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<i>Schoenus purpurascens</i> Species of grass-like plant

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<i>Schoenus albovaginatus</i> Species of grass-like plant

Schoenus albovaginatus is a species of sedge endemic to the mountains of south-western South Africa.

<i>Schoenus bracteosus</i> Species of grass-like plant

Schoenus bracteosus is a species of sedge endemic to the mountains of southern South Africa.

<i>Schoenus riparius</i> Species of grass-like plant

Schoenus riparius is a species of sedge endemic to the Cape Peninsula of South Africa.

<i>Schoenus adnatus</i> Species of grass-like plant

Schoenus adnatus is a species of sedge endemic to mountainous locations in southern regions of South Africa.

<i>Schoenus gracillimus</i> Species of grass-like plant

Schoenus gracillimus is a species of sedge endemic to the Western Cape Province of South Africa.

<i>Schoenus brunnescens</i> Species of grass-like plant

Schoenus brunnescens is a species of sedge endemic to the Western Cape Province of South Africa.

<i>Schoenus graciliculmis</i> Species of grass-like plant

Schoenus graciliculmis is a species of sedge endemic to regions of the southern Eastern Cape Province and nearby regions of the Western Cape Province of South Africa.

<i>Schoenus inconspicuus</i> Species of grass-like plant

Schoenus inconspicuus is a species of sedge endemic to south-western areas of the Western Cape Province of South Africa.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Elliott, T.L.; Barrett, R.L.; Muasya, A.M. (2019). "A taxonomic revision of Schoenus cuspidatus and allies (Cyperaceae, tribe Schoeneae)—Part 1". South African Journal of Botany. 121: 519–535. doi: 10.1016/j.sajb.2018.11.021 .
  2. ↑ Levyns, M. (1947). "Tetraria and related genera, with special reference to the flora of the Cape Peninsula". Journal of South African Botany. 13: 73–93.
  3. ↑ Viljoen, J.-A.; Muasya, A.M.; Barrett, R.L.; Bruhl, J.J.; Gibbs, A.K.; Slingsby, J.A.; Wilson, K. L.; Verboom, G.A. (2013). "Radiation and repeated transoceanic dispersal of Schoeneae (Cyperaceae) through the southern hemisphere". American Journal of Botany. 100 (12): 2494–2508. doi:10.3732/ajb.1300105.
  4. ↑ Larridon, I.; Bauters, K.; Semmouri, I.; Viljoen, J.-A.; Prychid, C.J.; Muasya, A.M.; Bruhl, J.J.; Wilson, K.L.; Senterre, B.; Goetghebeur, P. (2018). "Molecular phylogenetics of the genus Costularia (Schoeneae, Cyperaceae) reveals multiple distinct evolutionary lineages". Molecular Phylogenetics and Evolution. 126: 196–209. doi:10.1016/j.ympev.2018.04.016.
  5. 1 2 3 Elliott, T.L.; Muasya, A.M. (2017). "Taxonomic realignment in the southern African Tetraria (Cyperaceae, tribe Schoeneae; Schoenus clade)". South African Journal of Botany. 112: 354–360. doi: 10.1016/j.sajb.2017.06.011 .
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