Trisetopsis rogerellisii (Mashau, Fish & A.E.van Wyk) Roser & A.Wolk
Indigenous Endemic

Morphological description

Densely tufted perennial 300-600 mm high. Leaf blade 100-200 x to 1.5 mm, setaceous. Inflorescence open; branches spreading, bare for most of their length; spikelets fewer than 20. Spikelet 13-18 mm long (excluding awns), usually loosely flowered; glumes unequal, narrowly lanceolate, acute; lower glume 1-nerved, glabrous even along the nerve; upper glume about 2/3 as long as spikelet, 3-nerved; rachilla internode 2.8-3.3 mm long, densely hairy; lemma glabrous, lobe 1.5-2.5 mm long from above the central awn insertion; anther 3.8 mm long. From: Mashau, AC. 2015. Helictotrichon Besser. In: L Fish, AC Mashau, MJ Moeaha & MT Nembudani (eds), Identification guide to the southern Africa grasses. An identification manual with keys, descriptions and distributions. Strelitzia 36: 363-371. South African National Biodiversity Institute, Pretoria. [CC BY] As: Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

Tufted perennial to 60 cm. Leaves setaceous-involute. Spikelets 13-18 mm long, in an open panicle with short, scattered hairs on branches and pedicels, upper glumes two thirds as long as spikelet, lemmas scaberulous, rachilla internodes hairy. From: Manning, JC; Goldblatt, P; Linder, HP. 2012. Poaceae: Helictotrichon Besser ex Roem. & Schult. In: J Manning & P Goldblatt (eds), Plants of the Greater Cape Floristic Region 1: The Core Cape flora. Strelitzia 29: 212-213. South African National Biodiversity Institute, Pretoria. [CC BY] As: Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

Diagnostic description

This species has setaceous leaves, an open, lax panicle with very few spikelets and long rachilla internodes. This combination of characters is not matched in any other southern African Helictotrichon species. From: Mashau, AC. 2015. Helictotrichon Besser. In: L Fish, AC Mashau, MJ Moeaha & MT Nembudani (eds), Identification guide to the southern Africa grasses. An identification manual with keys, descriptions and distributions. Strelitzia 36: 363-371. South African National Biodiversity Institute, Pretoria. [CC BY] As: Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

Habitat

In shallow humic soils between limestone outcrops. From: Mashau, AC. 2015. Helictotrichon Besser. In: L Fish, AC Mashau, MJ Moeaha & MT Nembudani (eds), Identification guide to the southern Africa grasses. An identification manual with keys, descriptions and distributions. Strelitzia 36: 363-371. South African National Biodiversity Institute, Pretoria. [CC BY] As: Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

Limestone outcrops. From: Manning, JC; Goldblatt, P; Linder, HP. 2012. Poaceae: Helictotrichon Besser ex Roem. & Schult. In: J Manning & P Goldblatt (eds), Plants of the Greater Cape Floristic Region 1: The Core Cape flora. Strelitzia 29: 212-213. South African National Biodiversity Institute, Pretoria. [CC BY] As: Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

Distribution

Collected by Ellis on two occasions at De Hoop. WC. From: Mashau, AC. 2015. Helictotrichon Besser. In: L Fish, AC Mashau, MJ Moeaha & MT Nembudani (eds), Identification guide to the southern Africa grasses. An identification manual with keys, descriptions and distributions. Strelitzia 36: 363-371. South African National Biodiversity Institute, Pretoria. [CC BY] As: Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

De Hoop. From: Manning, JC; Goldblatt, P; Linder, HP. 2012. Poaceae: Helictotrichon Besser ex Roem. & Schult. In: J Manning & P Goldblatt (eds), Plants of the Greater Cape Floristic Region 1: The Core Cape flora. Strelitzia 29: 212-213. South African National Biodiversity Institute, Pretoria. [CC BY] As: Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

Occurrence records map

This map contains point-based occurrences at different locations

iNaturalist: BODATSA: Data partners records:

Residence status

Occurrence in the Flora of Southern Africa (FSA) countries and South African provinces. Residence status indicates if a taxon is indigenous, endemic, naturalised or invasive in a specific region. This data is based on specimen records and literature

FSA

SA

BOT

NAM

ESW

LES

WC

EC

NC

FS

GA

KZN

LP

MP

NW

Absent

Indigenous

Endemic

Naturalised

Invasive

×

Names and Sources

Accepted name
Trisetopsis rogerellisii (Mashau, Fish & A.E.van Wyk) Roser & A.Wolk

Published in: Schlechtendalia 25: 60 (2013)

Synonym(s)

Helictotrichon rogerellisii Mashau, Fish & A.E.van Wyk

Published in: Bothalia 40(2): 179 (2010)


Classification

KINGDOM Plantae

SUBKINGDOM Phanerogamae

ORDER Poales

FAMILY Poaceae

SUBFAMILY Pooideae

TRIBE Aveneae

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Plant occurence records per dataset

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Occurrence records map

This map contains point-based occurrences at different locations

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2015

SERIES CHAPTER

Helictotrichon Besser Mashau, AC

In: L Fish, AC Mashau, MJ Moeaha & MT Nembudani (eds), Identification guide to the southern Africa grasses. An identification manual with keys, descriptions and distributions. Strelitzia 36: 363-371

South African National Biodiversity Institute, Pretoria

2013

PERIODICAL/JOURNAL

The new genus Trisetopsis and new combinations in oat-like grasses (Poaceae) Wolk, A; Roser, M

Schlechtendalia 25: 57-61

2012

SERIES CHAPTER

Poaceae: Helictotrichon Besser ex Roem. & Schult. Manning, JC; Goldblatt, P; Linder, HP

In: J Manning & P Goldblatt (eds), Plants of the Greater Cape Floristic Region 1: The Core Cape flora. Strelitzia 29: 212-213

South African National Biodiversity Institute, Pretoria

2010

PERIODICAL/JOURNAL

Two new species of Helictotrichon (Pooideae: Aveneae) from South Africa. Fish, L; Mashau, AC; Van Wyk, AE

Bothalia 40(2)179-183

No results found for Trisetopsis rogerellisii (Mashau, Fish & A.E.van Wyk) Roser & A.Wolk

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