Sporobolus, Brown, 1810
publication ID |
https://doi.org/ 10.11646/phytotaxa.144.1.2 |
DOI |
https://doi.org/10.5281/zenodo.5100209 |
persistent identifier |
https://treatment.plazi.org/id/03AF8798-5D07-FFE8-638F-FE73FA05FB94 |
treatment provided by |
Felipe |
scientific name |
Sporobolus |
status |
|
Key to the species of Sporobolus View in CoL from Ascension and Trindade Islands
1. Both glumes shorter than the anthecium. Continental Africa and weedy on Ascension............................. S. africanus View in CoL
- Lower glume shorter than the anthecium, the upper subequal to longer than the anthecium ...................................... 2
2. Plants 70–90 cm tall, with short rhizomes, forming dense tussocks. Panicle open to lax, 5.5–17 cm long. Leaf blades 30–60 cm × 1.2–1.5 mm, the sheaths 3–5 mm wide, conspicuously wider than the leaf-blades. Spikelets 3–3.5 mm long. Trindade Island ............................................................................................................................... S. nesiotioides View in CoL
- Plants 6–45(–65) cm tall, with short or long rhizomes. Panicle contracted, 1–11 cm long. Leaf blades (1.3–)2.3–20(– 28) cm × (1.5–)2–3(–5) mm, continuous with the leaf sheaths. Spikelets 2–3(–3.5) mm long ................................... 3
3. Plants up to 65 cm tall, with long and slender rhizomes, not forming tussocks. Pantropical, mostly on sandy coastal strands (up to 600 m elevation on volcanic tuff on Trindade Island) ......................................................... S. virginicus View in CoL
- Plants 6–45 cm tall, with short rhizomes, forming lax tussocks. Ascension Island.................................................... 4.
4. Plants 6–10 cm tall. Panicle 1–2 cm long, largely hidden in the leaves. Spikelets ca. 2 mm long. Ascension Island, endemic, endangered ................................................................................................................................. S. caespitosus View in CoL
- Plants 30–45 cm tall. Panicle 5–9 cm long, exserted. Spikelets 3–3.5 mm long. Ascension Island, endemic, considered extinct ......................................................................................................................................................... S. durus View in CoL
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