Contains 5 accepted taxa overall.
Characteristics
Classification
Citation
CHASMANTHIUM Link, Hort. Berol. 1: 159. 1827.
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TYPE: Chasmanthium gracile (Michaux) Link (Uniola gracilis Link)
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Chasmanthium latifolium | INDIAN WOODOATS | Native FAC (NWPL) FAC (DEP) | ||
| Chasmanthium laxum | SLENDER WOODOATS | Native FACW (NWPL) FACW (DEP) | ||
| Chasmanthium nitidum | SHINY WOODOATS | Native FACW (NWPL) FACW (DEP) | ||
| Chasmanthium ornithorhynchum | BIRDBILL WOODOATS | Native FACW (NWPL) FACW (DEP) | ||
| Chasmanthium sessiliflorum | LONGLEAF WOODOATS | Native FAC (NWPL) FAC (DEP) |
Identification Key
1. Inflorescence branches lax, drooping; pedicels 10-30 mm long; lower glumes 4.2-9.1 mm long; callus pilose; fertile lemma keel wing scabrous to pilose throughout; caryopses 2.9-5 mm long
1. Inflorescence branches spreading, ascending to erect, generally stiff; pedicels 0.5-5 mm long; lower glumes 1.2-5 mm long; callus glabrous; fertile lemma keel not winged, scabridulous only near the apex; caryopses 1.9-3 mm long
2
2. Culms leafy in proximal half; leaf blades (8)20-50 cm long; inflorescence branches mostly appressed; spikelets 4-10 mm long; fertile lemma with 3-9 veins; lemman and palea spreading open, exposing the caryopses
3
2. Culms leafy nearly throughout; leaf blades 7-16(33) cm long; inflorescence branches mostly ascending to spreading; spikelets 9.5-24 mm long; fertile lemma with 9-13 veins; lemma and palea closely imbricate, concealing the caryopses
4
3. Culm nodes to 1 mm wide; leaf sheath and collar glabrous; fertile lemma straight, with 3-7 veins
3. Culm nodes (1)2-3.5 mm wide; leaf sheath and collar pilose; fertile lemma usually curved or irregularly contorted, with 7-9 veins
4. Culm nodes often dark purple to blackish; ligules entire; inflorescence branch axils scabrous; fertile floret ascending from the rachilla; sterile florets (0)1(2); lower glumes 3.1-5 mm long
4. Culm nodes mostly light brown; ligules irregularly laciniate; inflorescence branch axils pilose; fertile floret diverging-spreading from the rachilla; sterile florets 2-4; lower glumes 2.5-2.9 mm long, with 2-3 veins
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| Gouldochloa | Gouldochloa Valdés-Reyna et al., Syst. Bot. 11: 112. 1986. | TYPE: Gouldochloa curvifolia Valdés-Reyna et al. |