Poaceae
Dichanthelium

Dichanthelium hirstii (Swallen) Kartesz

First published in Synth. N. Amer. Fl., nomencl. innov. 1(Nomencl. Innov.): 5 (1999)
This species is accepted
The native range of this species is SE. New Jersey to SW. Georgia. It is a perennial and grows primarily in the temperate biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial. Culms erect, or geniculately ascending; 55-80 cm long. Culm-internodes distally glabrous. Lateral branches sparse. Leaves all alike. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface; outer margin glabrous, or hairy. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades erect, or ascending; 4.5-11 cm long; 3-5.5 mm wide. Leaf-blade surface glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; 4.5-9 cm long; 0.5 cm wide. Primary panicle branches appressed; 1-2.5 cm long. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.8-2.1 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.8-2.1 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.5-0.8 mm long; 0.33 length of spikelet; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 7 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 7 -veined. Fertile lemma elliptic; dorsally compressed; 1.8-2.1 mm long; indurate; pallid, or yellow; without keel. Lemma margins involute. Lemma apex acute. Palea involute; indurate.
Distribution
North America: northeast USA.
Reference
Paniceae. Swallen 2004.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0