Hyparrhenia hirta

Common Name: thatching grass

Family: Poaceae

Common Synonyms: Andropogon hirtus

USDA Hardiness Zone: 7a-10b

Growth Habit: Perennial grass

Origin: Africa, Southern Europe, western Asia

FISC Category: -

FDACS Listed Noxious Weed: No

Introduction Date: Earliest Florida specimen vouchered in 1958

IFAS Assessment:

• North: Not Assessed
• Central: Not Assessed
• South: Not Assessed

Description

Plants perennial; cespitose but with short rhizomes. Culms 30-100 cm. Sheaths glabrous; blades 2-40 cm long, 1-3(4) mm wide. Peduncles 5-10 cm; rames 1-3.5(4) cm, 1 almost sessile, the other with a 5-10 mm base, both with 8-14 heterogamous spikelet pairs. Glumes of all spikelets densely pubescent, hairs to 0.3 mm, white to dark yellow. Sessile spikelets of homogamous pairs 4.9-5.6 mm; sessile spikelets of heterogamous pairs 4-4.5 mm; lemmas awned, awns 1-3.5 cm. Pedicellate spikelets 4.8-6.5 mm. 2n = 30, 44, 45.

Habitat

NA

Comments

NA

Control Methods

• Manual: NA
• Chemical: NA
• Biological: NA

Control Notes

NA

References

Lucid Key Server. 2016. Weeds of Australia. Hyparrhenia hirta. https://keyserver.lucidcentral.org/weeds/data/media/Html/hyparrhenia_hirta.htm Accessed March 27, 2022.

Shoot Gardening. 2022. Hyparrhenia hirta (Common thatching grass). https://www.shootgardening.co.uk/plant/hyparrhenia-hirta Accessed March 27, 2022.

Boufford, D. E. Fumaria. In: Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico [Online]. 22+ vols. New York and Oxford. Vol. 25. http://floranorthamerica.org/Hyparrhenia. Accessed [2 August 2022].