Cyperus thyrsiflorus Junghuhn. Common name: Southern Flatsedge. Phenology: May-Sep. Habitat: Calcareous woodlands/hammocks, swamp edges, and shell middens. Distribution: E. SC south to s. FL, west to se. TX; West Indies; Mexico to South America.
ID notes: C. pseudothyrsiflorus is sometimes confused with this species. C. pseudothyrsiflorus is a more robust plant, with mucronate scales, maturing reddish-brown (vs. pale olivaceous); see Key ZD. C. tenuis, a Central American species, has been reported from southern Texas, probably based on material of this species; it has much denser ovoid (vs. oblong-cylindric, parallel-sided) spikes, slightly flattened spikelets, and greenish scales overlapping at least 1/4-1/3 of the next distal scale.
Origin/Endemic status: Native
Synonymy ⓘ: = ETx1, FNA23, K4, Mex, NS, POWO, WH3, Carter & Jones (1997); = Cyperus hermaphroditus (Jacq.) Standl. — S, misapplied; = n/a — RAB. Basionym: Cyperus thyrsiflorus Jungh. 1831
Links to other floras: = Cyperus thyrsiflorus - FNA23
Show parent genus | Show parent in key(s)
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FAC
- Great Plains: FAC
Heliophily ⓘ: 6
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© Jake Smith, some rights reserved (CC BY-NC), uploaded by Jake Smith source CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Jake Smith, some rights reserved (CC BY-NC), uploaded by Jake Smith source CC-BY-NC, permission granted to NCBG | Original Image ⭷
© Jake Smith, some rights reserved (CC BY-NC), uploaded by Jake Smith source CC-BY-NC, permission granted to NCBG | Original Image ⭷Feedback
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