Rhynchospora stiletto Naczi & Ciafré. Common name: Stiletto Beaksedge. Phenology: Jul-Aug. Habitat: Fens, calcareous wet prairies, limestone river scour outcrops. Distribution: Sc. TN to ne. AL; se. MO and adjacent ne. AR. It is only known from a small number of rare limestone-laden sites in central TN, ne. AL, se. MO, and ne. AR; further surveys are needed within its range.
ID notes: Rhynchospora stiletto appears to be closely allied to R. chalarocephala, and is distinguished primarily by its longer tubercle 2.3-2.7 mm long or 0.53-0.58× as long as the achene body (vs. 1.2-1.5 mm long or 0.39-0.48× as long as the achene body in R. chalarocephala).
Origin/Endemic status: Endemic
Taxonomy Comments: See Ciafré & Naczi (2022) for detailed discussion.
Synonymy ⓘ: = NS, POWO, Ciafré & Naczi (2022); = n/a — K4, S, S13; < Rhynchospora chalarocephala Fernald & Gale — C, FNA23
Links to other floras: < Rhynchospora chalarocephala - FNA23
Wetland Indicator Status:
- Eastern Mountains and Piedmont: OBL (taxonomic split from wetland indicator species)
- Great Plains: OBL (taxonomic split from wetland indicator species)
- Northcentral & Northeast: OBL (taxonomic split from wetland indicator species)
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Horticultural Information
No horticultural data found for this taxon.