Knieskern's Beaksedge ⚠️ Threatened

Rhynchospora knieskernii

Native to:
United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Cyperaceae
Genus:
Rhynchospora
Species:
Rhynchospora knieskernii
USDA Symbol:
RHKN

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Graminoid
Height:
100 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
jul,aug,sep
Bloom Colors:
white

Garden & Ecology Notes

Wildlife Value:
birds
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Occurs in fire-maintained pine barrens; benefits from periodic fire to reduce competition and maintain open, wet sandy/peaty habitat.

Soil Requirements

Soil Type:
sandy, acidic, nutrient-poor soil
pH:
4.5 - 6.0 (acidic to slightly acidic)
Drainage:
excellent drainage required
Moisture:
consistently moist
Notes:
Typically found in open, sandy wetlands

Propagation & Germination

Stratification:
Cold/moist stratification required — 60–90 days
Germination Time:
30–60 days
Notes:
Seeds benefit from cold, moist stratification for 60-90 days; germination occurs in spring under warm, moist conditions.