Unidentified Cottongrasses: Can you help identify these cottongrasses?
Tall Cottongrass: Eriophorum angustifolium ssp. angustifolium (Synonyms: Eriophorum angustifolium ssp. scabriusculum, Eriophorum angustifolium ssp. subarcticum, Eriophorum angustifolium var. coloratum, Eriophorum angustifolium var. giganteum, Eriophorum angustifolium var. majus, Eriophorum polystachion)
Tall Cottongrass: Eriophorum angustifolium ssp. triste (Synonym: Eriophorum triste) ?
Closed-sheath Cottongrass, Northland Cottonsedge: Eriophorum brachyantherum (Synonyms: Eriophorum opacum, Eriophorum vaginatum var. opacum)
Arctic Cottongrass: Eriophorum callitrix
Slender Cottongrass: Eriophorum gracile
Red Cottongrass: Eriophorum russeolum ssp. leiocarpum
White Cottongrass: Eriophorum scheuchzeri ssp. arcticum
Tussock Cotton-grass: Eriophorum vaginatum (Synonyms: Eriophorum spissum, Eriophorum spissum var. erubescens, Eriophorum vaginatum ssp. spissum)