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Isocoma humilis

Isocoma tenuisecta

Isoetes microvela

Isoetes saccharata

Isolepis pseudosetacea

Iva texensis

Isopterygiopsis pulchella

Isopterygium drummondii

Limonium gerberi

Isopogon cuneatus

Isolepis carinata

Isoetes orcuttii

Isoetes tennesseensis

Isolepis cernua

Fiber-optic-grass

Isolepis setacea

Bristleleaf bulrush

Isoetes prototypus

Plagiothecium micans var. fulvum

Isothecium alopecuroides

Isothecium cristatum var. howei

Pterogonium peregrinum