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4,849 species in Grand Canyon National Park
Symphyotrichum spathulatum
Syrbula montezuma
Tamalia coweni
Tamarix aphylla
Tanacetum vulgare
Targionia hypophylla
Tarsonops systematicus
Diadasia australis
Tenthredo maxima
Teratocephalus lirellus
Tetraclea coulteri
Thysanocarpus laciniatus
Tiaroga cobitis
Tiquilia plicata
Torreyochloa pallida
Townsendia annua
Toxomerus marginatus
Toxostoma curvirostre
Tragia nepetifolia
Tragopogon porrifolius
Tragosoma harrisii
Tramea darwini
Trapeliopsis granulosa
Diachus auratus
Trichoderma spirale
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