Arnica

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 Common name is
Arnica angustifoliaNarrow leaf arnica
Arnica chamissonisLeafy Arnica
Arnica cordifoliaHeart-leaved Arnica
Arnica griscomiiSnow Arnica
Arnica lanceolataClasping Arnica
Arnica latifoliaBroad-leaf Arnica
Arnica lessingiiNodding Arnica
Arnica lonchophyllaLongleaf arnica
Arnica mollisHairy Arnica
Arnica ovataSticky Leaf Arnica

1. Inflorescence with both ray and disc flowers…………2

1. Inflorescence with disc flowers only……………….A. parryi

2.Anthers purple…………………………………….A. lessingii
2. Anthers yellow ……………………………………3
3.Some stem leaves petiolate…………………………6
3.All Stem leaves sessile………………………………4
4.Pappus white…………………………………………A. latifolia
4. Pappus straw or tawny colored………………………5
5.Phyllaries with white tufts of hair on tips……………A. chamissonis
5.Phyllaries lacking white tufts…………………………A. lanceolata
6.Heads nodding…………………………………A. griscomii
6.Heads erect……………………………………A. ovata