- Dasystephana affinis (Griseb.) Rydb., 1906
- Pneumonanthe affinis (Griseb.) Greene, 1904
- Dasystephana bigelovii (A.Gray) Rydb., 1906
- Dasystephana forwoodii (A.Gray) Rydb., 1906
- Dasystephana interrupta (Greene) Rydb., 1906
- Dasystephana oregana (Engelm. ex A.Gray) Rydb., 1913
- Dasystephana oxyloba Greene, 1911
- Dasystephana rusbyi (Greene ex Kusn.) Wooton & Standl., 1913
- Gentiana affinis var. bigelovii (A.Gray) Kusnezow, 1894
- Gentiana affinis var. brachycalyx A.Gray, 1863
- Gentiana affinis var. forwoodii (A.Gray) Kusnezow, 1898
- Gentiana affinis var. major A.Nelson & J.F.Macbr., 1913
- Gentiana affinis var. ovata A.Gray, 1876
- Gentiana affinis var. parvidentata Kusnezow, 1898
- Gentiana affinis subsp. rusbyi (Greene ex Kusn.) Halda, 1885
- Gentiana bigelovii A.Gray, 1883
- Gentiana forwoodii A.Gray, 1883
- Gentiana interrupta Greene, 1900
- Gentiana oregana Engelm. ex A.Gray, 1878
- Gentiana rusbyi Greene ex Kusnezow, 1894
- Pneumonanthe bigelovii (A.Gray) Greene, 1904
- Pneumonanthe forwoodii (A.Gray) Greene, 1904
- Pneumonanthe interrupta (Greene) Greene, 1904
- Pneumonanthe oregana (Engelm. ex A.Gray) Greene, 1904
- Pneumonanthe rusbyi (Greene ex Kusn.) Greene, 1904
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