30:49-56 Johnson, B.L. 1945. Natural hybrids between Oryzopsis hymenoides and several species of Stipa. Amer. J. Bot. 32:599-608 Johnson, B.L. 1960. Natural
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Systematics of the tribe Stipeae using molecular data. Aliso 23:349-361 Johnson, B.L. 1945. Cytotaxonomic studies in Oryzopsis. Bot. Gaz. 107:1-32 Prokudin,
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Systematics of the tribe Stipeae using molecular data. Aliso 23:349-361 Johnson, B.L. 1945. Cytotaxonomic studies in Oryzopsis. Bot. Gaz. 107:1-32 Kam, Y.K.
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Systematics of the tribe Stipeae using molecular data. Aliso 23:349-361 Johnson, B.L. 1945. Cytotaxonomic studies in Oryzopsis. Bot. Gaz. 107:1-32. Piptatherum
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