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Regional variation in the North American elements of Oxalis corniculata (Oxalidaceae)
Vol 77, Page 1, Date 1994
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New species of Niebla (Ramalinaceae) from western North America
Vol 77, Page 23, Date 1994
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Revisionary study of Lasiarrhenum (Boraginaceae)
Vol 77, Page 38, Date 1994
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Revisionary study of the genus Allionia (Nyctaginaceae)
Vol 77, Page 45, Date 1994
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Taxonomic treatment of Monarda (Lamiaceae) for Texas and Mexico
Vol 77, Page 56, Date 1994