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R.K. Brummitt (1974). «A remarkable new species of Calystegia (Convolvulaceae) from California». Kew Bulletin. 29 (3): 499–502. ISSN0075-5974. JSTOR4107994. doi:10.2307/4107994.
R.K. Brummitt (1974). «A remarkable new species of Calystegia (Convolvulaceae) from California». Kew Bulletin. 29 (3): 499–502. ISSN0075-5974. JSTOR4107994. doi:10.2307/4107994.
R.K. Brummitt (1974). «A remarkable new species of Calystegia (Convolvulaceae) from California». Kew Bulletin. 29 (3): 499–502. ISSN0075-5974. JSTOR4107994. doi:10.2307/4107994.