Convolvulus occidentalis var. tenuissimus A.Gray variety synonym Calystegia macrostegia subsp. macrostegia subspecies accepted Volvulus occidentalis Farw. species proparte synonym Convolvulus occidentalis S.Watson species heterotypic synonym Volvulus occidentalis var. angustissimus Farw. variety synonym Volvulus macrostegius (Greene) Farw. species synonym Convolvulus aridus Greene species synonym Convolvulus cyclostegius House species synonym Convolvulus macrostegius Greene species synonym Convolvulus aridus subsp. tenuifolius Abrams subspecies synonym Convolvulus aridus subsp. longilobus Abrams subspecies synonym Convolvulus aridus subsp. intermedius Abrams subspecies synonym Convolvulus greenei House species synonym Calystegia macrostegia subsp. tenuifolia (Abrams) Brummitt subspecies accepted Calystegia macrostegia subsp. longiloba (Abrams) Brummitt subspecies synonym Calystegia macrostegia subsp. intermedia (Abrams) Brummitt subspecies accepted Calystegia macrostegia subsp. cyclostegia (House) Brummitt subspecies accepted Calystegia macrostegia subsp. arida (Greene) Brummitt subspecies accepted Calystegia macrostegia subsp. amplissima Brummitt subspecies accepted Convolvulus cyclostegius var. intermedius (Abrams) Hoover variety synonym Convolvulus occidentalis var. macrostegius (Greene) Munz variety synonym Convolvulus occidentalis var. cyclostegius (House) Jeps. variety synonym Convolvulus occidentalis var. angustissimus A.Gray variety synonym Convolvulus nuttallii Greene species heterotypic synonym Convolvulus aridus subsp. aridus subspecies synonym |