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GEOGRAPHIC RANGE AND INTRASPECIFIC VARIATION OF COULTER PINE
Volume 12, Page 1
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STUDIES IN WESTERN VIOLETS. VII
Volume 12, Page 8
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A MONOGRAPH OF THE GENERA BLOOMERIA AND MUILLA (LILIACEAE)
Volume 12, Page 19
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VARIATION IN SEEDLINGS OF CUPRESSUS ABRAMSIANA WOLF
Volume 12, Page 28
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DOCUMENTED CHROMOSOME NUMBERS OF PLANTS
Volume 12, Page 31
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NEW SPECIES AND CHANGES IN NOMENCLATURE IN THE GENUS CLARKIA (ONAGRACEAE)
Volume 12, Page 33
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RELICT ISLANDS OF XERIC FLORA WEST OF THE CASCADE MOUNTAINS IN OREGON
Volume 12, Page 39
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BALSAMORHIZA TEREBINTHACEA AND OTHER HYBRID BALSAM-ROOTS
Volume 12, Page 47
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THE RELATIONSHIP BETWEEN QUERCUS DUMOSA AND QUERCUS TURBINELLA
Volume 12, Page 49
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A CORRECTION IN THE STATUS OF VIOLA MACLOSKEYI
Volume 12, Page 60
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Pollen Morphology and Plant Taxonomy. Angiosperms (An Introduction to Palynology) by G. Erdtman
Volume 12, Page 61
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The Fern Genus Diellia: its Structure, Affinities and Taxonomy. Univ. Calif. Publ. Bot. 26 by Warren H. Wagner Jr
Volume 12, Page 62
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Downs and Dunes, Their Plant Life and Its Environment by Edward Salisbury
Volume 12, Page 64
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A NEW CLASSIFICATION OF THE TRIBE CICHORIEAE, FAMILY COMPOSITAE
Volume 12, Page 65
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TAXONOMY AND CHEMISTRY OF THE WHITE PINES
Volume 12, Page 81
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A NEW SPECIES OF CLARKIA (ONAGRACEAE)
Volume 12, Page 89
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MORPHOLOGICAL CRITERIA FOR THE SPECIFIC VALIDITY OF PINUS JEFFREYI
Volume 12, Page 92
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A Natural History of Western Trees by Donald Culross Peattie, Paul Landacre
Volume 12, Page 95
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A TAXONOMIC STUDY OF THE GENUS CHAMAECHAENACTIS RYDBERG (COMPOSITAE)
Volume 12, Page 97
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NEW AND UNUSUAL FLESHY FUNGI FROM WYOMING
Volume 12, Page 103
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ANNUAL PLANTS AT HIGH ALTITUDES IN THE SIERRA NEVADA, CALIFORNIA
Volume 12, Page 109
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NOTES ON MALVACEAE IV. THREE NEW SPECIES AND A NEW COMBINATION
Volume 12, Page 114
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TWO NEW OAK HYBRIDS FROM CALIFORNIA
Volume 12, Page 119
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NOTES AND NEWS
Volume 12, Page 128
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STUDIES ON THE CALIFORNIAN SPECIES OF STIPA (GRAMINEAE)
Volume 12, Page 129
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A NEW SPECIES OF QUERCUS IN ARIZONA
Volume 12, Page 140
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THE ALLOPOLYPLOID STIPA LATIGLUMIS
Volume 12, Page 145
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A NEW GRATIOLA FROM BOGGS LAKE, LAKE COUNTY, CALIFORNIA
Volume 12, Page 150
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A NEW SPECIES OF HELIOPSIS FROM BAJA CALIFORNIA, MEXICO
Volume 12, Page 152
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LODGEPOLE PINE DISCOVERED AND MISNAMED
Volume 12, Page 156
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Handbook of Plants of the Colorado Front Range by William A. Weber
Volume 12, Page 157
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Diccionario de Botánica by P. Font Quer
Volume 12, Page 159
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NOTES AND NEWS
Volume 12, Page 160
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MIGRATION AND EVOLUTION IN PLANTS
Volume 12, Page 161
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CHROMOSOME NUMBERS, APOMIXIS, AND INTERSPECIFIC HYBRIDIZATION IN THE GENUS TOWNSENDIA
Volume 12, Page 169
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BRYOPHYTA OF SANTA CATALINA ISLAND, CALIFORNIA
Volume 12, Page 180
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JOSEPH PRINCE TRACY 1879-1953
Volume 12, Page 190
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REALITY, EXISTENCE, AND CLASSIFICATION: A DISCUSSION OF THE SPECIES PROBLEM
Volume 12, Page 193
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DOCUMENTED CHROMOSOME NUMBERS OF PLANTS
Volume 12, Page 210
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CLARKIA EXILIS, A NEW CALIFORNIAN SPECIES
Volume 12, Page 211
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A CROSS BETWEEN AN ANNUAL SPECIES AND A PERENNIAL SPECIES OF CUCURBITA
Volume 12, Page 213
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A NEW SPECIES OF BOWLESIA FROM PAKISTAN
Volume 12, Page 217
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Flora of Bedfordshire by John G. Dony
Volume 12, Page 223
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MORPHOLOGICAL AND ECOLOGICAL CONSIDERATIONS IN THE CLASSIFICATION OF NAVARRETIA (POLEMONIACEAE)
Volume 12, Page 225
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CHROMOSOME NUMBERS IN SILENE (CARYOPHYLLACEAE): I
Volume 12, Page 238
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A DEPHLOGISTICATED SPECIES CONCEPT
Volume 12, Page 246
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APACHE PINE AND ITS RELATIONSHIP TO PONDEROSA PINE
Volume 12, Page 251