TRENDS IN SYSTEMATIC BOTANY
105
Ownbey, Μ. 1950. Natural hybridization and amphiploidy in the genus Tragopogón. Am. ]. Botany 37: 487-499.
Ownbey, M., and Weber, W. A. 1943. Natural hybridization in the genus Balsamorhiza. Am. J. Botany 30: 179-187.
Ownbey, R. P. 1944. The Liliaceous genus Polygonatum in North America. Ann.
Missouri Botan. Garden 31: 373-413.
Petersen, A. E. 1953. A comparison of the secondary xylem elements of certain
species of the Amentiferae and Ranales. Bull. Torrey Botan. Club 80: 365-384.
Prat, H. 1936. La systématique des Graminées. Ann. Sei. not. Botan. [10], 18:
165-258.
Pugsley, Η. W. 1948. A prodromus of the British Hieracia. J. Linnean Soc.
London, Botany 54: 1-356.
Puri, V. 1951. The role of floral anatomy in the solution of morphological problems. Botan. Rev. 17: 471-553.
Ray, P. M. 1934. Cytological, genetic and morphological study of evolution in
the borage genus Amsinckia. 8th Congr. intern. Botany Rapp. Communs. Sect.
10: 188-190.
Reeder, J. R. 1953. Affinities of the grass genus Beckmannia Host. Bull. Torrey
Botan. Club 80: 187-196.
Reinders-Gouwentak, C. A. 1955. The storied-structure-features and the taxonomic
rank of the Leguminous taxa. Acta Botan. Need. 4: 460-470.
Rickett, H. W., and Camp, W. H. 1948. The nomenclature of hybrids. Bull.
Torrey Botan. Club 75: 496-501.
Rollins, R. C. 1944. Evidence for natural hybridity between guayule (Parthenium argentatum) and mariola (Parthenium incanum). Am. J. Botany 31: 93-99.
Rollins, R. C. 1945. Interspecific hybridization in Parthenium I. Crosses between
guayule (P. argentatum) and mariola (P. incanum). Am. J. Botany 32: 395404.
Rollins, R. C. 1949. Sources of genetic variation in Parthenium argentatum Gray
(Compositae). Evolution 3: 358-368.
Rollins, R. C. 1954. Interspecific hybridization and its role in plant evolution.
8th Congr. intern. Botany Rapp. Communs. Sect. 10: 172-180.
Sax, K. 1933. Species hybrids in Platanus and Campsis. J. Arnold Arboretum
(Harvard Univ.) 14: 274-278.
Sax, K., and Sax, H. J. 1937. Stomata size and distribution in diploid and polyploid plants. /. Arnold Arboretum (Harvard Univ.) 18: 164-172.
Sears, E. R. 1948. The cytology and genetics of the wheats and their relatives.
Advances in Genet. 2: 239-270.
Shimotomai, N. 1933. Zur Karyogenetik der Gattung Chrysanthemum. J. Set.
Hiroshima Univ. Ser. Β, Div. 2, 2: 1-100.
Simonet, M. 1932. Recherches cytologiques et génétiques chez les Iris. Bull.
biol. France et Belg. Ser. A 66: 255-450.
Skovsted, A. 1934. Cytological studies in cotton. II. Two interspecific hybrids
between Asiatic and New World cottons. /. Genet. 28: 407-424.
Skovsted, A. 1937. Cytological studies in cotton. IV. Chromosome conjugation in
interspecific hybrids. /. Genet. 34 : 95-134.
Skovsted, A. 1941. Chromosome numbers in the Malvaceae. II. Compt. rend.
trav. lab. Carlsberg, Ser. physiol. 23: 195-242.
Smith, F. H., and Smith, E. C. 1943. Floral anatomy of the Santalaceae and
some related forms. Oregon State Monographs, Studies in Botany No. 5: 1-93.
105
Ownbey, Μ. 1950. Natural hybridization and amphiploidy in the genus Tragopogón. Am. ]. Botany 37: 487-499.
Ownbey, M., and Weber, W. A. 1943. Natural hybridization in the genus Balsamorhiza. Am. J. Botany 30: 179-187.
Ownbey, R. P. 1944. The Liliaceous genus Polygonatum in North America. Ann.
Missouri Botan. Garden 31: 373-413.
Petersen, A. E. 1953. A comparison of the secondary xylem elements of certain
species of the Amentiferae and Ranales. Bull. Torrey Botan. Club 80: 365-384.
Prat, H. 1936. La systématique des Graminées. Ann. Sei. not. Botan. [10], 18:
165-258.
Pugsley, Η. W. 1948. A prodromus of the British Hieracia. J. Linnean Soc.
London, Botany 54: 1-356.
Puri, V. 1951. The role of floral anatomy in the solution of morphological problems. Botan. Rev. 17: 471-553.
Ray, P. M. 1934. Cytological, genetic and morphological study of evolution in
the borage genus Amsinckia. 8th Congr. intern. Botany Rapp. Communs. Sect.
10: 188-190.
Reeder, J. R. 1953. Affinities of the grass genus Beckmannia Host. Bull. Torrey
Botan. Club 80: 187-196.
Reinders-Gouwentak, C. A. 1955. The storied-structure-features and the taxonomic
rank of the Leguminous taxa. Acta Botan. Need. 4: 460-470.
Rickett, H. W., and Camp, W. H. 1948. The nomenclature of hybrids. Bull.
Torrey Botan. Club 75: 496-501.
Rollins, R. C. 1944. Evidence for natural hybridity between guayule (Parthenium argentatum) and mariola (Parthenium incanum). Am. J. Botany 31: 93-99.
Rollins, R. C. 1945. Interspecific hybridization in Parthenium I. Crosses between
guayule (P. argentatum) and mariola (P. incanum). Am. J. Botany 32: 395404.
Rollins, R. C. 1949. Sources of genetic variation in Parthenium argentatum Gray
(Compositae). Evolution 3: 358-368.
Rollins, R. C. 1954. Interspecific hybridization and its role in plant evolution.
8th Congr. intern. Botany Rapp. Communs. Sect. 10: 172-180.
Sax, K. 1933. Species hybrids in Platanus and Campsis. J. Arnold Arboretum
(Harvard Univ.) 14: 274-278.
Sax, K., and Sax, H. J. 1937. Stomata size and distribution in diploid and polyploid plants. /. Arnold Arboretum (Harvard Univ.) 18: 164-172.
Sears, E. R. 1948. The cytology and genetics of the wheats and their relatives.
Advances in Genet. 2: 239-270.
Shimotomai, N. 1933. Zur Karyogenetik der Gattung Chrysanthemum. J. Set.
Hiroshima Univ. Ser. Β, Div. 2, 2: 1-100.
Simonet, M. 1932. Recherches cytologiques et génétiques chez les Iris. Bull.
biol. France et Belg. Ser. A 66: 255-450.
Skovsted, A. 1934. Cytological studies in cotton. II. Two interspecific hybrids
between Asiatic and New World cottons. /. Genet. 28: 407-424.
Skovsted, A. 1937. Cytological studies in cotton. IV. Chromosome conjugation in
interspecific hybrids. /. Genet. 34 : 95-134.
Skovsted, A. 1941. Chromosome numbers in the Malvaceae. II. Compt. rend.
trav. lab. Carlsberg, Ser. physiol. 23: 195-242.
Smith, F. H., and Smith, E. C. 1943. Floral anatomy of the Santalaceae and
some related forms. Oregon State Monographs, Studies in Botany No. 5: 1-93.