caa a22 4500 475806506 CHVBK 20180406123748.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/BF00985329 doi (NATIONALLICENCE)springer-10.1007/BF00985329 Floral ontogeny and anatomy in Koelreuteria with special emphasis on monosymmetry and septal cavities [Elektronische Daten] [L. Decraene, E. Smets, D. Clinckemaillie] The floral ontogeny and anatomy ofKoelreuteria paniculata have been investigated to understand the developmental basis for the occurring monosymmetry and the origin of the septal cavities. Petals arise sequentially and one petal is missing between sepals 3 and 5, or rarely between sepals 2 and 5. The eight stamens arise sequentially before petal initiation is completed. The last formed petal and one stamen arise on a common primordium. Two stamen positions are empty (opposite the petal between the sepals 2 and 5, and the petal between sepal 1 and 3); consequently two antesepalous stamens have become displaced. The derivation of octandry from a diplostemonous ancestry, and reduction of the petal are discussed. The triangular gynoecium has a strong impact in obliquely reorganizing the symmetry of the flower, loss of organs, and shifts of stamens. The so-called septal slits occurring within the style are a deepreaching non-nectariferous extension of the stigma. Alternating locular furrows are present which could play a role as pollen transmitting tissue and in the loculicid dehiscence of the capsule. Springer-Verlag, 2000 Sapindales nationallicence Koelreuteria paniculata nationallicence Androecium nationallicence diplostemony nationallicence floral development nationallicence monosymmetry nationallicence nectaries nationallicence oblique symmetry nationallicence septal cavity nationallicence Decraene L. Laboratory of Systematics, Institute for Botany and Microbiology, Katholieke Universiteit Leuven, Kardinaal Mercierlaan 92, B-3001, Leuven, Belgium aut Smets E. Laboratory of Systematics, Institute for Botany and Microbiology, Katholieke Universiteit Leuven, Kardinaal Mercierlaan 92, B-3001, Leuven, Belgium aut Clinckemaillie D. Laboratory of Systematics, Institute for Botany and Microbiology, Katholieke Universiteit Leuven, Kardinaal Mercierlaan 92, B-3001, Leuven, Belgium aut Plant Systematics and Evolution Springer-Verlag 223/1-2(2000-03-01), 91-107 0378-2697 223:1-2<91 2000 223 606 https://doi.org/10.1007/BF00985329 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00985329 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Decraene L. Laboratory of Systematics, Institute for Botany and Microbiology, Katholieke Universiteit Leuven, Kardinaal Mercierlaan 92, B-3001, Leuven, Belgium aut NATIONALLICENCE 700 1- Smets E. Laboratory of Systematics, Institute for Botany and Microbiology, Katholieke Universiteit Leuven, Kardinaal Mercierlaan 92, B-3001, Leuven, Belgium aut NATIONALLICENCE 700 1- Clinckemaillie D. Laboratory of Systematics, Institute for Botany and Microbiology, Katholieke Universiteit Leuven, Kardinaal Mercierlaan 92, B-3001, Leuven, Belgium aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 223/1-2(2000-03-01), 91-107 0378-2697 223:1-2<91 2000 223 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer