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- Title
ESTUDIOS SOBRE LA VARIACIÓN ESTRUCTURAL DE LA SINFLORESCENCIA EN EL GÉNERO AXONOPUS (POACEAE, PANICOIDEAE, PANICEAE): TIPOLOGÍA Y TENDENCIAS EVOLUTIVAS.
- Authors
Giraldo-Cañas, Diego
- Abstract
Synflorescence typology of Neotropical genus Axonopus P. Beauv. was studied using the methodology and the terminology of Troll's school. Fifty two species of ca. 75 species of Axonopus were analized. In all taxa the synflorescence is polytelic and truncate. According to this study, the plesiomorphic flowering unit is found in the series Barbigeri G. A. Black. The synflorescence could be derived from an ancestral form by the following evolutionary steps: 1.- truncation of the main axis; 2.-complete homogenization; 3.- reduction of the short paracladia; 4.- decrease of the number of long paracladia; 5.- truncation of the long paracladia. Morphological relationships are discussed and some probable evolutionary trends are outlined.
- Subjects
AXONOPUS; PLANT chemical analysis; CLADISTIC analysis of plants; FOLIAR diagnosis; INFLORESCENCES; PLANT classification
- Publication
Darwiniana, 2000, Vol 38, Issue 3/4, p209
- ISSN
0011-6793
- Publication type
Article