Skip to main content

Taxonomic Significance of Leaflet Anatomy in Mimosa Series Quadrivalves (Leguminosae, Mimosoideae)

Buy Article:

$15.00 plus tax (Refund Policy)

Leaflet anatomy of 14 taxa in sect., series is described for the first time, using cleared leaflets and light microscopy. Members of the series have obliquely asymmetric, linear-oblong, narrowly elliptic, or narrowly oblanceolate leaflets with an eccentric primary vein. The venation pattern is brochidodromous with basal lateral veins. In nine of the 14 taxa the lateral loops become notably narrower in the distal portion (anisonerved loops). On the basis of primary vein size and width, and the nature of the loops, the taxa of the series are divided into two groups, one with isonerved loops and a notably thickened primary vein (massive) and the other with anisonerved loops and a stout or moderately thickened primary vein; the primary vein and secondary veins can be sinuate or straight. Idioblasts were observed in association with the ends of the veinlets. These are of three types: polymorphic sclereids, osteosclereids, and tracheoidal elements. Calcium oxalate prisms and druses are present in most taxa of the series. The first are associated with the vascular bundles, while druses are found in mesophyll cells. The systematic value of leaflet anatomical characters is discussed, and leaflet anatomy is found to provide significant characters for distinguishing groups and individual taxa in series.

Spanish
Se describe por primera vez la anatomía de los folíolos de 14 taxa de Mimosa secc. Batocaulon serie Quadrivalves usando folíolos aclarados y microscopía de luz. Los miembros de la serie tienen folíolos oblicuamente asimétricos, linearoblongos, angostamente elípticos o angostamente oblanceolados, con la vena primaria excéntrica. El patrón de venación es broquidodromo con venas laterales basales. En nueve de los 14 taxa los arcos laterales llegan a ser notablemente más angostos en la porción distal (arcos anisonervados). Con base en el tamaño y la anchura de la vena primaria y la naturaleza de los arcos, los taxa de la serie se dividen en dos grupos, uno con arcos isonervados y venas primarias notablemente engrosadas (masivas) y el otro con arcos anisonervados y venas primarias fuertes o moderadamente engrosadas; las venas primarias y secundarias pueden ser sinuadas o rectas. Se observaron idioblastos asociados a los extremos de las venillas; estos son de tres tipos: esclereidas polimórficas, osteosclereidas y elementos traqueoidales. Se presentan cristales prismáticos y drusas de oxalato de calcio en la mayoría de los taxa de esta serie. Se discute el valor sistemático de los caracteres anatómicos de los folíolos y se encuentra que estos son significativos para distinguir grupos y taxa individuales en la serie Quadrivalves .
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Regular Paper

Publication date: 2004-10-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more