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vol.70 issue1WITHIN-POPULATION GENETIC DIVERSITY OF CLIMBING PLANTS AND TREES IN A TEMPERATE FOREST IN CENTRAL CHILEIN THE PATH OF EXTINCTION: THE CASE OF THE MESQUITE PROPOSIS CHILENSIS (FABACEAE) AND THE SPINY FOREST AT THE METROPOLITAN REGION OF CENTRAL CHILE author indexsubject indexarticles search
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Gayana. Botánica

On-line version ISSN 0717-6643

Abstract

MUNERATTO, Junior C  and  SOUZA, Luiz A. FRUIT (PERICARP AND SEED) ONTOGENY OF SIDA SPECIES. Gayana Bot. [online]. 2013, vol.70, n.1, pp.44-56. ISSN 0717-6643.  http://dx.doi.org/10.4067/S0717-66432013000100006.

Fruits (pericarps and seeds) of the weedy species Sida rhombifolia L., S. urens L. and S. regnellii R. E. Fr. were analyzed structurally using light and scanning electron microscopy. The yellowish brown calyx is persistent on the mature fruit and consists of a crystalliferous hypodermis with U-shaped wall thickenings and homogeneous mesophyll. Fruits are schizocarpic, of the subtype coccarium, with a fibrous endocarp. Seeds are exotegmic and the embryos are clearly bent, with folded cotyledons. Structural features that are potentially significant to species' characterization are the structure of the ovary, the morphology of the mericarp apex, the pattern of the reticulate sclerenchymatous endocarp and the presence or absence of nonglandular trichomes in the hilum and funiculus of the seed.

Keywords : Pericarp; seed; Malvaceae; weedy species; ovary.

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