Results 171 to 180 of about 1,430 (195)

FLORAL VARIATION AND DISTYLY IN GUETTARDA SCABRA (RUBIACEAE)

American Journal of Botany, 1993
Controversy exists as to whether the tropical shrub Guettarda scabra (Rubiaceae) is distylous. Variations in stigma and anther position and floral morphology of G. scabra were studied in a population in south Florida. Stigma and anther height have unimodal distributions, but stigma‐anther separation is bimodally distributed and can be used to identify ...
Jennifer H. Richards, Suzanne Koptur
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Cryptic self‐incompatibility and distyly in Hedyotis acutangula Champ. (Rubiaceae)

Plant Biology, 2010
AbstractDistyly, floral polymorphism frequently associated with reciprocal herkogamy, self‐ and intramorph incompatibility and secondary dimorphism, constitutes an important sexual system in the Rubiaceae. Here we report an unusual kind of distyly associated with self‐ and/or intramorph compatibility in a perennial herb, Hedyotis acutangula.
X, Wu, A, Li, D, Zhang
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Arytera distylis

2019
Taxonomic treatment for Arytera ...
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Distyly in Linum pubescens and L. mucronatum

Botanical Journal of the Linnean Society, 1973
In Linum pubescens Banks & Solander and L. mucronatum Bertol. two floral morphs occur, differing in style length, stamen length, size of stigmatic papillae and, in L. mucronatum, exine sculpture of pollen grains. In both species artificial self- and intramorph cross-pollinations were incom, patible.
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Distyly and pollen dimorphism inLinum suffruticosum (Linaceae)

Plant Systematics and Evolution, 1979
The Mediterranean distylousLinum suffruticosum has dimorphic pollen. That from short-styled plants has sub-monomorphic surface excrescences with minute papillae; that from long-styled plants has strongly dimorphic excrescences with conspicuous papillae. The differences are much like those described in species of other sections of the genus.
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Eurypon distyli Santos, França & Pinheiro, 2014, sp. nov.

2014
Published as part of Santos, George Garcia, França, Fernando & Pinheiro, Ulisses, 2014, Three new species of Eurypon Gray, 1867 from Northeastern Brazil (Poecilosclerida; Demospongiae; Porifera), pp. 273-284 in Zootaxa 3895 (2) on pages 280-281, DOI: 10.11646/zootaxa.3895.2.8, http://zenodo.org/record ...
Santos, George Garcia, França, Fernando, Pinheiro, Ulisses   +2 more
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The evolutionary breakdown of distyly inLinum tenuifolium (Linaceae)

Plant Systematics and Evolution, 1985
Distyly inLinum tenuifolium L. is associated with a high degree of self-incompatibility. Breakdown in this system has occurred without the morphological rearrangement expected as the result of cross-over within the distyly supergene. Pollen-flow in both distylous and monomorphic populations is leptokurtic.
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Distyly and heteromorphic incompatibility in oceanic island species ofErythroxylum (Erythroxylaceae)

Plant Systematics and Evolution, 1998
Surveys of oceanic island floras have shown that heterostyly is usually absent in such regions, probably because this floral polymorphism is often associated with a self-incompatibility system. In this context we describe the floral biology of three species ofErythroxylum on La Reunion island and examine the compatibility relationships of one of these ...
T. Pailler, L. Humeau, J. D. Thompson
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Notes on calycophyllous Rubiaceae. Part V. A succinct overview of genera with calycophylls, and a revision of Pteridocalyx (Sipaneeae) with observations on distyly and calycophyll variation

Phytotaxa, 2019
The first part of this paper includes a short discussion on calycophylls in Rubiaceae, followed by a succinct overview of calycophyllous genera and their systematic position within the family (subfamilies and tribes).
P. Delprete
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Dispersal Patterns and the Evolution of Distyly in Oxalis alpina

Systematic Botany, 1978
Individuals from distylous and ti-istylous populations of Oxalis clpiina (Rose) Knuth (section Ionoxalis) from southeastern Arizona were crossed and the fitness of the resultant F1 hybrids analyzed to provide estimates of genetic divergence among populations. Crossability was highest when tristylous individuals were used as seed parents. Ci-osses among
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