The heathers of Europe and adjacent areas

McClintock, David

doi:10.1111/j.1095-8339.1989.tb00162.x

Cited by 17 publications

(16 citation statements)

References 8 publications

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“…This supports the view of McClintock (1989), who regarded E. andevalensis as being closely related to E. mackaiana, and in fact a subspecies of the latter. However, differences in seed size and shape for these two species, with smaller (0.37 -0.38 mm) mostly ovoid seeds for E. andevalensis, and larger (0.4 -0.45 mm) mostly oblong seeds for E. mackaiana.…”

Section: Discussion On Systematic Of the Speciessupporting

confidence: 87%

“…Seventeen populations were studied, covering the whole geographical range of the species (Figure 1). E. mackaiana populations from Ireland are sterile and produce no seeds (Webb, 1955;McClintock, 1971McClintock, , 1989Nelson, 1989). Collected seeds were stored under cold and dry conditions following the procedures of the University of Santiago de Compostela Seedbank (Fagú ndez, 2001).…”

Section: Methodsmentioning

confidence: 99%

“…(Bentham, 1839), with many common characters such as flowers in terminal umbels, appendiculated anthers, and leaves only partially revolute with glandular hairs. E. tetralix has a hairy ovary, while in the other two species it is glabrous (McClintock, 1989). Differences are also found in presence and type of indumentums in leaves and sepals.…”

Section: Introductionmentioning

confidence: 92%

“…Differences are also found in presence and type of indumentums in leaves and sepals. Other taxonomic treatments proposed for this group (McClintock, 1989;Bayer, 1993) Nelson). Bayer (1993) considers the three species, but mentions an alternative treatment that would be three subspecies of E. tetralix.…”

Section: Introductionmentioning

confidence: 99%

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Taxonomic value of seed characters in the Erica tetralix L. group (Ericaceae)

Izco

2004

Plant Biosystems - An International Journal Dealing with all As

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A study of the seed morphology of Erica tetralix and the related species E. mackaiana and E. andevalensis was performed to evaluate the taxonomic importance of seed characters. Size and shape of seeds and surface cells were studied, and area, perimeter, main axis lengths, elongation and sinuosity were measured. Levels of intraspecific variation were considered by means of nested analysis of variance. The study of the intraspecific variation of the characters shows significant differences for lower levels, higher than variations between species for most characters. Levels of variation must be based upon the numerical analysis of seed characters for a correct approach to determining systematic value. E. mackaiana and E. andevalensis group together versus E. tetralix for sinuosity of testa cells. This is a good taxonomic character because it shows significant differences between species and no significant differences between populations. E. tetralix has strongly undulated testa cells while E. mackaiana and E. andevalensis have slightly undulated or curved testa cells. These two species can be discriminated by size of the seed, with seeds of 0.37 -0.38 mm for E. andevalensis and 0.4 -0.45 mm for E. mackaiana. Similarities are found in seed morphology for E. mackaiana and E. andevalensis, but we nevertheless consider the species status for the three taxa as the most natural taxonomic assignment. A key to the species is provided.

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Section: Discussion On Systematic Of the Speciessupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Taxonomic value of seed characters in the Erica tetralix L. group (Ericaceae)

Izco

2004

Plant Biosystems - An International Journal Dealing with all As

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“…†3). Europe and North Africa are another centre of diversity, much larger but also much poorer (only about 20 species) (McClintock 1989). Besides, large numbers of Erica spp.…”

Section: Morphology and Geographic Range Of The Genusmentioning

confidence: 99%

Variation in seed morphology in the genus Erica L. (Ericaceae)

Szkudlarz

2009

Biodiversity: Research and Conservation

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Abstract:Seed morphology was studied in 136 species of Erica, including 123 from South Africa (Cape Floristic Region), 5 from tropical Africa, and 8 from Europe. Seed anatomy was studied in 13 selected species by light and scanning electron microscopy. Seed morphology of each species was described and documented by SEM micrographs. Ten major diagnostic features were selected, concerning seed shape, primary sculpture, and fine relief. On the basis of these features, the species were divided into 14 groups. Within them, 40 morphologically homogeneous subgroups were distinguished, which could possibly be used in future revisions of the genus. A key to species identification has been developed on the basis of seed characteristics. A very close similarity was observed between seeds of some Erica species from distant parts of the distribution range of this genus.

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