Journal
PLANT BIOSYSTEMS
Volume 143, Issue 2, Pages 328-336Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/11263500902722626
Keywords
Ericaceae; Ericeae; Erica; taxonomy; SEM pictures; seed coat
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Funding
- Ministerio de Educacion y Ciencia, Spain [CGL2006-06890]
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Several quantitative and qualitative seed characters of the seven European species of Erica sect. Loxomeria, Eremocallis and Brachycallis were studied. Two main seed types are found based on size and shape: regular ellipsoid or oblong seeds of ca. 0.4 mm for E. ciliaris and the E. tetralix group, and curved to kidney-shaped seeds of 0.6-0.9 mm for E. cinerea, E. maderensis and E. terminalis. The testa surface in E. ciliaris is reticulate, with indented outer periclinal walls. Erica cinerea has inflated outer anticlinal walls. This character is exclusive for this species within the European (and nearby areas) species of the genus. The seeds of E. maderensis are similar to those of E. terminalis. According to seed morphology, the classical infrageneric classification, by which E. terminalis would be grouped with the E. tetralix group in sect. Eremocallis and E. maderensis in sect. Brachycallis with E. cinerea, is artificial.
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