Keywords
carpology
seed sculpture
fine relief
seed coat
cluster analysis
Cape Floristic Region
How to Cite
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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.
References
Alm C. G. & Fries T. C. E. 1927. Monographie der Gattungen Philippia Klotzsch, Mitrastylus nov. gen. und Ericinella Klotzsch. Kungliga Svenska vetenska-psakademiens handlingar, ser. 3, 4(4): 1-49.
Artopoeus A. 1903. Über den Bau und Öffnungsweise der Antheren und die Entvicklung der Samen der Ericaceen. Flora 92: 309-379.
Baker H. A. & Oliver E. G. H. 1967. Ericas in southern Africa. LXVI+180 pp. Purnell, Cape Town, Johannesburg.
Bayer E. 1993. Erica. In: S. Castrovieyo, C. Aedo, C. Gómez Campo, M. Laínz, P. Montserrat, R. Morales, F. Muńoz Garmendia, G. Nieto Feliner, E. Rico, S. Talavera & L. Villar (eds.). Flora Iberica, 4, 485-506 pp. Real Jardín Botánico C. S. I. C. Madrid.
Barthlott W. 1981. Epidermal and seed surface characters of plants: systematic applicability and some evolutionary aspects. Nordic Journal of Botany 1(3): 345-355.
Barthlott W. & Ehler N. 1977. Raster-Elektronen-mikroskopie der epidermis-Oberflächen von Spermatophyten. Trop. Subtrop. Pflanzenwelt. Akad. Wiss. Lit. Mainz 30: 1-113.
Barthlott W. & Voit G. 1979. Mikromorphologie der Samenschalen und Taxonomie der Cactaceae: Ein raster-elektronenmikroskopischer Uberblick. Plant Systematic and Evolution 132: 205-229.
Barthlott W. & Ziegler B. 1981. Mikromorphologie der Samenschalen als systematisches Merkmal bei Orchideen. Ber. Deutsch. Bot. Ges. 94.
Beijerinck W. 1940. Calluna. A monograph on the Scotch heather. Verhandelingen der Koninklijke Nederlandsche Akademie van Wetenschappen, Afdeeling Natuurkunde. (Tweede Sectie), 38(4): 1-180.
Bentham G. 1839. Ericaceae. In: A. P. De Candolle, Prodromus systematis naturalis regni vegetabilis 7: 580-733. Treutel & Weiss, Paris.
Bertsch K. 1941. Früchte und Samen. Verlag Ferdinand Enke, Stuttgart.
Corner E. J. H. 1976. The seeds of dicotyledones. Cambridge University Press, Cambridge, 2 vols.
Don D. 1834. An attempt an a new arrangement of the Ericaceae. Edinburgh New Philosophical Journal 17: 150-160.
Dulfer H. 1965. Revision der südafrikanischen Arten der Gattung Erica L. Annalen des Naturhistorischen Museums, Wien 68: 25-177.
Fagúndez J. & Izco J. 2003a. Seed morphology of Erica L. sect. Chlorocodon Bentham. Acta Botanica Gallica 150(4): 401-410.
Fagúndez J. & Izco J. 2003b. Seed morphology of Erica L. sect. Callicodon Bentham. Taxonomic implications. Plant Biosystems 138(3): 207-213.
Fagúndez J. & Izco J. 2004a. Taxonomic value of seed characters in the Erica tetralix L. group (Ericaceae). Plant Biosystems 137(1): 111-116.
Fagúndez J. & Izco J. 2004b. Seed morphology of Erica L. sect. Tylospora Salisb. Ex I. Hansen. Israel Journal of Plant Sciences 52: 341-346.
Fagúndez J. & Izco J. 2004c. Seed morphology of Daboecia (Ericaceae). Belgian Journal of Botany 137(2): 188-192.
Fraga M. I. 1984. Valor taxonómicode la morfologia de las semillas en las especies del genero Erica presentes en el NO de Espańa. Acta Botanica Malacitana 9: 147-152.
Gleisberg W. 1922. Vergleichende Blüten- und Fruchtanatomie der Vaccinium oxycoccus-Typen. Berichte der Deutschen Botanischen Gesellschaft 40: 202-212.
Guthrie F. & Bolus H. 1905. Erica. In: W. T. Thistleton-Dyer (ed.). Flora Capensis 4: 4-315.
Hansen I. 1950. Die europäischen Arten der Gattung Erica L. Botanische Jahrbücher 75: 1-81.
Huckerby E., Marchant R. & Oldfield F. 1972. Identification of fossil seeds of Erica and Calluna by scanning electron microscopy. New Phytologist 71: 387-392.
Klotzsch J. F. 1838. Ericearum genera et species. Linnaea 12: 211-247.
Kuźniewska E. 1980. Badania morfologii nasion skalnic przeprowadzone na elektronowym mikroskopie skaningowym. Opolskie Tow. Przyjaciół Nauk, Zeszyty Przyrodnicze 19: 19-45.
Linnaeus C. 1753. Species Plantarum. 1200 pp. Stockholm.
McGuire A. F. & Kron K. A. 2005. Phylogenetic relationships of European and African Ericas. International Journal of plant sciences 166(2): 311-318.
McClintock D. 1989. The heather of Europe and adjacent areas. Botanical Journal of the Linnean Society 101: 279-289.
Minuto L., Fior S., Roccotiello E. & Casazza G. 2006. Seed morphology in Moehringia L. and its taxonomic significance in comparative studies within the Caryophyllaceae. Plant Systematics and Evolution 262: 189-208.
Netolitzky F. 1926. Anatomie der Angiospermen Samen. In: K. Linsbauer (ed.). Handbuch der Pflanzenanatomie. Abt. II, T. 2, Bd. X, Berlin.
Niedenzu F. 1890. Über der anatomischen Bau der Labblätter der Arbutoideae und Vaccinioideae in Beziechung zu ihrer systematische Gruppierung und geographischen Verbreitung. Botanische Jahrbücher 11: 134-263.
Oh I.-C., Anderberg A.-L., Schonenberger J. & Anderberg A. A. 2008. Comparative seed morphology and charakter evolution in the genus Lysimachia (Myrsinaceae) and related taxa. Plant Systematics and Evolution 271: 177-197.
Oliver E. G. H. 1967. Three new species of Erica. Journal of South African Botany 33(3): 197-204
Oliver E. G. H. 1976. Studies in the Ericoideae. I. The genera Eremia and Eremiella. Bothalia 12(1): 29-48.
Oliver E. G. H. 1980. Studies in the Ericoideae. III. The genus Grisebachia. Bothalia 13(1-2): 65-93.
Oliver E. G. H. 1984. Studies in the Ericoideae. IV. New species and some taxonomic and nomenclatural changes in the Cape Flora Region. S.-Afr. Tydskr. Plantk. 3(5): 267-284.
Oliver E. G. H. 1985. A new species of Philippia, from the Drakensberg. Bothalia 15(3-4): 550-551.
Oliver E. G. H. 1986. A new species of Ericinella from the Southern Drakensberg. Bothalia 16(1): 46-48.
Oliver E. G. H. 1987a. Studies in the Ericoideae (Ericaceae). V. The genus Coilostigma. Bothalia 17(2): 163-170.
Oliver E. G. H. 1987b. Studies in the Ericoideae (Ericaceae). VII. The placing of the genus Philippia into synonymy under Erica; the southern African species. South African Journal of Botany 53(6): 455-458.
Oliver E. G. H. 1988. Studies in the Ericoideae (Ericaceae). VI. The generic relationshipbetween Erica and Philippia in southern Africa. Bothalia 18(1): 1-10.
Oliver E. G. H. 1990. New species of Erica (Ericaceae) from the Cape Province. Bothalia20(1): 41-48.
Oliver E. G. H. 1991. The Ericoideae (Ericaceae) - a review. In: H. P. Linder & A. V. Hall (eds.). Systematics, biology and evolution of some South African taxa. Contributions from the Bolus Herbarium 13: 158-208.
Oliver E. G. H. 1992. Studies in the Ericoideae (Ericaceae). VIII. New combinations for Philippia are made in Erica for the Flora Zambesiaca Region. Kew Bulletin 47(4): 665-668.
Oliver E. G. H. 1993a. Studies in the Ericoideae (Ericaceae). XII. The placing of the genus Blaeria into synonymy under Erica; nomenclatural and taxonomic changes for the southern African region. Bothalia 23(1): 1-7.
Oliver E. G. H. 1993b. Studies in the Ericoideae (Ericaceae). XIII. Three new species of Erica from the southwestern Cape. Bothalia 23(1): 9-14.
Oliver E. G. H. 1994. Studies in the Ericoideae (Ericaceae). XV. The generic relationship between Erica and Ericinella. Bothalia 24(2): 121-126.
Oliver E. G. H. 2000. Systematics of Ericeae (Ericaceae: Ericoideae): species with indehiscent and partially dehiscent fruits. Contributions from the Bolus Herbarium 19: 1-483.
Oliver E. G. H. & Oliver I. M. 1991. Studies in the Ericoideae (Ericaceae). VIII. New species of Erica, section Pseuderemia, from southern Africa. Bothalia 21(2): 137-142.
Oliver E. G. H. & Oliver I. M. 1995a. Studies in the Ericoideae (Ericaceae). XVI. Six new species of Erica from the Western Cape, South Africa. Bothalia 25(1): 87-95.
Oliver E. G. H. & Oliver I. M. 1995b. Studies in the Ericaceae (Ericoideae). XVIII. Two new species of Erica from the southern part of South Africa. Feddes Repertorium 106(5-8): 347-352.
Oliver E. G. H. & Oliver I. M. 1996a. Studies in the Ericaceae (Ericoideae). XIX. Two new species of Erica from southern Africa. Feddes Repertorium 107(5-6): 305-310.
Oliver E. G. H. & Oliver I. M. 1996b. Studies in the Ericaceae (Ericoideae). XX. A rare new species of Erica from South Africa. Yearbook of the Heather Society 1996: 1-5.
Oliver E. G. H. & Oliver I. M. 1997. A new species of Erica from the Western Cape. Bothalia 27(2): 142-144.
Oliver E. G. H. & Oliver I. M. 1999a. Two new species of Erica from Western Cape, South Africa. Bothalia 29(1): 95-98.
Oliver E. G. H. & Oliver I. M. 1999b. Three new species of Erica from Western Cape, South Africa. Bothalia 29(1): 112-117.
Oliver E. G. H. & Oliver I. M. 1999c. Erica hanekomii, a new prostrate species from the Western Cape, South Africa. Yearbook of the Heather Society 1999: 36-42.
Oliver E. G. H. & Oliver I. M. 2000a. Erica kirstenii, a new rock-loving species from South Africa. Yearbook of the Heather Society 2000: 57-62.
Oliver E. G. H. & Oliver I. M. 2000b. Erica ignita, a showy new species from South Africa. Yearbook of the Heather Society 2000: 63-68.
Oliver E. G. H. & Oliver I. M. 2000c. Two new species of Erica from Western Cape, South Africa. Bothalia 30(1): 49-53.
Oliver E. G. H. & Oliver I. M. 2000d. Three new species of Erica (Ericaceae) from Western Cape, South Africa. Bothalia 30(2): 147-153.
Oliver E. G. H. & Oliver I. M. 2001a. Four new species of Erica (Ericaceae) from Western Cape, South Africa. Bothalia 31(1): 1-8.
Oliver E. G. H. & Oliver I. M. 2001b. Five new species of Erica (Ericaceae) from the Swartberg Range, Western Cape, South Africa and a note on E. esterhuyseniae. Bothalia 31(2): 155-165.
Oliver E. G. H. & Oliver I. M. 2002a. The genus Erica (Ericaceae) in southern Africa: taxonomic notes 1. Bothalia 32(1): 37-61.
Oliver E. G. H. & Oliver I. M. 2002b. Six new species and one new subspecies of Erica (Ericaceae) from Western Cape, South Africa. Bothalia 32(2): 167-180.
Oliver E. G. H. & Oliver I. M. 2002c. A new rock-loving species of Erica from the eastern Swartberg, South Africa. Yearbook of the Heather Society 2002: 31-36.
Oliver E. G. H. & Oliver I. M. 2004. Two new species of Erica (Ericaceae); one from Western Cape and one from KwaZulu-Natal, South Africa. Bothalia 34(1): 11-15.
Oliver E. G. H. & Oliver I. M. 2005 The genus Erica (Ericaceae) in southern Africa: taxonomic notes 2. Bothalia 35(2): 121-148.
Oliver E. G. H., Oliver I. M. & Volk F. W. 1997. Studies in the Ericaceae (Ericoideae), XXI. Erica oakesiorum, a new tree species from South Africa. Yearbook of the Heather Society 1997: 13-18.
Oliver I. M. & Oliver E. G. H. 2000. Ericas of the Cape Peninsula. Protea Atlas Project NBI, Cape Town.
Peltrisot M. C.-N. 1904a. Developpement et structure de la graine chez les Ericacees. Journal de botanique 18: 309-367.
Peltrisot M. C.-N. 1904b. Developpement et structure de la graine chez les Ericacees. Journal de botanique 18: 386-402.
Phillips E. P. 1951. The Genera of South African Flowering Plants. 2nd edn, pp. 558-562. Division of Botany and Plant Pathology, Pretoria.
Salisbury R. A. 1802. Species of Erica. Transactions of the Linnean Socjety 6: 316-388.
Salter T. M. 1950. Erica. In: Adamson R. & Salter T. M. (eds.). Flora of the Cape Peninsula, pp. 626-662. Juta, Cape Town.
Schumann D. & Kirsten G. 1992. Ericas of South Africa. 272 pp. Fernwood Press. Vlaeberg.
Stevens P. F. 1971. A classification of the Ericaceae: subfamilies and tribes. Bot. J. Linn. Soc. 64: 1-53.
Stevens P. F., Luteyn J., Oliver E. G. H., Bell T. L., Brown E. A., Crowden R. K., George A. S., Jordan G. J., Ladd P., Lemson K., McLean C. B., Menadue Y., Pate J. S., Stace H. M. & Weiller C. M. 2004. Ericaceae. In: K. Kubitzki (ed.). The Families and Genera of Vascular Plants, 6, pp. 145-194. Springer-Verlag, Berlin-Heidelberg-New York.
Szkudlarz P. 2001. Morphological and anatomical structure of seeds in the family Ericaceae. Biological Bulletin of Poznań 38(2): 113-132.
Szkudlarz P. 2006. Taxonomy of South African ericas (Erica L.) and differentiation of their seeds. Biodiv. Res. Conserv. 1-2: 25-30.
Szkudlarz P. 2008. Some notes on the morphology and anatomy of seeds of two similar heathers, Erica carnea and E. erigena. Dendrobiology 59: 51-55.
Takhtajan Ł. A. 1992. Ericaceae. Sravnitielnaya anatomiya syemyan 4: 25-35. Saint Petersburg.
Thunberg C. P. 1785. Dissertatio Botanica de Erica. 62 pp. Uppsala.
Turner R. C. & Oliver E. G. H. 2006. Two new species of Erica (Ericaceae) from the Langeberg, Western Cape, South Africa. Bothalia 36(1): 33-37.
Ward J. H. 1963. Hierarchical grouping to optimize an objective function. Journal of American Statistical Association 58(301): 236-244.
Webb D. A. & Rix E. M. 1972. Erica. In: T. G. Tutin & V. H. Heywood (eds.). Flora Europaea, 3, 5-8. pp. Cambridge Univ. Press. Cambridge.
Winton A. L. 1902. Beiträge zur Anatomie des Beerenobestes. Zeitschrift für Untersuchung der Nachrungsund Genussmittel 5: 785-814.