The Living Collection at the Royal Botanic Garden Edinburgh Illustrates the Floral Diversity in Streptocarpus (Gesneriaceae)
DOI:
https://doi.org/10.24823/Sibbaldia.2019.272Abstract
A visual summary of the floral types present in the diverse genus Streptocarpus is given along with descriptions of the different categories. We categorised the species and defined seven types and six sub-types. The use of a comprehensive and well-curated living collection for the study of floral diversification is presented and its use for interpretation and education discussed.
References
BELLSTEDT, D.U. & EDWARDS, T.J. (2004). A new species of Streptocarpus (Gesneriaceae) from the Pondoland Coast, South Africa. Edinburgh Journal of Botany, 60(3): 409–414.
DAFNI, A. (1992). Pollination Ecology: A Practical Approach. Oxford University Press, Oxford.
DARBYSHIRE, I. & MASSINGUE, A.O. (2014). Two new species of Streptocarpus (Gesneriaceae) from tropical Africa. Edinburgh Journal of Botany, 71(1): 3–13.
DARWIN, C.R. (1862). On the Various Contrivances by Which British and Foreign Orchids are Fertilised by Insects, and on the Good Effect of Intercrossing. John Murray, London.
DELPINO, F. (1873–1874). Ulteriori osservazioni e considerazioni sulla dicogamia nel regno vegetale. Atti della Societa Italiana di Scienze Naturali, 16: 151–349; 17: 266–407.
DOLE, J.A. (1992). Reproductive assurance methods in three taxa of the Mimulus guttatus complex (Scrophulariaceae). American Journal of Botany, 79(6): 605–659.
FAEGRI, K. & VAN DER PIJL, L. (1966). The Principles of Pollination Ecology. Pergamon Press, Oxford.
FRENCH, G.C., ENNOS, R.A., SILVERSIDE, A.J. & HOLLINGSWORTH, P.M. (2005). The relationship between flower size, inbreeding coefficient and inferred selfing rate in British Euphrasia species. Heredity, 94(1): 44–51.
GEORGIADIS, P. (2005). Developmental and genetic dissection of floral morphology in Streptocarpus. Unpublished MSc Thesis, University of Edinburgh, Edinburgh.
GOLDBLATT, P. & MANNING, J.C. (2000). The long proboscid fly pollination system in southern Africa. Annals of the Missouri Botanical Garden, 87(2): 146–70.
HANDRO, W. (1976). On the flower initiation in Streptocarpus nobilis C.B.Clarke (Gesneriaceae). Boletim de Botânica da Universidade de São Paulo, 4: 31–40.
HARRISON, C.J., MÖLLER, M. & CRONK, Q.C.B. (1999). Evolution and development of floral diversity in Streptocarpus and Saintpaulia. Annals of Botany, 84(1): 49–60.
HILLIARD, O.M. (2002). The genus Agalmyla (Gesneriaceae-Cyrtandroideae). Edinburgh Journal of Botany, 59(1): 1–210.
HILLIARD, O.M. & BURTT, B.L. (1971). Streptocarpus – An African Plant Study. Natal University Press, Pietermaritzburg.
HUGHES, M., MACMASTER, G., MÖLLER, M., BELLSTEDT, D.U. & EDWARDS, T.J. (2006). Breeding system of a plesiomorphic floral type: An investigation of small flowered Streptocarpus (Gesneriaceae) species. Plant Systematics and Evolution, 262(1): 13–24.
HUGHES, M., MÖLLER, M., BELLSTEDT, D.U., EDWARDS, T.J. & DE VILLIERS, M. (2005). Refugia, dispersal and divergence in a forest archipelago: A study of Streptocarpus in eastern South Africa. Molecular Ecology, 14(14): 4415–4426.
HUMBERT, H.† (POSTHUMOUS IN PART BY BURTT, B.L. & KERAUDREN-AYMONIN, M.) (1971). Gesnériacées. In: LEROY, J.-F., Flore de Madagascar et des Comores. Muséum national d’Histoire naturelle, Paris, pp. 47–163.
JOHNSON, S.D. & RAGUSO, R.A. (2016). The long-tongued hawkmoth pollinator niche for native and invasive plants in Africa. Annals of Botany, 117(1): 25–36.
LAWRENCE, W.J.C. (1943). Photoperiodism in Streptocarpus. Gardener’s Chronicle, 3(113): 156.
MARTINS, D.J. (2008). Pollination observations of the African Violet in the Taita Hills, Kenya. Journal of East African Natural History, 97(1): 33–42.
MÖLLER, M. (2018). Nuclear DNA 1C values are uncorrelated with pollen size but linked to phylogenetic descent in Streptocarpus (Gesneriaceae). South African Journal of Botany, 114: 323–344.
MÖLLER, M., ATKINS, H.J., BRAMLEY, G.L.C., MIDDLETON, D.J., BAINES, R., NGUYEN, V.D., QUANG, B.H. & BARBER, S. (2018). Two new species of Oreocharis (Gesneriaceae) from northern Vietnam. Edinburgh Journal of Botany, 75(3): 309-319.
MÖLLER, M. & CRONK, Q.C.B. (1997a). Origin and relationships of Saintpaulia (Gesneriaceae) based on ribosomal DNA internal transcribed spacer (ITS) sequences. American Journal of Botany, 84(8): 956–965.
MÖLLER, M. & CRONK, Q.C.B. (1997b). Phylogeny and disjunct distribution: Evolution of Saintpaulia (Gesneriaceae). Proceedings of the Royal Society of London, Series B, 264: 1827–1836.
MÖLLER, M. & CRONK, Q.C.B. (2001). Phylogenetic studies in Streptocarpus (Gesneriaceae): Reconstruction of biogeographic history and distribution patterns. Systematics and Geography of Plants, 71(2): 545–555.
MÖLLER, M., MIDDLETON, D.J., NISHII, K., WEI, Y.G., SONTAG, S. & WEBER, A. (2011). A new delineation for Oreocharis incorporating an additional ten genera of Chinese Gesneriaceae. Phytotaxa, 23: 1–36.
MÖLLER, M., NAMPY, S., JANEESHA, A.P. & WEBER, A. (2017). The Gesneriaceae of India: Consequences of updated generic concepts and new family classification. Rheedea, 27(1): 23–41.
NISHII, K., HUGHES, M., BRIGGS, M., HASTON, E., CHRISTIE, F., DEVILLIERS, M.J., HANEKOM, T., ROOS, W.G., BELLSTEDT, D.U. & MÖLLER, M. (2015). Streptocarpus redefined to include all Afro-Malagasy Gesneriaceae: Molecular phylogenies prove congruent with geography and cytology and uncovers remarkable morphological
homoplasies. Taxon, 64(6): 1243–1274.
NITSCH, J.P. (1967). Streptocarpus nobilis, plante de jours courts. Bulletin de la Société Botanique de France, 114: 128–132.
OLLERTON, J., ALARCÓN, R., WASER, N.M., PRICE, M.V., WATTS, S., CRANMER, L., HINGSTON, A., PETER, C. & ROTENBERRY, J. (2009). A global test of the pollination syndrome hypothesis. Annals of Botany, 103: 1471–1480.
OLLERTON, J., WINFREE, R. & TARRANT, S. (2011). How many flowering plants are pollinated by animals? Oikos, 120(3): 321–326.
POTGIETER, C.J. & EDWARDS, T.J. (2005). The Stenobasipteron wiedemanni (Diptera, Nemestrinidae) pollination guild in Eastern Southern Africa. Annals of the Missouri Botanical Garden, 92(2): 254–267.
PROCTOR, M., YEO, P. & LACK, A. (1996). The Natural History of Pollination. Timber Press, Portland, OR.
RAE, D. (2006). Developing a new collection policy for the living collection of plants at the Royal Botanic Garden Edinburgh. Sibbaldia, 4: 9–23.
RANDRIANASOLO, A., PHILLIPSON, P.B., LOWRY II, P.P & MÖLLER, M. (2018). Streptocarpus peltatus (Gesneriaceae), a distinctive new species from Southeastern Madagascar. Novon, 26(1): 22–27.
VOGEL, S.T. (1978). Evolutionary shifts from reward to deception in pollen flowers. In: RICHARDS, A.J. (ed.) The Pollination of Flowers by Insects. Academic, London, pp. 89–96.
WEBER, A., WEI, Y.G., PUGLISI, C., WEN, F., MAYER, V. & MÖLLER, M. (2011). A new definition of the genus Petrocodon (Gesneriaceae). Phytotaxa, 23: 49–67.
WEBERLING, F. (1981). Morphologie der Blüten und der Blütenstände. Eugen Ulmer, Stuttgart.
WEIGEND, M. & EDWARDS, T.J. (1996). The palynology of Streptocarpus and the other African and Malagasy Gesneriaceae and its systematical implications. Botanische Jahrbücher für Systematik, 118: 59–80.
WESTERKAMP, C. & CLASSEN-BOCKHOFF, R. (2007). Bilabiate flowers: The ultimate response to bees? Annals of Botany, 100(2): 361–374.
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