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Ukr. Bot. J. 2017, 74(6): 582–593
Structural Botany

Anatomical and morphological fruit structure in Epilobium hirsutum and E. angustifolium (Onagraceae)

Odintsova A., Klimovych N.

The inner fruit structure in Epilobium hirsutum and E. angustifolium was studied under the light microscopy with the aim to find out new taxonomically significant characters for the genus Epilobium. It was revealed that the studied species have different intensity of longitudinal fruit growth and fruit pubescence: in E. hirsutum fruit is covered with unicellular glandular blunt trichomes of various length while in E. angustifolium it is densely covered with falcate tapering trichomes. The pericarpium is composed of 9–13 cell layers in the facets, and it is thickened in ridges. Exocarpium and endocarpium are one-layered and not lignified. Mesocarpium is composed of tissue with thick non-lignified walls, as also chlorenchyma with some aerial cavities and one to six inner cell layers of the mechanical tissue with lignified cell walls. Fruit wall is supplied by four large septal veins and four dorsal veins, ovule vascular supply is trans-septal. Fruit dehiscence is proceeded through two types of longitudinal fissures located along the dorsal veins and in the middle distance of septa. In the process of dehiscence four T-form lobes with distal portion of septa disjoin from the central column. Central column with proximal portions of septa attached retain unlignified in the fruit center till fall down. The fruit in E. hirsutum and E. angustifolium is defined as the inferior dorsal-septifragal tetralocular many-seeded capsule with synascidiate and symplicate zones. Histogenetical pericarpium structure corresponds to the capsule of Forsythia-type.

Keywords: inferior capsule, pericarpium structure, gynoecium zones, septifragal fruit dehiscence, histogenetical fruit type

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  1. Antoń S., Denisow B., Komoń-Janczara E., Targoński Z. Nectary and gender-biased nectar production in dichogamous Chamaenerion angustifolium (L.) Scop. (Onagraceae). Plant Spec. Biol., 2017: 1–12.
  2. Artjuschenko Z.T., Theodorov Al.A. Atlas po opisatelnoy morfologyi vysshykh rastenyi. Plod (Organographia illustrata plantarum Vascularium. Fructus), Leningrad: Nauka, 1986, 392 pp.
  3. Barykina R.P., Veselova T.D., Deviatov A.G., Djalilova H.H., Iljina G.M., Chubatova N.V. Spravochnik po botanicheskoj mikrotekhnike. Osnovy i metody (Handbook of the botanical microtechniques), Moscow: Moscow Univ. Press, 2004, 287 pp.
  4. Baum D.A., Sytsma K.J., Hoch P.C. A Phylogenetic Analysis of Epilobium (Onagraceae) based on Nuclear Ribosomal DNA Sequences. Syst. Bot., 1994, 19(3): 363–388.
  5. Baumann-Bodenheim M.G. Prinzipien eines Fruchtsystems der Angiospermen. 1. Ber. Schweiz. Bot. Ges., 1954, 64: 94–112.
  6. Bobrov A.V., Melikian A.P., Romanov M.S. Morfogenez plodov Magnoliophyta (Morphogenesis of fruits of Magnoliophyta), Moscow: Librokom, 2009, 400 pp.
  7. Bunniger L., Weberling F. Untersuchungen über die morphologische Natur des Hypanthiums bei Myrtales–Familien. I. Onagraceae. Beitr. Biol. Pflanzen, 1968, 44(3): 447–477.
  8. De Vos O.S. Ontogeny and vascularisation of the flower of Oenothera (Onagraceae). Acta Bot. Neerl., 1981, 30(3): 219–229.
  9. Dobrochaeva D.M. OnagroviOnagraceae Lindl. In: Flora URSR. Eds M.V. Klokov, O.D. Visiulina, Kyiv: Izd-vo AN URSR, 1955, vol. 7, pp. 410–445.
  10. Eyde R.H. Evolution and systematics of the Onagraceae: floral anatomy. Ann. Missouri Bot. Gard., 1982, 69(4): 735–747.
  11. Hertel R.J.G. Contribuições para a fitologia teórica II. Algunas concepções na carpologia. Hum. Curitiba, 1959, 4: 1–43.
  12. Kaden N.N. Bot. Zhurn., 1962, 47(4): 495–505.
  13. Kaden N.N. Bot. Zhurn., 1965, 50(6): 775–787.
  14. Kytövuori I. The Alpinae group of the genus Epilobium in northernmost Fennoscandia. A morphological, taxonomical and ecological study. Ann. Bot. Fennici, 1972, 9: 163–203.
  15. Leinfellner W. Der Bauplan des synkarpen Gynözeums. Österr. bot. Z., 1950, 97: 403–436.
  16. Leins P., Erbar C. Flower and fruit: Morphology, ontogeny, phylogeny, function and ecology, Stuttgart: Schweizerbart, 2010, 439 pp.
  17. Levin R.A., Wagner W.L., Hoch P.C., Nepokroeff M., Pires J.C., Zimmer E.A., Sytsma K.J. Family-level relationships of Onagraceae based on chloroplast rbcL and ndhL data. Amer. J. Bot. 2003, 90(1): 107–115.
  18. Levina R.E. Morfologiya i ekologiya plodov (Morphology and ecology of fruits). Leningrad: Nauka, 1987, 160 pp.
  19. Mosyakin S.L., Fedoronchuk M.M. Vascular plants of Ukraine. A nomenclatural checklist, Kiev, 1999, xxiii + 345 pp.
  20. Odintsova A. Stud. Biol., 2016, 10(3–4): 129–140.
  21. Raven P.H. A Revision of the african species of Epilobium (Onagraceae). Bothalia, 1967, 9(2): 309–333.
  22. Raven P.H. Generic and sectional delimitation in Onagraceae tribe Epilobieae. Ann. Missouri Bot. Gard., 1976, 63(2): 326–340.
  23. Rostański K., Rostański A., Gerold-Śmietańska I., Wąsowicz P. Evening-Primroses (Oenothera) occurring in Europe, Katowice-Kraków: Wyd. Polish Acad. Sci., 2010, 157 pp.
  24. Roth I. Fruits of Angiosperms. In: Encyclopedia of Plant Anatomy. Eds W. Zimmermann, S. Carlquist, P. Ozenda, H.D. Wulff, Berlin: G. Borntraeger, 1977, Bd 10, Teil 1, pp. 200–675.
  25. Seavey S.R., Magill R.E., Raven P.H. Evolution of seed size, shape and surface architecture in the tribe Epilobieae (Onagraceae). Ann. Missouri Bot. Gard., 1977, 64(1): 18–47.
  26. Shabes L.K., Morozova A.A. Onagraceae. In: Sravnitelnaya anatomiya semiyan (Comparative seed anatomy). Ed. A. Takhtajan, St. Petersburg: Mir i semiya, 1996, vol. 5, pp. 236–242.
  27. Snogerup S. Chamerion. Epilobium. In: Flora Nordica. Eds B. Jonsell, Th. Karlsson, Stockholm: The Swedish museum of natural history, 2010, vol.6, pp. 89–131.
  28. Solomon J.C. The systematics and evolution of Epilobium (Onagraceae) in South America. Ann. Missouri Bot. Gard., 1982, 69(2): 239–335.
  29. Spjut R.W. A systematic treatment of fruit types. Mem. New York Bot. Gard., 1994, 70: 1–182.
  30. Strgulc Krajšek S., Dermastia M., Jogan N. Determination key for Central European Epilobium species based on trichome morphology. Bot. Helv., 2006, 2: 169–178.
  31. Strgulc Krajšek S., Kreft S., Klandnik A., Draslar K., Jogan N., Dermastia M., Morphology and glandular activity of unicellular trichomes of Epilobium hirsutum. Biol. Plant., 2011, 55(1): 149–152.
  32. Takhtajan A. Flowering Plants. 2 edition, Berlin: Springer Science+Business Media B.V., 2009, 871 pp.
  33. Van Tieghem M.Ph. Recherches sur la structure du pistil et sur l'anatomie comparée de la fleur. Mém. Prés. Divers Savants Acad. Sci. Inst. Impérial France, Sér. 2, 1871, 21: 1–261 pp.
  34. Wagner W.L., Hoch P.C. Onagraceae. The Evening Primrose Family website. 2005, available at: [Accessed 15.07.2017]
  35. Wagner W.L., Hoch P.C., Raven P.H. Revised classification of the Onagraceae. Syst. bot. monogr., 2007, 83: 1–240.