Advertisement

Dracaenaceae

  • J. J. Bos
Chapter
Part of the The Families and Genera of Vascular Plants book series (FAMILIES GENERA, volume 3)

Abstract

Trees, shrubs, sometimes scandent, unbranched suffrutices or rhizomatous geophytes, sometimes succulent, glabrous, from less than 10 cm to over 40 m tall. Aerial stems often showing characteristic persistent leaf scars. Leaves alternate, distichously or spirally arranged, entire, ovate, strap-shaped or ensiform, usually amplexicaul with a sheathing base, occasionally exceeding 2 m in length, usually much shorter, sometimes variegated, the upper ones gradually to rather abruptly transformed into the inflorescence bracts. Inflorescence terminal, sometimes apparently axillary on leafless dwarf shoots, racemose, capitulate to paniculate; floral bracts and bracteoles often obsolescent. Flowers often grouped together on articulated pedicels with a longer or shorter pericladium, usually white, sometimes flushed with green or purple, fragrant, nocturnal. Perianth with a shorter or longer tube and 6 equal segments. Stamens 6, as long as the free perianth lobes and inserted at their base in the throat; filaments often inflated and spindle-shaped; anthers versatile, opening latrorsely. Ovary superior, cylindrical to bottle-shaped, with 3 locules, each containing a single ovule; septal nectaries present; the style equaling the stamens; stigma capitate to shallowly 3-lobed. Fruit a thin-walled berry, (depressed-) globose or ellipsoid, sometimes 2- or 3-lobed, usually bright orange when ripe, containing up to 3 large seeds lacking a testa but enclosed in an obsolescent layer of sclerotic endocarp cells.

Keywords

General Reference Female Gametophyte Extrafloral Nectary Floral Bract Primary Vein 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Selected Bibliography

  1. Baker, J.G. 1875. Revision of the species and genera of the Asparagaceae. J. Linn. Soc. Bot. 14: 508–632.Google Scholar
  2. Bos, J.J. 1980. Dracaena surculosa Lindl. Misc. Pap. Landbouwhogesch. Wageningen 19: 71–79.Google Scholar
  3. Bos, J.J. 1984. Dracaena in West Africa. Agric. Univ. Wag. Pap. 84–1: 1–125.Google Scholar
  4. Bos, J.J., Cullen, J. 1986. Dracaena. In: Walters, S.M., Brady, A., Brickell, C.D., Cullen, J., Green, P.S., Lewis, J., Matthews, V.A., Webb, D.A., Yeo, P.F., Alexander, J.C.M. (eds.) European garden flora 1: 285–287. Cambridge: Cambridge Univ. Press.Google Scholar
  5. Bos, J.J., Obermeyer, A.A. 1992. Dracaenaceae. In: Leistner, O.A. (ed.) Flora South. Africa 5, 3. Pretoria: Nat. Bot. Inst. pp. 1–9.Google Scholar
  6. Bos, J.J., Graven P., Hetterscheid, W.L.A., Wege, J.J. van de 1993. Wild and cultivated Dracaena fragrans. Edinb. J. Bot. 49: 311–331.Google Scholar
  7. Brown, N.E. 1915. Sansevieria: a monograph of all the known species. Bull. Misc. Inf. R. Bot. Gard. Kew 1915: 185–261. Gave, M.S. 1955. Sporogenesis in the female gametophyte of Phormium tenax. Phytomorphology 5: 247–253.Google Scholar
  8. Cheadle, V.I. 1937. Secondary growth by means of a thickening ring in certain monocotyledons. Bot. Gaz. 98: 535–555.Google Scholar
  9. Dahlgren, R.M.T. et al. 1985. See general references. Erdtman, G. 1952. See general references.Google Scholar
  10. Goldblatt, P. (ed.) 1981. Index to plant chromosome numbers 1975–1978. Monogr. Syst. Bot. Mo. Bot. Gard. 5: 309–310.Google Scholar
  11. Goldblatt, P. (ed.) 1985. Index to plant chromosome numbers 1982–1983. Monogr. Syst. Bot. Mo. Bot. Gard. 13: 121.Google Scholar
  12. Goldblatt, P. (ed.) 1988. Index to plant chromosome numbers 1984–1985. Monogr. Syst. Bot. Mo. Bot. Gard. 23: 137.Google Scholar
  13. Hegnauer, R. 1963, 1986. See general references.Google Scholar
  14. Huber, H. 1969. See general references.Google Scholar
  15. Hutchinson, J. 1973. The families of flowering plants. Oxford: Clarendon Press.Google Scholar
  16. Linnaeus, C. 1762. Species Plantarum, 2nd edn. Holmiae (Stockholm ): Impensis Direct. Laurentii Salvii.Google Scholar
  17. Zimmermann, M.H., Tomlinson, P.B. 1970. The vascular system in the axis of Dracaena fragrans (Agavaceae). 1. Distribution and development of secondary vascular tissue. J. Arnold Arbor. 51: 478–491.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • J. J. Bos

There are no affiliations available

Personalised recommendations