The morphological, anatomical and ecological properties of endemic Onosma bracteosum Hausskn. & Bornm. (Boraginaceae) species

Ergen Akçin Ö., Engin A.

Turkish Journal of Botany, vol.29, no.4, pp.317-325, 2005 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 4
  • Publication Date: 2005
  • Journal Name: Turkish Journal of Botany
  • Journal Indexes: Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.317-325
  • Keywords: Anatomy, Boraginaceae, Ecology, Morphology, Onosma bracteosum
  • Ondokuz Mayıs University Affiliated: Yes


The endemic Onosma bracteosum Hausskn. & Bornm. (Boraginaceae) was investigated morphologically, anatomically and ecologically. It has setae with tuberculate bases. The stem is 15-35 cm tall and erect. The leaves are equifacial and amphistomatous. Stomata cells are anisocytic and anomocytic. The stomata index is 21.25 for the upper epidermis and 25 for the lower epidermis. This plant generally prefers sandy-loamy, sandy-clayey and loamy soils. In the soil samples, the N (23%). P (26%) and K (27%) concentrations were lower in the generative periods than in the vegetative periods. According to the results of plant nutrient anal ysis, N% (1.140-3.274), P% (0.172-0.403) and K% (0.512-1.281) concentrations are higher in the above-ground parts during the vegetative growth period. © Tübi̇tak.