|Description of Trichomes:
Glandular secreting trichomes (GST).
Three different types of capitate hairs were found in S. fruticosa. Type I, consisting of 1-2 stalk cells and 1-2 enlarged, rounded to pear-shaped secretory head cells; Type II, consisting of 1-2 stalk cells and one elongated head cell as narrow as the stalk cells at its base and slightly enlarged above; Type III, consisting of 2-5 elongated stalk cells and rounded head in young leaves, which will becomes cup-shaped in mature leaves.
1) Werker E, Ravid U, Putievsky E. 1985. Structure of glandular hairs and identification of the main components of their secreted material in some species of the Labiatae. Israel Journal of Botany 34: 31-45
2) Serrato-valenti G, Bisio A, Cornara L and Ciarallo G. (1997) Structural and Histochemical Investigation of the Glandular Trichomes of Salvia aurea L. Leaves, and Chemical Analysis of the Essential Oil. Annals of Botany 79: 329-336.