Table 5.

Comparative anatomical measurements of investigated Salvia species (μ).

	S. absconditiflora	S. ceratophylla	S. multicaulis	S. verbenaca	S. viridis	S. syriaca
Stem
Cortex layers	3–4	2–4	2–4	2–4	3–7	3–5
Collenchyma layers	6–8	4–8	6–8	2–10	4–7	4–6
Phloem layers	3–5	3–5	3–5	2–5	2–5	4–9
Xylem layers	5–10	3–10	3–10	3–11	6–14	8–17
Root
Periderm layers	2–5	3–4	2–4	2–4	3–5	2–5
Periderma thickness (μm)	9–18	6–20	10–28	6–13	7–16	9–21
Cortex layers	6–15	10–14	12–18	10–17	12–20	4–9
Sclerenchyma layer	3–5	3–5	3–5	4–8	2–3	3–6
Pith region	10–17	9–15	10–18	8–15	1–3	11–17
Petiole
Petiole shape	Triangular	D-shaped	Triangular	U-shaped with obtuse margins	U-shaped	D-shaped
Collenchyma cell layers	2–4	3–7	4–7	3–7	3–6	3–7
Sclerenchyma layer	4–8	5–12	1–3	3–5	2–3	4–10