Classifitation of Plants 



351 



cognized by the four nuts in the persistent calyx, the square 

 stem, opposite and decussate, ex-stipulate leaves, and strong 

 odour, due to oil secreted in hairs on the stem and leaves. 

 The main stem continues growing, but the branches are tipped 

 by a flower. 



Fig. 333. — Leonotis L^onoi-u^, R. Br. 

 ' Elementary Botany for South Alrica ". ) 



(I-Vom Edmonds and Marloth's 



There are 8 Eastern genera in which the filaments bend to the lo\yer 

 side of the flo\\'er. In the genera in which the lower lip serves for a 

 landing-place for bees, which are their most frequent visitors, the fila- 

 ments arch to\\'ard the upper petals. The upper lip shelters the essential 

 organs. 



In Mentha (the !Mints) the corolla is nearly regular, and 

 the four stamens spread equally around the flower. 



Salvia. — Corolla large, the upper lip sheltering the stamens 

 and stigma. Stamens 2, T-shaped, with short filaments and 

 a long connective hinged to the filament near the centre. In 

 South African Salvias, the half anther on the lower end of the 

 connective bears no pollen (see p. 163). 



