694 



BOTANY 



PART II 



Family 2. Boraginaeeae. Contains herbs usually covered with 

 coarse hairs. Sympliytum (Comfrey), Borago (Borage), Anchusa ( Alkanet), 

 Echium (Bugloss) (Fig. 750), Myosotis (Forget-me-not), are among the 

 commonest and .most conspicuous herbaceous plants of our flora ; all 

 have entire, alternate leaves, covered with harsh hairs and relatively 

 large flowers of a lighter or darker blue, grouped in complicated 

 inflorescences. Flowers actinomorphic or zygomorphic. Petals fre- 



FIG. 750. Echium vulgare. Inflorescence ( nat. size). 

 Single flower and fruit, composed of four nutlets (enlarged). 



FIG. 749. Borago officinalis. a, 

 Flower ; b and c, fruit (nat. size). 



FIG. 751. Floral diagrams of (A) Verbena officinalis (after 

 EICHLER), and (B) Lamium (Labiatae) (after NOLL). 



quently provided with scales standing in the throat of the corolla. 

 Ovary always bilocular but divided by false septa into four one-seeded 

 nutlets. The style springs from the midst of the four-lobed ovary. 



Family 3. Verbenaeeae. Clearly dorsiventral flowers, with only 

 four stamens; the ovary contains only four ovules (Fig. 751), but the 

 style is terminal. Tectona grandis, Teak-tree ; Avicennia ( 33 ) a vivipar- 

 ous mangrove plant. 



Family 4. Labiatae. Distributed over the earth. Herbs or 

 shrubs with quadrangular stems and decussate leaves without stipules. 

 Leaves simple ; plants often aromatic owing to the presence of glandular 



