CLASSIFICATION OF DICOTYLEDONS. 215 



The Borage family (Borraginece) includes the forget-me-not 

 (Myosotis) and a few pretty wild flowers, e.g. the orange-flow- 

 ered puccoons (Lithospernum) ; but it also embraces a number 

 of the most troublesome weeds, among which are the houndV 

 tongue (Cynoglossum) (Fig. 119, A), and the " beggar' s-ticks " 

 (Echinospernum), whose prickly fruits (Fig. 119, C) become 

 detached on the slightest provocation, and adhere to whatever 

 they touch with great tenacity. The flowers in this family 

 are arranged in one-sided inflorescences which are coiled up at 

 first and straighten as the flowers expand. 



The last family (Solanece) includes the nightshades (Sola- 

 num) (Fig. 119, J9), to which genus the potato ($. tuberosum) 

 and the egg-plant (S. Melongena) also belong. Many of the 

 family contain a poisonous principle, e.g. the deadly night- 

 shade (Atropa), tobacco (Nicotiana) , stramonium (Datura), 

 and others. Of the cultivated plants, besides those already 

 mentioned, the tomato (Lycopersicum) , and various species of 

 Petunia (Fig. 119, JET), Solanum, and Datura are the commonest. 



The second order of the Anisocarpce consists of plants whose 

 flowers usually exhibit very marked, bilateral symmetry 

 (Zygomorphism) . From the flower often being two-lipped 

 (see Fig. 120), the name of the order (Labiatijtorce) is derived. 



Of the nine families constituting the order, all but one are 

 represented within our limits, but the great majority belong 

 to two families, the mints (Labiatce) and the figworts (Scroph- 

 ularinece). The mints are very common and easily recogniz- 

 able on account of their square stems, opposite leaves, strongly 

 bilabiate flowers, and the ovary splitting into four seed-like 

 fruits (Fig. 120, D, F). 



The great majority of them, too, have the surface covered with glandu- 

 lar hairs secreting a strong- scented volatile oil, giving the peculiar odor 

 to these plants. The dead nettle (Lamium) (Fig. 120, A) is a thoroughly 

 typical example. The sage, mints, catnip, thyme, lavender, etc., will 

 recall the peculiarities of the family. 



