18. Oats thrive in northern regions where most of the other grains do not flourish. This grain forms one of the chief foods of the Scotch, Icelanders, and Scandinavians. Where other grains are used more largely as human food, it is especially valued as a fodder for horses.

Fig. 19. Map showing, as in Fig. 16, native home and present range of oats.

Fig. 19.-Map showing, as in Fig. 16, native home and present range of oats. (Original.)

19. Barley, in spite of its more southerly origin, grows even farther to the north than oats, and thrives equally in subtropical regions. Although anciently of great importance as a breadstuff, it is now used chiefly for malting (see section 29) and as fodder for domestic animals.

Fig. 17. Map showing, as in Fig. 16, native home and present range of barley.

Fig. 17.-Map showing, as in Fig. 16, native home and present range of barley. (Original.)

Fig. 10. Common barley (Hordeum sativum, var. vulgare, Grass Family, Gramineoe).

Fig. 10.-Common barley (Hordeum sativum, var. vulgare, Grass Family, Gramineoe). Plant, flower-cluster, spikelet, flower, and fruit. (Baillon.)

Fig. 11. Two rowed barley (H. sativum, var. distichori).

Fig. 11.-Two-rowed barley (H. sativum, var. distichori). Flower-cluster and base of a spikelet, slightly reduced. (Hackel.)

Fig. 12. Six rowed barley (H. sativum, var. hexastichon).

Fig. 12.-Six-rowed barley (H. sativum, var. hexastichon). B3, a group of three spikelets, as they appear together at a joint of the rachis. B, Bl, single spikelets. E, a flower (one stigma partly removed). Kl, K2, back and front views of kernel. All more or less enlarged. (Nees.)

20. Rye will grow in a poorer soil than any other grain. This fact accounts for its importance in regions that are hilly or otherwise difficult of tillage. From it is made a dark-colored bread, largely used by the peasantry of Austria, Germany, and Russia. In Sweden rye is highly valued as a breadstuff by all classes.

Fig. 18. Map showing, as in Fig. 16, native home and present range of rye.

Fig. 18.-Map showing, as in Fig. 16, native home and present range of rye. (Original.)

Fig. 7. Rye (Secale cereale, Grass Family, Gramineoe).

Fig. 7.-Rye (Secale cereale, Grass Family, Gramineoe). A plant, a flower-cluster, two spikelets with bracts spread apart, a flower, and a kernel. (Baillon.)