Third class. 
3 
12. Spikelets in fascicles (about 10 in number) arranged in 
an interrupted spike. Only Italian Switzerland. 
Oplismenus. 614. 
— Spikelets 3 (2—5) together. 13 
— Spikelets almost always solitary .... 13 
13. Spikelets applied against lateral cavities of the rachis 14 
— Spikelets not in the cavities of the rachis. Only Tess. 
Heteropogon. 612. 
14. Spikelets with only 1 fl.Hordeum. 664. 
— Spikelets with 2 fls*) . . . . Elymus. 663. 
15 (12). Lower glumella with a dorsal awn Gaudinia. 659. 
— Lower glumella awnless or with a terminal awn 16 
16. Glumes 0. Style (or stig.) 1 . . Nardus. 666. 
— Glumes 1—2. Stigs. 2 ..... 17 
17. Lateral spikelets with only 1 glume, the narrow side 
against the rachis.Loliurn. 665. 
— Spikelets with 2 glumes, the broad side to the rachis 18 
18. Spikelets entirely sessile . . . . . 19 
— Spikelets very shortly (but distinctly) pedicelled . 20 a 
19. Glumes linear-acicular; spikelets with 2 fls and a third 
suppressed (or occasionally developed) . Secale. 662. 
— Glumes oval, lanceolate or lanceolate-linear. Spikelets with 
3—several fls . . . . . . . 20 
20. Spikelets more or less swollen. Glumes oval or oblong 
Triticum. 661. 
— Spikelets not swollen. Glumes lanceolate or linear-oblong 
Agropyrum. 660. 
20a (18). Spikelets with 1 fl. Dwarf-grass. . Mibora. 624 bis 
— Spikelets with 3—several fls ... . 21 
21. Glumes with 3—7 nerves. Ovary hairy at the top. 
Brachypodium. 657. 
— Glumes with 1—3 nerves. Ovary glabrous Nardurus. 658. 
22 (11). Spikelets solitary, awnless . . Cynodon. 625. 
— Spikelets in pairs ....... 23 
23. The sessile spikelet hermaphrodite, awued; the pedicelled 
spikelet male, awnless. . . . Andropcgon. 610. 
— Both spikelets hermaphrodite and awnless Digitaria. 615. 
24 (10). Panicle contracted (also during the flowering period) 
into a more or less dense spike .... 25 
— Panicle loose, sometimes racemose, but, at any rate during 
the anthesis, spreading . . . . . . 42 
25. Spikelets 1-fld . . . ... . 26 
— Spikelets with 2—several fls . . . . . 34 
*) In the species belonging to this country the spikelets have often only 
1 fl., with a second rudimentary fl. ; they may be easily distinguished from all 
species of Hordeum by the spathes being rough with retrorse hairs. 
