Gramineae. 
421 
2. Spike lax, drooping, indistinctly 4-cornered. Glumes 
very long, oblong-lanceolate, scarious, nerved throughout 
their whole length.—Rarely cultivated. 6 
f polonicum L. 2534. 
— Spike dense, distinctly 4-cornered. Glumes cartilagi¬ 
nous, nerved only in the upper portion . . 3 
3. Glumes oblong (3 times as long as broad), keeled, 
winged almost throughout their whole length. — Not 
common. 6.t aurum Desv. 2535. 
— Glumes broad-oval ...... 4: 
4. Stem hollow above. Glumes only keeled in the upper 
portion. Glumellas awned (T. sestivum L.) or almost 
awnless (F. hybernum L.). 6 . . f vulgare Vill. 2536. 
— Stem solid or scarcely hollow above. Glumes keeled- 
winged throughout their whole length. Glumellas gen. 
long-awned.—6 .... + turgidum L. 2537. 
5(1). Spike almost regularly 4-cornered, loose, finally 
drooping, the spikelets hardly covering each other a 
little, convex on both sides. Spelt. 6 f Spelta L. 2538. 
— Spike compressed on the sides of the axis from which 
no spikelets spring (as in the barley-spikes), erect; spike- 
lets covering one another, flat or concave on the inner 
side. 6 
6. Glumes oblong-oval, the keel terminated by a short 
mucron curved inwards. Spikelets with 2 grains and 
2 awns.—Rarely cultivated. 6 t dicoccum Schrank. 2539. 
— Glumes oblong-lanceolate, the keel terminated by a 
straight mucron. Spikelets with 1 grain and 1 awn.— 
Sometimes cultivated in the mountains. 6 
monococcum L. 2540. 
662. Secale. Rye. Ill, 19. 
1. The largest and earliest of our cereals (20—25 dm). 
—Cultivated everywhere. 5 . . f cereale L. 2541. 
663. Elymus. Lyme-grass. Ill, 14. 
1. Spikelets long-awned. L.-sheaths rough with hairs di¬ 
rected downwards.—Woods of the mount.; distrib., but 
not very common. 6 europaeus L. 2542. 
664. Hordeum. Barley. Ill, 14. 
1. All the spikelets sessile, hermaphrodite and awned. Cul¬ 
tivated species ....... 2 
— The middle spikelet hermaphr. and awned, the 2 lateral 
ones male and not awned. Cultivated species . 3 
— The middle spikelet hermaphr., the 2 lateral ones male, 
all 3 awned. Wild species ..... 4 
