Quiz #2,
1. Hordum vulgare. What distinguishes one of these heads from the other? The lateral pair of spikelets at each node are seed bearing.
2. Aegilops cylindrica. What distinguishes this genus? Spikelets embedded in the thick rachis renders a cylindrical spike.
3. Taeniatherum caputmedusa. What distinguishes this genus? Two spikelets per node and one floret per spikelet plus annual habit.
4. Secale cereale. What distinguishes this genus? The pectinate hairs lining the veins of the lemma.
5. Elymus junceus. What distinguishes this genus? Narrow sharp glumes and two spikelets per node plus perennial habit.
6. Agropyron trachycaulum. What distinguishes this species? Long oat-like glumes.
7. Elymus glaucus. What distinguishes this species? The broad leaves and relatively wide glumes (for an Elymus).
8. Elymus elymoides. What distinguishes this genus? Narrow sharp glumes and two spikelets per node plus perennial habit.
9. Agropyron trichophorum. What distinguishes this genus? Relatively broad glumes and one spikelet per node plus perennial habit.
10. Agropyron spicatum. What distinguishes this species? The internodes of the inflorescence rachis much longer than the glumes.
11. Agropyron dasystachyum. What distinguishes this species? Rhizomatous perennial with broad glumes (several veined).
12. Elymus cinereus. What distinguishes this species? Very large bunchgrass (about
13. Elymus canadensis. What distinguishes this genus? Narrow sharp glumes and two spikelets per node plus perennial habit.
14. Eremopyrum triticeum. What distinguishes this genus? Flowering head disperses as a burr (an annual with crested-like head).
15. Hordeum leporinum. What distinguishes this genus? Three spikelets per node and one floret per spikelet (laterals not seed bearing).