Question

(Plant Science)

Provide the genus and species for the following descriptions: Genus and species:_________________________

• Cool season perennial

• Bunchgrass (short rhizomes)

• Coarse, tough roots

• Ribbed leaves (serrated edges)

• Auricles blunt with fine hairs

• Short membranous ligule

• Seedhead = branched panicle with elliptical spikelets

• Seeds have a short awn

Genus and species:_________________________

• Cool season perennial
• Sod-forming (deep-rooted rhizomes)
• Blades narrow
• No auricles
• Ligule – membranous, truncate to rounded
• Round sheath
• Seedhead - Open panicle; 5 to 11 florets per spikelet

Genus and species:_________________________

• Cool season perennial
• Good for erosion prevention
• Quick to establish
• Undersurface of leaves is shiny dark green
• leaves are folded
• Inflorescence stems are nearly naked
• Seedhead - spikes with spikelets growing edgewise to seedhead stem; No awns

Genus and species:_________________________

• Cool season perennial
• Hairy leaves and stems
• Erect – grows 2-3 feet tall
• Large leaves, prominent v-shaped water mark
• Flower - pinkish-violet in dense clusters

Genus and species:_________________________

• Warm season perennial
• Good for erosion control (sod-forming)
• May become invasive
• Spreads by rhizomes, stolons and seed
• Stems are short-jointed
• Leaves are flat and spreading
• Leaves may be hairy or smooth
• Seedhead = two rows of spikelets on finger-like spikes
• White collar region with sparse, relatively long hairs

Answer 1

1.Cool-season perennial

Example: Lolium perenne, common name perennial ryegrass

Genus :Lolium

species: L. perenne

2. Bunchgrass (short rhizomes)

Answer: little bluestem (Schizachyrium scoparium)

3.Coarse, tough roots

Paspalum azuayense

Genus: Paspalum

Species: P.azuayense

4. Ribbed leaves (serrated edges)

Lolium perenne

Genus :Lolium

species: L. perenne

5.Short membranous ligule

Poaceae and Cyperaceae

Kentucky bluegrass, Poa pratensis)

(Johnson grass, Sorghum halepense)

6. Seedhead = branched panicle with elliptical spikelets

Spathiphyllum floribundum

7. Seeds have a short awn

• barley (Hordeum vulgare)

• barnyard grass (Echinochloa crus-galli)

• beach grass (genus Ammophila)