Invasive species Exam 2

Question 1

Cheatgrass SN

Answer 1

Bromus tectorum

Question 2

Medusahead SN

Answer 2

Taeniatherum caput-medusae

Question 3

Poison Hemlock SN

Answer 3

Conium maculatum

Question 4

Halogeton SN

Answer 4

Halogeton glomeratus

Question 5

Spotted Knapweed SN

Answer 5

Centaurea stoebe

Question 6

Western Juniper SN

Answer 6

Juniperus occidentalis

Question 7

Leafy Spurge SN

Answer 7

Euphorbia esula

Question 8

Whitetop SN

Answer 8

Cardaria draba

Question 9

Cheatgrass ID

Answer 9

-panicle seedhead, slender nodding branches, 3-8 florets often purple, stiff awns

Question 10

Medusahead ID

Answer 10

• spikelets have 2 florets with long awns

crown of bristles and spiked inflorescence

Question 11

Poison Hemlock ID

Answer 11

• tall herbaceous, leaves are highly divided, purple to red blotches on the mature stem and compound umbel, white flowers

Question 12

Halogeton ID

Answer 12

several branches arise from the center of plant

stems curve outward, low growing. stems often turn red, tissue-like fruits, short hooked bristle on the ends of leaves

Question 13

Spotted Knapweed ID

Answer 13

herbaceous, 1-4 ft tall, showy pink to purple composite flower with spotted bracts

Question 14

Western Juniper ID

Answer 14

small evergreen tree with blue berries.

Question 15

Leafy Spurge ID

Answer 15

• yellow bracts, simple panicle inflorecence, narrow leaves and strongly rhizomataus

Question 16

Whitetop ID

Answer 16

• herbaceous stems with little branching, grayish green leaves, arrowshaped, white flat topped flowers. aggressive rhiozmes

Question 17

Which species are ANNUAL (3)

Answer 17

• Cheatgrass
• Medusahead
• Halogeton

Question 18

Which species are PERINNEAL

Answer 18

• Poison Hemlock
• spotted knapweed
• Western Juniper
• leafy spurge
• whitetop

Question 19

What is the one species that is native?

Answer 19

western juniper