Ulmus-elm

Question 1

Ulmus

Answer 1

Elm

Question 2

Ulmus americana

Answer 2

American Elm

Question 3

American Elm- Characteristics

Answer 3

25% of urban forest
Typical ‘Y’ shape; many bough originate from single trunk
also called white elm
ascending branches
high headed, circular shape
good for landscape

Question 4

American elm- stem

Answer 4

alternate buds
petiole leaf attachments

Question 5

American elm- leaf

Answer 5

most often oblique leaf bases
acuminate leaf tip
ovate-oblong shape
rough hairy above
doubly serrated leaves

Question 6

American elm autumn

Answer 6

colouration yellow to gold
make good arches at maturity

Question 7

Ulmus pumila

Answer 7

Manchurian/Siberian Elm
less susceptible to dutch elm disease

Question 8

Siberian elm-buds

Answer 8

Rounded globular buds (distinct feature)
very distinctive round reddish buds in late autumn/early spring
alternate buds

Question 9

Siberian elm- leaf

Answer 9

elliptic to elliptical- lanceolate leaves
smaller leaves than american elm
serrate
obtuse base ‘almost symmetrical’

Question 10

Siberian elm- characteristics

Answer 10

needs the lack of competition to get its full form
shelterbelt trees
fill in gaps- good for stand alone

Question 11

Elm flowers

Answer 11

Monoecious
wind pollinated

Question 12

Elm seeds

Answer 12

Winged samara, dispersed by wind and flowing water
can move through channels of water

Question 13

Elm characteristics

Answer 13

commonly used as hedge material; requires frequent shearing as growth can be rapid and extensive
narrow/weak crotches tend to break down during heavy snow