Quiz 3 Flashcards
Prunus
Cherry, Mayday, etc
Prunus virginiana
Chokecherry- seldom planted as ornamental
Prunus virginiana ‘Schubert’
Schubert chokecherry
Schubert chokecherry- general
small tree/large shrub depending on how it is pruned
leaves emerge green then turn purple in early summer
Schubert chokecherry bud
Alternate bud formation
multiple overlapping scales
large buds
acuminate tip
numerous white lenticels
reddish-brown stems
Schubert chokecherry- leaves
obovate leaf (wider in the top half) to broadly elliptical
acute to apiculate leaf tip
acute to rounded leaf base
finely serrate leaf margin
big variation in leaf shape, tip, base
may have glandular petioles
Schubert chokecherry- flowers
8-15 cm raceme with many white flowers; individual flowers smaller than Mayday
Schubert chokecherry- fruit
fruit dark red/purple drupe
hard stone inside
Prunus virginiana ‘xanthocarpa’
yellow fruit chokecherry
Chokecherry bark
twigs reddish-brown
turning smooth gray, turning brown with age
Contarinia virginianae
Chokecherry gall midge
Chokecherry- autumn colour
autumn colouration yellow to red
Schubert chokecherry- autumn colour
red; chokecherry can be yellow
Prunus virginiana - cultivars
‘mini’; ‘midi’; ‘copper’; ‘midnight’
Apiosporina morbosa
Black knot of cherry
Prunus padus var. commutata
Mayday tree
Mayday tree- general
1 trunk from ground breaking into boughs shortly above ground
trunks are much wider than chokecherry
tendency to sucker/offshoot close to trunk
Mayday tree- leaves
elliptic to obovate or oblong-ovate
rounded to acute/sub-cordate base
finely serrate
petioles most commonly glandular
Mayday tree- flowers
flowers larger; more showy; very fragrant
Mayday tree- fruit
smaller than chokecherry
often fewer in number
stone is often striated unlike chokecherry
mostly bitter
Mayday tree- bark
can be single trunk or multi-trunked
trunks often gray-brown
Prunus maackii
Amur cherry
Amur chokecherry
Amur cherry- general
mainly grown for peeling bronze bark/outstanding winter colouration
new cultivars on market with outstanding ornamental value and/or unique shape (columnar)
round topped
med-high headed
ascending branches
medium sized tree
single trunked or multi-trunked
new growth is often quite tomentose (hairy)
long thin stipules present
Amur cherry- buds
alternate
ovoid
multiple overlapping scales
acute-acuminate tip
Amur cherry-leaves
elliptic to oblong-ovate
acuminate tip
rounded base
fine serration
Amur cherry- flowers
pendulous raceme
showy in mass
Amur cherry- fruit
Like chokecherry but inedible
much smaller than chokecherry
often shiny, matures august; stains badly
Amur cherry- bark
New bark golden to orange bronze
older bark dark bronze
with age bark can be quite blackened
large lenticels
peeling
Amur cherry- problems
Offshoots from base of tree are common
sunscald often a problem
Bolting will help protect trunks from splitting
weak crotches due to ascending branch habit
Prunus pensylvanica
Pincherry
Pincherry- general
upright small tree/large shrub
multi-stemmed
suckering
native plant
Pincherry- leaves
alternate
lanceolate- oblanceolate
acuminate tip
rounded base
serrate
leaves commonly droop
Pincherry- growth
new growth commonly red/bronze
older growth quite bronzy- not peeling; conspicuous lenticels; shiny
Pincherry- flower
umbel unlike panicle in chokecherry
Pincherry- fruit
like a sweet cherry
sour
excellent for jelly
bright scarlet
Rosa
Rose
