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PLSC 330 > Cotoneaster > Flashcards

Cotoneaster Flashcards

1
Q

Cotoneaster

A

cotoneaster

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2
Q

Why so big a difference of how many species botanists list?

A

Hybridization and apomictic genus

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3
Q

Apomixes

A

Asexual propagation via seeds; genetically identical to itself

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4
Q

Varieties

A

often occur in nature and most varieties are true to type

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5
Q

Cultivars

A

not necessarily true to type, often vegetatively propagated

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6
Q

Cotoneaster lucidus/ C. acutifolius var. lucidus

A

Peking or hedge cotoneaster

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7
Q

Hedge cotoneaster

A

a very common hedge plant (sheared or unsheared)

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8
Q

Hedge cotoneaster- buds

A

buds very pubescent
alternate
new growth green to brownish and pubescent

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9
Q

Hedge cotoneaster- leaves

A

ovate to elliptic
short petiole
acute leaf tip
broadly acute at base
petiole pubescent
dark green and shiny above (top of leaf)
lighter green and wooly below (bottom of leaf)
alternate bud formation on new growth
older growth=spurs

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10
Q

Hedge cotoneaster- flowers

A

pinkish white, not very showy
3 to 8 flowered cyme

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11
Q

Hedge cotoneaster- fruit

A

small dark purple pome
not edible
birds spread plants around
spurs
calyx at bottom

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12
Q

Pome

A

fruit formed from an inferior ovary

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13
Q

Hedge cotoneaster- fall colour

A

fall colour bright red and a reason for their popularity brown hairy stem and buds; small stipules can be present

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14
Q

Hedge cotoneaster disease

A

fireblight

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15
Q

Fireblight

A

a major disease on hedge cotoneasters
Bacteria Erwinia amylovora causes the disease
affects over 130 plant species in the Rosaceae family worldwide

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16
Q

Cotoneaster integerrimus

A

European cotoneaster

17
Q

European cotoneaster

A

Sprawling thick, very branchy shrub
arching branches
left unpruned they will be taller than hedge cotoneaster
Way to ID: arching branches

18
Q

European cotoneaster- bud

A

stipules present but shed early; new growth and buds quite brown pubescent

19
Q

European cotoneaster- flowers

A

white
two to four flowered cymes
produced on short spurs

20
Q

European cotoneaster- fruit

A

fruit is pome
lots of fruit is common; not edible

21
Q

European cotoneaster- fall colour

A

orange- red/bronze/purplish autumn colouration

22
Q

European cotoneaster- leaf

A

broad-ovate or elliptic-ovate
obtuse/acute leaf tip
rounded at base
petioles often pubescent

23
Q

Cotoneaster adpressus

A

creeping cotoneaster

24
Q

Creeping cotoneaster

A

ground hugging shrub with shiny green leaves
very ornamental

PLSC 330 (21 decks)

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