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Week 9. Plant Group #3 - Large Deciduous Shrubs Plant Group #4 - Deciduous Vines. Cotoneaster divaricatus – Spreading Cotoneaster. Location: Southwest corner of Horticulture Hall Small glossy leaves (1/2” long) Appressed hairs on twigs Red pomes in the fall

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Week 9

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week 9

Week 9

Plant Group #3 - Large Deciduous Shrubs

Plant Group #4 - Deciduous Vines

cotoneaster divaricatus spreading cotoneaster
Cotoneaster divaricatus – Spreading Cotoneaster

Location: Southwest corner of Horticulture Hall

Small glossy leaves (1/2” long)

Appressed hairs on twigs

Red pomes in the fall

Orange/red fall color late in season

Arching branches are a desirable habit…do not shear!

cotoneaster lucidus hedge cotoneaster
Cotoneaster lucidus – Hedge Cotoneaster

Location: East side of Pearson Hall

Leaves are larger than those of C. divaricatus

Pubescence on twigs

Dark blue pomes in the fall (but often doesn’t produce many for us)

Can have good fall color, but often disappoints

Used mainly for hedging, not very ornamental

Disease pressure on leaves causes defoliation

hamamelis virginiana common witchhazel
Hamamelis virginiana – Common Witchhazel

Location: North side of Food Science

Leaves have coarse dentations, and often have an oblique base

Flowers in fall, color is yellow/orange

The very fragrant flowers can be very attractive if leaves drop in time

Fruit capsules open in the fall and release seeds

Very good yellow fall color


hamamelis vernalis vernal witchhazel
Hamamelis vernalis – Vernal Witchhazel

Location: West side of Hamilton Hall and east side of East Hall

Similar to H. virginiana, but flowers in the winter (February to April)

Leaves are slightly more narrow than those of H. virginiana

Often has good golden fall color

Obvious flower buds in the fall (now)

The genus is underused in the landscape

Amazing fall color one year at Vet. Med. College


heptacodium miconioides seven son flower
Heptacodium miconioides – Seven-son Flower

Location: Horticulture Courtyard

Large, shiny, opposite leaves with prominent veins

Leaves are entire with wavy margins

White flowers in early fall followed by capsules with pink sepals

Brown, exfoliating twigs and bark

A promising new introduction with multi-season appeal

May reach 20’ high and 10-15’ wide

lonicera maackii amur honeysuckle
Lonicera maackii – Amur Honeysuckle

Location: Southwest corner of Landscape Architecture

Opposite leaves have an acuminate tip and are glossier

and larger than those of L. tatarica

Hollow pith near internodes

White spring flowers are ornamental

Red fruits (berries) in groups of up to four

A problematic invasive plant that should be removed

lonicera tatarica tatarian honeysuckle
Lonicera tatarica – Tatarian Honeysuckle

Location: Southeast of Horticulture Hall greenhouses under pekin lilac

Leaves – smaller, less glossy than those on L. maackii.

- Leaf bases are rounded, and leaves do not have an acuminate tip

Thin, peeling twigs, brown pith, appressed buds

Has creamy white spring flowers

Can have yellow, orange, red fruits

Witches brooms are common (aphids)

Very invasive introduction… remove it!

prunus tomentosa nanking cherry
Prunus tomentosa – Nanking Cherry

Location: West of Hixon-Lied Success Center

Leaves are serrated with deeply embedded veins

Glands and pubescence on petioles

May have stipules at the base of petiole, buds are clustered

Single season appeal…white flowers in spring

Red, edible drupes in summer

Benefits from renewal pruning

viburnum sieboldii siebold viburnum
Viburnum sieboldii – Siebold Viburnum

Location: Southwest corner of Memorial Union

Large, coarse leaves are lustrous dark green

Crushed leaves smell like rotten green peppers!

Flat-topped inflorescences of creamy white flowers in May

Bullet shaped, valvate buds are pubescent

Size is 15 – 20’ high and

10-15’ wide

viburnum trilobum cranberrybush viburnum
Viburnum trilobum – Cranberrybush Viburnum

Location: East side of Lagomarcino Hall next to bell

Leaves are three-lobed

Large flat-topped inflorescences (white)

Very abundant red fruits in fall

Can have spectacular fall color

All-around great viburnum with

many cultivar choices

viburnum rufidulum rusty blackhaw viburnum
Viburnum rufidulum – Rusty Blackhaw Viburnum

Location: West side of Lake LaVerne along sidewalk through the trees

Very similar to V. prunifolium, but has pubescence on petioles, and rusty red/brown buds in the winter

Very nice glossy leaves are oval w/serrations

Green fruits turn pink to blue in fall

Can have deep red fall color

campsis radicans trumpetcreeper
Campsis radicans – Trumpetcreeper

Location: Not on campus…See sample in jar

Pinnately compound leaves are opposite

Red/orange flowers

Pod-like capsule with papery seeds


clematis terniflora sweetautumn clematis
Clematis terniflora – Sweetautumn Clematis

Location: Horticulture Courtyard – Trellis

Opposite, pinnately compound leaves

White panicles of fragrant flowers in fall

Note persistent styles with silky pubescence on fruits (achenes)

Climbs by twining its stems around supportive structures

Easy to grow, vigorous…almost weedy in some cases

hedera helix english ivy
Hedera helix – English Ivy

Location: Climbing wall on north side of MacKay Hall

Physiologically mature leaves are unlobed and juvenile leaves are 3-lobed

Leaves are evergreen

Berry-like fruits turn bluish to black

An aggressive climber attaching with aerial roots

Not fully hardy here, but is invasive elsewhere

Proper placement is important

- North facing wall

hydrangea anomala ssp petiolaris climbing hydrangea
Hydrangea anomala ssp. petiolaris – Climbing Hydrangea

Location: Small plants on the northeast wall of Student Success Center

Opposite leaves are round

Brown stems are exfoliated, attach to structures with holdfasts

White, flat-topped flower clusters in June/July are very showy

Extremely aggressive climber – can climb an 80’ tree!

No good examples on campus…yet

parthenocissus quinquefolia virginia creeper
Parthenocissus quinquefolia – Virginia Creeper

Location: Climbing on many buildings on campus

5-leaflets (quinque-), palmately compound

Blue berries and purple/red fall color

Holdfasts on tendrils can be damaging to wood

Maintain to keep growth under control

parthenocissus tricuspidata boston ivy
Parthenocissus tricuspidata – Boston Ivy

Location: Climbing many buildings on campus

Three-lobed leaf

Blue fruits (berries) and red fall leaf color

Holdfasts, tendrils, and aerial roots

Also damaging to wood

Native to China

wisteria floribunda japanese wisteria
Wisteria floribunda – Japanese Wisteria

Location: Horticulture Courtyard

Pinnately compound leaves are alternate

Buds are pubescent and may have spines at leaf nodes

Vigorous grower, but often will not flower in Iowa

Needs a very sturdy support!