Week 9

1. Week 9 Plant Group #3 - Large Deciduous Shrubs Plant Group #4 - Deciduous Vines

2. 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!

3. 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

4. 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 Fruits

5. Hamamelis virginiana – Common Witchhazel

6. 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 Buds

7. 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

8. 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

9. 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!

10. 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

11. 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

12. 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

13. 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

14. Vines

15. 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 Native

16. 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

17. 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

18. 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

19. 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

20. 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

21. 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!