Hort 28 McConnell Arboretum and Gardens

1. Hort 28 McConnell Arboretum and Gardens

2. Perovskiaatriplicifolia, Russian sage

3. Perovskia atriplicifolia, Russian sage Native to w. and central Asia ID: woody-based clump 4 ft x 4 ft with many upright stems; lvs gray-green, opposite, aromatic, lower are deeply cut, upper merely toothed; flrs in sprays, make a purple haze Value: long-lasting haze of purple bloom (June to frost), heat and drought tolerant, sun tolerant Care: trim spent blossoms to extend bloom; little water; can be invasive in some areas

4. Solanumlaxum, potato vinenightshade family--Solanaceae Vine for fence, trellis At edge of its hardiness in Redding—may be killed in cold winter Poisonous foliage (all nightshades) and fruits (some nightshades)

5. Solanumlaxum, potato vinenightshade family--Solanaceae

6. Rosa chinensis‘Mutabilis’China roserose family--Rosaceae

7. Rosa chinensis‘Mutabilis’ 4-ft shrub, may climb if supported Flowers single, change color, borne all summer ‘til frost Good low-care rose for mixed shrub border

8. Roses have alternate, pinnately compound leaves WiTH STIPULES Nodal spines, internodal prickles Rosa ‘Sally Holmes’ Single ‘wild-type’ roses have 5 petals, 5 sepals, numerous stamens surrounding a cluster of simple pistils; fruit is a rose hip

9. x Chitalpatashkentensis‘Pink Dawn’catalpa family--Bignoniaceae

10. x Chitalpatashkentensis ‘Pink Dawn’ Intergeneric hybrid between Chilopsis (desert willow) and Catalpa; combines drought tolerance with large flowers ID: Decidous tree 20-30 x 20-30ft; leaves long and narrow; flowers tubular, in clusters Value: drought tolerant, flowers, shade Problems: messy Care: Do not overwater

11. Vitexagnus-castus, Chaste treemint family--Lamiaceae

12. Vitex agnus-castus, Chaste tree • Native to Europe • Name means “chaste lamb”; vitex refers to plaiting, as in fences • ID: arborescent shrub to 25 ft; shrubby perennial where colder; clusters of purple flowers; lvs aromatic, gray-green, palmately compound • Value: flowers all season, nice leaves, handle as a shrub or small tree, can be underplanted; takes moderate wate, resists oak root fungus • Care: moderate water; prune as desired (blooms on new growth)

13. Spiraeadouglasii, Douglas spiraea,rose family--Rosaceae Native to PNW (N. Cal to BC) ID: deciduous shrub to 6 ft x 20 ft; tall narrow pink flower clusters; lvs narrow, to 3.5 in., green above and velvety white beneath Value: takes swampy conditions, wild plantings near streams; has pink flrs; Native Americans used for arrow shafts, digging sticks Care: Likes moisture, acid soil; can be invasive in moist situation

14. Spiraeadouglasii, Douglas spiraea,rose family--Rosaceae

15. Amorphacalifornica, California false indigopea family--Fabaceae • Shrubs, 6-8 ft • Purple flower stalks with orange stamens • Tiny erect pea pods • Pinnately compound leaves

16. California false indigo, Amorphacalifornica • Food plant for California dogface butterfly (state butterfly)

17. Calycanthusoccidentalis, western spicebushSpicebush family--Calycanthaceae George Hartwell

18. Calycanthus occidentalis, Western spicebush Deciduous shrub, can become large and rangy; prune to control size, but will sacrifice one year’s flowers Spicy odor; some smell fishy, purchase or propagate when in bloom to be sure Grows in foothills around Shasta Lake, Whiskeytown Lake

19. Calycanthus occidentalis, Western spicebush Native to California and north, growing along streambanks or moist hillsides ID: deciduous shrub, 10 x 10 ft; ovate, entire, aromatic leaves; magnolia-like maroon flowers Value: good in shade, nice flowers, nice winter fruits, yellow fall color Care: moderate water; blooms on current season’s growth; remove crowded stems annually Warning: Seeds can cause convulsions

20. Woodwardia fimbriata, giant chain fern

21. Woodwardia fimbriata, giant chain fern Native to California, along streams ID: deciduous fern to 5 ft (can be 9 ft!); leaves pinnately divided (how many times??); no flowers (ferns reproduce by spores Value: gorgeous green fern, not invasive Care: partial to full shade; needs water; use near pond, a shaded wall, even shaded seep in desert

22. Fern Life Cycle

23. Verbena bonariensis, tall verbenaVerbena family--Verbenaceae • Opposite leaves narrow & scratchy • Tall, ‘see through’ • Prolific seeder

24. Verbena bonariensis, tall verbena

25. Verbena bonariensis, tall verbena Native to South America; naturalized in parts of California… ID: wispy shrub, 6 x 3 ft, airy branching stems; flrs tubular, purple, in dense clusters; lvs mostly basal Value: drought and heat tolerant; airy quality, purple flrs Care: little water, deadhead for rebloom; self sows freely…

26. Vitiscalifornica, California wild grape • Riparian forest is relict of 20 million years ago • Trees winter deciduous • Makes good farmland, so 90%+ now converted for agriculture • Wild grape, Vitiscalifornica, along stream corridors below 4000 ft. elev. is an indicator of this habitat • ‘Roger’s Red’ is a hort form

27. Vitiscalifornica, California wild grape

28. Buddleia x weyeriana‘Honeycomb’, Honeycomb butterfly bushScrophulariaceae

29. Buddleia x weyeriana‘Honeycomb’, Honeycomb butterfly bush • Large, semi-evergreen shrub that attracts butterflies • Takes moderate water, sun • Prune after bloom, by cutting out the oldest stems at the base of the plant • This is one of the better butterfly bushes, that fills a gap in bloom, is fragrant, and is long lasting without too much deadheading

30. Buddleia davidii, butterfly bushScrophulariaceae

31. Buddleia davidii, butterfly bushScrophulariaceae

32. Rhus lancea, African sumac, Anacardiaceae—Cashew family

33. Rhuslancea, African sumac, Anacardiaceae—Cashew family From South Africa, called “Karee” Extremely drought-tolerant tree or large shrub Dioecious--sexes separate, pollen allergenic Requires some fussing to look its best (suckers) Fruit is edible and has been used to make beer

34. Abelia x grandiflora, Glossy abelia, Caprifoliaceae; honeysuckle family Cross between two Chinese species Grows 8 x 5 ft. Evergreen or semi-evergreen: loses leaves at 15 F., freezes to ground at 0 F (but does not die); fruit clusters interesting, flrs. white and fragrant, bloom summer and fall Leaves opposite!!

35. Platanusracemosa, California sycamore leaf lobes entire, very hairy underneath; fruits spherical, zigzag on stalk

36. Platanusracemosa, California sycamore

37. Artemisia ‘Powis Castle’sunflower family--Asteraceae

38. Artemisia ‘Powis Castle’sunflower family--Asteraceae

39. Philadelphuslewisii, wild mock orangehydrangea family--Hydrangeaceae

40. Philadelphuslewisii, wild mock orange • Arching branches • Opposite leaves with widely spaced teeth, 3-veined from the base • 4-petaled fragrant flowers • Blooms on last year’s wood

41. Clerodendrumbungei, Cashmere Bouquetmint family--Lamiaceae

42. Clerodendrumbungei, Cashmere Bouquetmint family--Lamiaceae • Tropical look • Needs regular water, shade • Large opposite leaves with distinctive odor

43. Erigeron karvinskianus, Santa Barbara daisysunflower family--Asteraceae • Pink and white daisies with yellow centers • Drought tolerant, full sun • Mounded form

44. Erigeron karvinskianus, Santa Barbara daisy

45. Ulmusglabra ‘Camperdownii’, Camperdown elmelm family--Ulmaceae

46. Ulmusglabra ‘Camperdownii’, Camperdown elm Large trees, weeping Leaves double-toothed, edges not meeting at base (oblique or asymmetric base); very rough to touch Branches will touch ground

47. Hydrangea macrophyllaBigleaf Hydrangea

48. Hydrangea macrophyllaBigleaf Hydrangea • Opposite leaves • 6 inches long • Simple leaves

49. Hydrangea macrophyllaBigleaf Hydrangea • Inflorescence is a corymb • Bloom color affected by soil pH. • Acidic soil (pH below 6) flowers are blue • Alaline soil (pH above 6) flowers are pick