Transcript Plant List 3: (Chaste Tree List) McConnell Arboretum and Gardens

Hort 28
McConnell
Arboretum and
Gardens
Perovskia atriplicifolia,
Russian sage
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
Solanum laxum, potato vine
nightshade 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)
Solanum laxum, potato vine
nightshade family--Solanaceae
Rosa chinensis ‘Mutabilis’
China rose
rose family--Rosaceae
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
Rosa ‘Sally Holmes’
Roses have alternate, pinnately
compound leaves WiTH
STIPULES
Nodal spines, internodal prickles
Single ‘wild-type’ roses have 5
petals, 5 sepals, numerous
stamens surrounding a cluster of
simple pistils; fruit is a rose hip
x Chitalpa tashkentensis ‘Pink Dawn’
catalpa family--Bignoniaceae
x Chitalpa tashkentensis ‘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
Vitex agnus-castus, Chaste tree
mint family--Lamiaceae
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)
Spiraea douglasii, 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
Spiraea douglasii, Douglas spiraea,
rose family--Rosaceae
Amorpha californica, California false
indigo
pea family--Fabaceae
• Shrubs, 6-8 ft
• Purple flower stalks
with orange stamens
• Tiny erect pea pods
• Pinnately compound
leaves
California false indigo, Amorpha
californica
• Food plant for California dogface
butterfly (state butterfly)
Calycanthus occidentalis, western
spicebush
Spicebush family--Calycanthaceae
George Hartwell
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
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
Woodwardia fimbriata, giant
chain fern
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
Fern Life Cycle
Verbena bonariensis, tall verbena
Verbena family--Verbenaceae
• Opposite leaves narrow &
scratchy
• Tall, ‘see through’
• Prolific seeder
Verbena bonariensis,
tall verbena
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…
Vitis californica,
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, Vitis
californica, along stream
corridors below 4000 ft.
elev. is an indicator of
this habitat
• ‘Roger’s Red’ is a hort
form
Vitis californica, California wild grape
Buddleia x weyeriana ‘Honeycomb’,
Honeycomb butterfly bush
Scrophulariaceae
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
Buddleia davidii, butterfly bush
Scrophulariaceae
Buddleia davidii, butterfly bush
Scrophulariaceae
Rhus lancea, African sumac,
Anacardiaceae—Cashew family
Rhus lancea, 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
Abelia x grandiflora, Glossy abelia,
Caprifoliaceae; honeysuckle family
• Cross between two
Chinese species
• Grows 8 x 5 ft.
Evergreen or semievergreen: 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!!
Platanus racemosa, California sycamore
• leaf lobes entire,
• very hairy
underneath;
• fruits spherical,
zigzag on stalk
Platanus racemosa, California sycamore
Artemisia ‘Powis Castle’
sunflower family--Asteraceae
Artemisia ‘Powis Castle’
sunflower family--Asteraceae
Philadelphus lewisii, wild mock orange
hydrangea family--Hydrangeaceae
Philadelphus lewisii, 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
Clerodendrum bungei, Cashmere
Bouquet
mint family--Lamiaceae
Clerodendrum bungei, Cashmere
Bouquet
mint family--Lamiaceae
• Tropical look
• Needs regular
water, shade
• Large opposite
leaves with
distinctive odor
Erigeron karvinskianus, Santa Barbara
daisy
sunflower family--Asteraceae
• Pink and white
daisies with yellow
centers
• Drought tolerant,
full sun
• Mounded form
Erigeron karvinskianus,
Santa Barbara daisy
Ulmus glabra ‘Camperdownii’,
Camperdown elm
elm family--Ulmaceae
Ulmus glabra ‘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
Hydrangea macrophylla
Bigleaf Hydrangea
Hydrangea macrophylla
Bigleaf Hydrangea
• Opposite leaves
• 6 inches long
• Simple leaves
Hydrangea macrophylla
Bigleaf 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