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In Bloom

Bartlettina sordida Asteraceae
 

purple torch (Bartlettina sordida) by Mona Bourell

 

The shaded understory of the Mesoamerican Cloud Forest is brightened this month by the electric purple flower heads of Bartlettina sordida, commonly known as bartlettina or purple torch. This large tree daisy has been grown at the San Francisco Botanical Garden since 1988, originating from a seed collection made by Dr. Dennis Breedlove in Oaxaca, Mexico. Bartlettina sordida is a member of the daisy family Asteraceae, a large plant family that contains many familiar plants such as dandelions and sunflowers. While many of its close relatives measure only inches tall in height, B. sordida towers above them-and you-reaching heights of up to 8 to 10 feet. Most of the other tree daisies in the garden's collection bloom primarily in the fall. However, Bartlettina sordida's striking flower display is produced throughout the spring as well, making it a show stopping beauty many times of the year.

The peculiar flowers are not individual flowers, but rather clusters of many flowers. Typically, a daisy has two types of flowers that make up its inflorescence: ray flowers which mimic petals and disc flowers which make up the center. Bartlettina sordida lacks ray flowers, giving its inflorescences a puffy, petal-less appearance. The flowers are a favorite of pollinators in the garden and bloom just in time to serve as a popular meal for the pipevine swallowtails. Lean in to smell the fragrant flowers and catch the mild perfume resembling lilac and honey.

Cloud forests, which are named for the perpetual moisture that rises from humid lowlands and condenses into fog at higher elevations, are rich centers of plant biodiversity that particularly under threat from human encroachment and climate change. Thanks to San Francisco's wet winters and the summer fog, the San Francisco Botanical Garden is uniquely situated to grow the unusual flora from the cloud forests of Mexico and help preserve and protect some of its stunning biodiversity.

Bartlettina sordida will thrive in any garden with bright shade and rich moist soil. No pest or disease problems have been noted on this vigorous plant. It is, however, frost tender below 25 °F. It is easy to grow and propagate, but like many plants in Asteraceae, Bartlettina sordida is known to become weedy in habitats with ample moisture.

IN BLOOM CONTRIBUTORS: Text and profile by Sarah Callan. Photos by Joanne Taylor and Mona Bourell.

Location

Bartlettina sordida can be found
Mesoamerican Cloud Forest
24C, 24J, 26D, 29D

Visiting Info >>
Map (Bed Numbers) >>

Profile

Scientific Name Bartlettina sordida
Common Names bartlettina, purple torch
Family Asteraceae
Plant Type Perennial shrub
Environment Full sun to light shade. Needs water and good soil, best in coastal Bay Area. Some leaf and stem damage may occur with temperatures in the low 20s °F.
Bloom Large, bright purple/violet inflorescences at tips of stems in Fall through Spring.
Uses Accent plant or large showy shrub in shady areas. May become weedy in moist habitats.
 
 
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Aloe arborescens

Erica spp.

January

Edgeworthia chrysantha

Edgeworthia chrysantha

February

Edgeworthia chrysantha

Acacia pravissima

March

Ceanothus spp.

Ceanothus spp.

April

Euphoria mellifera

Euphoria mellifera

May

Bartlettina sordida

Bartlettina sordida

June

 Rhopalostylis sapida

Rhopalostylis sapida

August

 Rhopalostylis sapida

Berberis darwinii

September

 Rhopalostylis sapida

Araucaria heterophylla

October

 Jubaea chilensis

Jubaea chilensis

November

Aloe arborescens

Aloe arborescens

January

Magnolia stellata

Magnolia stellata

February

<em>Narcissus</em> spp.

Narcissus spp.

March

Cantua buxifolia

Polylepis spp.

April

Davidia involucrata

Davidia involucrata

May

Digitalis spp.

Digitalis spp.

June

Cantua buxifolia

Gunnera tinctoria

July

Cantua buxifolia

Liriodendron chinense

August

Cantua buxifolia

Cycads of the Ancient Plant Garden

September

Persea americana

Persea americana

October

Persea americana

Iochroma spp.

November

Camellia spp.

Camellia spp.

Deecember

Fitzroya cupressoides

Fitzroya cupressoides

January

Polyspora longicarpa

Polyspora longicarpa

February

Polyspora longicarpa

Magnolia laevifolia

March

Cantua buxifolia

Cantua buxifolia

April

Papaver rhoeas

Papaver rhoeas

May

Strelitzia reginae

Strelitzia reginae

June

Cestrum elegans

Cestrum elegans

July

Dichroa febrifuga

Dichroa febrifuga

August

Dichroa febrifuga

Sequoia sempervirens

September

Cestrum elegans

Salvia confertifolia

October

Cestrum elegans

Nerine bowdenii

November

Cestrum elegans

Protea lepidocarpodendron

December

Magnolia campbellii

Magnolia campbellii

January

Magnolia doltsopa

Magnolia doltsopa

February

Magnolia liliiflora

Magnolia liliiflora

March

Vireya Rhododendrons

Vireya Rhododendrons

April

Leucospermum spp.

Leucospermum spp.

May

Senna multiglandulosa

Senna multiglandulosa

June

Tagetes lemmonii

Tagetes lemmonii

July

Eucomis spp.

Eucomis spp.

August

Cuphea spp.

Cuphea spp.

September

Phyllocladus trichomanoides

Phyllocladus trichomanoides

October

Phyllocladus trichomanoides

Saurauia Madrensis

November

Pinus pseudostrobus

Pinus pseudostrobus

December

Magnolia dawsoniana

Magnolia dawsoniana

January

Magnolia campbellii 'Strybing White'

Magnolia campbellii 'Strybing White'

February

Magnolia laevifolia'Strybing Compact'

Magnolia laevifolia 'Strybing Compact'

March

Aristolochia californica

Aristolochia californica

April

Chlorogalum pomeridianum

Chlorogalum pomeridianum

May

Arbutus menziesii

Arbutus menziesii

June

Romneya coulteri

Romneya coulteri

July

Cistus sp.

Cistus sp.

August

Rosmarinus sp.

Rosmarinus sp.

September

Dahlia spp.

Dahlia spp.

October

Salvia cacaliifolia

Salvia cacaliifolia

November

Salvia cacaliifolia

Salvia microphylla
'Hot Lips'

November

Magnolia campbellii

Magnolia campbellii

January

Magnolia denudata

Magnolia denudata

February

Magnolia x veitchii

Magnolia x veitchii

March

Iris douglasiana

Iris douglasiana

April

Aesculus californica

Aesculus californica

May

Vaccinium ovatum

Vaccinium ovatum

June

Sambucus racemosa

Sambucus racemosa

July

Sequoia sempervirens

Sequoia sempervirens

August

Asarum caudatum

Asarum caudatum

September

Deppea splendens

Deppea splendens

October

Montanoa spp.

Montanoa spp.

November

Bidens sp.

Bidens sp.

December

Acer palmatum 'Sango kaku'

Acer palmatum 'Sango kaku'

January

Magnolia campbellii 'Darjeeling'

Magnolia campbellii 'Darjeeling'

February

Bomaria spp.

Bomarea spp.

March

Rhododendron occidentale

Rhododendron occidentale

April

Polystichum munitum

Polystichum munitum

May

x Chiranthofremontia lenzii

x Chiranthofremontia lenzii

June

Salvia leucantha

Salvia leucantha

July

Hydrangea seemannii

Hydrangea seemannii

August

Wollemia nobilis

Wollemia nobilis

September

Cyathea cooperi

Cyathea cooperi

October

Pinus radiata

Pinus radiata

November

Correa spp.

Correa spp.

December

Garrya elliptica

Garrya elliptica

January

Magnolia x soulangeana

Magnolia x soulangeana

February

Senecio glastifolius

Senecio glastifolius

March

Ribes spp.

Ribes spp.

April

Oxalis oregana

Oxalis oregana

May

Calandrinia grandiflora

Calandrinia grandiflora

June

Taxus baccata

Taxus baccata

July

Romneya coulteri

Romneya coulteri

August

Passiflora parritae

Passiflora parritae

September

Malvaviscus arboreus

Malvaviscus arboreus

October

Monterey Cypress

Monterey Cypress

November

Aloe arborescens

Aloe arborescens

December

Aloe plicatilis

Aloe plicatilis

January

Banksia seminuda

Banksia seminuda

February

Zantedeschia elliottiana

Zantedeschia aethiopica

March

Magnolia laevifolia

Magnolia laevifolia

April

Araucaria heterophylla

Araucaria heterophylla

May

Toxicodendron diversilobum

Toxicodendron diversilobum

June

Clarkia sp.

Clarkia sp.

July

Agapanthus

Agapanthus

August

Brugmansia

Brugmansia

September

Cedrus spp.

Cedrus spp.

October

Protea repens

Protea repens

November

Camellia sinensis

Camellia sinensis

December

Thujopsis dolabrata

Thujopsis dolabrata

January

Gordonia longicarpa

Gordonia longicarpa

February

Rojasianthe superba

Rojasianthe superba

March

Echium spp.

Echium spp.

April

Iris douglasiana

Iris douglasiana

May

Digitalis purpurea

Digitalis purpurea

June

Felicia amelloides

Felicia amelloides

July

Ceroxylon quindiuense

Ceroxylon quindiuense

August

Amaryllis belladonna

Amaryllis belladonna

September

Ginkgo biloba

Ginkgo biloba

October

Acer morrisonense

Acer morrisonense

November

Ilex aquifolium

Ilex aquifolium

December

Picea sitchensis

Picea sitchensis

January

Telanthophora grandifolia

Telanthophora grandifolia

February

Aeonium arboreum 'Schwartzkopf'

Aeonium arboreum 'Schwartzkopf'

March

Leptospermum Spp.

Leptospermum

April

Salvia gesneraeflora

Salvia gesneraeflora

May

Lavandula spp.

Lavandula spp.

June

Pelargonium

Pelargonium

July

Fuchsia paniculata

Fuchsia paniculata

August

Luma apiculata

Luma apiculata

September

Luculia

Luculia

October

Arbutus unedo

Arbutus unedo

November

Cycads

Cycad

December

Restionaceae

Restionaceae

January

Hellebores

Hellebores

February

Ceanothus

Ceanothus

March

Rhododendron

Rhododendron

April

Psoralea pinnata

Psoralea pinnata

May

Fremontodendron californicum

Fremontodendron californicum

June

Leucadendron argenteum

Leucadendron argenteum

July

Crocosmia

Crocosmia

August

Gunnera tinctoria

Gunnera tinctoria

September

Pellaea rotundifolia

Pellaea rotundifolia

October

Fuchsia boliviana

Fuchsia boliviana

November

Erica canaliculata

Erica canaliculata

December

Magnolia campbelli

Magnolia campbelli

January

Magnolia denudata

Magnolia denudata

February

Camellia

Camellia

March

Geranium maderense

Geranium maderense

April

Acmena smithii

Acmena smithii

May

Eschscholzia californica

Eschscholzia californica

June

Dendromecon harfordii

Dendromecon harfordii

July

Romneya coulteri

Romneya coulteri

August

Eupatorium purpureum

Eupatorium purpureum

September

Epilobium canum sp.

Epilobium canum sp.

October

Grevillea spp.

Grevillea spp.

November

Drimys winteri

Drimys winteri

December

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