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In Bloom

Senna multiglandulosa Buttercup Bush
 
Senna multiglandulosa at San Francisco Botanical Garden

Senna multiglandulosa. Photo by Mona Bourell.

Senna multiglandulosa at San Francisco Botanical Garden by Mona Bourell Senna multiglandulosa at San Francisco Botanical Garden by Mona Bourell Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Joanne Taylor Senna multiglandulosa at San Francisco Botanical Garden by Mona Bourell
 

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Visit the back entrance to the Exhibition Garden today! It is a riot of color. Buttercup Bush and Marmalade Bush are blooming at the same time, and the area is brilliant with shades of yellow, orange and gold.

Known also as Downy Senna, and with botanical synonyms of Cassia tomentosa, and Cassia multiglandulosa, Buttercup Bush is widespread across the warmer parts of the world as a cultivated ornamental. Usually a shrub, it can become tree-like (up to 12 feet) with multi-stems giving a striking appearance in the garden. Senna requires lots of sunlight and is tolerant of drought, yet adjusts to moist conditions too. Nor is it particular about soil conditions. It can even be grown as an annual and can be replaced if winter temperatures drop too low for its survival. Its suckering habit, sending up secondary stems from its roots, allows it to become invasive in some climates. In New Zealand it has become naturalized and is considered a weed!

Senna is a woolly shrub with long compound leaves divided into 10 to 14 leaflets. Canary-yellow, five-petaled flowers, drooping in racemes, can completely cover the bush. Inside each bloom are seven fertile stamens, their anthers covered with brown pollen, and three staminodes, smaller sterile stamens. The fruits are long inflated hairy pods that hang with many beans inside. The seeds of various species have played a part in herbal and folk medicines over millennia.

Senna multiglandulosa is native from Mexico to Guatemala, and parts of South America. It spreads easily and is also found on the islands of the Caribbean, in Florida, wherever it finds humid tropical weather. There are almost 300 other species of Senna that are found mainly in tropical areas of the Americas but also in Africa. Our fog and mild climate permit many plants like Senna to thrive at the Garden, giving them extra moisture and moderate temperatures.

IN BLOOM CONTRIBUTORS: Text: Kathy McNeil. Photos: Joanne Taylor, Mona Bourell.

Location

Senna multiglandulosa can be found in the Exhibition Garden (Beds 3H, 3I, 3M) and the Chilean Garden (Bed 57A)
Visiting Info >>
Map (Bed Numbers) >>

Profile

Scientific Name Senna multiglandulosa
Family Fabaceae
Plant Type Shrub
Environment Buttercup Bush should be grown in full sunlight. It is very adaptable to both dry and moist locations, and should do fine under typical garden conditions. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution.
Bloom Mid-winter through early summer.
Uses Excellent as a loose screen or tall border planting; can be invasive
More Info In its native humid mountainous regions of Central and South America, the flowers are used in stews, the root stems and leaves used for dyes, and the branches are often used to make baskets. Traditional medicinal uses include protecting against fever, typhoid, and dysentery.
 
 
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Leucospermum spp.

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Senna multiglandulosa

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Aristolochia californica

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Chlorogalum pomeridianum

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Arbutus menziesii

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Cistus sp.

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Magnolia denudata

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Magnolia x veitchii

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Iris douglasiana

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April

Aesculus californica

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May

Vaccinium ovatum

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June

Sambucus racemosa

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Sequoia sempervirens

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Asarum caudatum

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Deppea splendens

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Montanoa spp.

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Bidens sp.

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Acer palmatum 'Sango kaku'

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Magnolia campbellii 'Darjeeling'

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February

Bomaria spp.

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Rhododendron occidentale

Rhododendron occidentale

April

Polystichum munitum

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x Chiranthofremontia lenzii

x Chiranthofremontia lenzii

June

Salvia leucantha

Salvia leucantha

July

Hydrangea seemannii

Hydrangea seemannii

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Wollemia nobilis

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Cyathea cooperi

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Pinus radiata

Pinus radiata

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Correa spp.

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Garrya elliptica

Garrya elliptica

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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

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August

Passiflora parritae

Passiflora parritae

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Malvaviscus arboreus

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Monterey Cypress

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November

Aloe arborescens

Aloe arborescens

December

Aloe plicatilis

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January

Banksia seminuda

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February

Zantedeschia elliottiana

Zantedeschia aethiopica

March

Magnolia laevifolia

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April

Araucaria heterophylla

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May

Toxicodendron diversilobum

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Clarkia sp.

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Agapanthus

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Brugmansia

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Cedrus spp.

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Protea repens

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Camellia sinensis

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Thujopsis dolabrata

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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

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August

Luma apiculata

Luma apiculata

September

Luculia

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Arbutus unedo

Arbutus unedo

November

Cycads

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Restionaceae

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January

Hellebores

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February

Ceanothus

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March

Rhododendron

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April

Psoralea pinnata

Psoralea pinnata

May

Fremontodendron californicum

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Leucadendron argenteum

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Gunnera tinctoria

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Camellia

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March

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Geranium maderense

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Acmena smithii

May

Eschscholzia californica

Eschscholzia californica

June

Dendromecon harfordii

Dendromecon harfordii

July

Romneya coulteri

Romneya coulteri

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Eupatorium purpureum

Eupatorium purpureum

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Epilobium canum sp.

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Grevillea spp.

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Drimys winteri

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