Senna pendula

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Senna pendula
Starr 070111-3260 Senna pendula.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Caesalpinioideae
Genus: Senna
Species:
S. pendula
Binomial name
Senna pendula
(Humb. & Bonpl. ex Willd.) H.S.Irwin & Barneby

Senna pendula, also known as Easter Cassia, Christmas Senna, [lower-alpha 1] winter Senna, [lower-alpha 2] climbing Cassia, golden shower, pendant Senna and valamuerto, [1] is a plant of the Fabaceae family with a shrub habit that is native to South America. It used in various parts of the world as an ornamental plant and is an environmental weed in Australia. The flowers are yellow and the name pendula means 'pendulous' or 'drooping'. [2]

Contents

Description

Flower close-up Winter Senna (Senna pendula) flowers (28914825366).jpg
Flower close-up
Shrubland naturalisation Senna pendula 3.jpg
Shrubland naturalisation

It is a fast-growing, [3] spreading, scrambling or erect shrub that reaches 2–4 metres in height with multi-branched and arching stems and branches. Its single-compound, hairless leaves feature three to six duos of wide leaflets that are 1–5 cm long and 5–20 mm wide with rounded tips and salient yellowish margins. [4]

Its bright yellow flowers, which are about 3 cm across, have five large petals and are foaled in leafy clumps at the tips of the branches. The fruit is in a cylindrical pod (10–20 cm long and 6–12 mm wide) that hangs down. It flowers prominently at Easter in the southern hemisphere (or early autumn), hence its common name. It also has an insignificant flowering season in early summer (around Christmas in the southern hemisphere). [5]

Senna pendula is distinguished from Senna bicapsularis which has 3 pairs of leaflets on each leaf, while this one has 4-7 pairs of leaflets on each leaf and a gland between each pair of leaflets. 'S. bicapsularis' has flowers borne on rather short pedicels (flower stalks) that are less than half a centimeter in length, whereas 'S. pendula' has flowers borne on longer (1 to 3 cm) pedicels. 'S. pendula' may flower from as early as late summer, whereas S. bicapsularis blooms from late autumn to winter. [6]

Invasive species

The S. p. glabrata variety has become naturalised, and is also an environmental weed, in eastern Australia in the coastal and sub-coastal regions of south-eastern Queensland and New South Wales, where it is found in watercourses, gardens, disturbed sites, wastelands, roadsides, closed forests, forest margins and urban bushland. [7]

It is spread by seed, suckers and dumped garden waste. [8] Despite it being invasive, it is not a prohibited or restricted invasive plant under the Biosecurity Act 2015. [9]

Cultivation

Senna pendula was introduced as a garden plant in Australia in 1957, where it was described in a Brisbane nursery catalogue as, "a useful shrub bearing masses of buttercup-shaped flowers in autumn and early winter". Much sought for, gardeners had paid four shillings to purchase this plant during the mid 20th century. The shrub was in the market for many decades, though now it is no longer sold due its invasive nature. [10]

In Florida, Senna pendula is usually cultivated as, and misapplied to, Senna bicapsularis. An investigation of herbarium specimens from the University of Florida, University of South Florida, and Fairchild Tropical Botanic Garden had suggested that true Senna bicapsularis is very scarce in cultivation in Florida, whereas Senna pendula is more common and widespread. [11] [6]

Subspecies

A large Easter cassia Senna pendula5.jpg
A large Easter cassia

The plant features the following subspecies: [12]

Notes

  1. Known as such in the southern hemisphere due its minor flowering season around Christmastime, although this name is also applied to Senna bicapsularis.
  2. Known as such in the northern hemisphere due to its flowering in early wintertime.

Related Research Articles

<i>Cassia</i> (genus) Genus of legumes

Cassia is a genus of flowering plants in the legume family, Fabaceae, and the subfamily Caesalpinioideae. Species are known commonly as cassias. Cassia is also the English common name of some species in the genus Cinnamomum of the family Lauraceae. Species of the genera Senna and Chamaecrista were previously included in Cassia. Cassia now generally includes the largest species of the legume subtribe Cassiinae, usually mid-sized to tall trees.

<i>Senna spectabilis</i> Species of legume

Senna spectabilis is a plant species of the legume family (Fabaceae) in the subfamily Caesalpinioideae native to South and Central America. They are often grown as an ornamental in front yards, parks, gardens, buildings etc. due to their bright yellow flowers that bloom during the summer months. They are also known as golden wonder tree, American cassia, popcorn tree, Cassia excelsa, golden shower tree or Archibald's cassia.

<i>Senna tora</i> Species of flowering plant

Senna tora is a plant species in the family Fabaceae and the subfamily Caesalpinioideae. Its name is derived from its Sinhala name tora (තෝර). It grows wild in most of the tropics and is considered a weed in many places. Its native range is in Central America. Its most common English name is sickle senna or sickle wild sensitive-plant. Other common names include sickle pod, tora, coffee pod and foetid cassia. It is often confused with Chinese senna or sickle pod, Senna obtusifolia.

<i>Senna</i> (plant) Genus of flowering leguminous plants

Senna, the sennas, is a large genus of flowering plants in the legume family. This diverse genus is native throughout the tropics, with a small number of species in temperate regions. The number of species is estimated to be from about 260 to 350. The type species for the genus is Senna alexandrina. About 50 species of Senna are known in cultivation.

<i>Senna alexandrina</i> Species of legume

Senna alexandrina is an ornamental plant in the genus Senna. It is used in herbalism. It grows natively in upper Egypt, especially in the Nubian region, and near Khartoum (Sudan), where it is cultivated commercially. It is also grown elsewhere, notably in India and Somalia.

<i>Senna artemisioides</i> Species of plant

Senna artemisioides, commonly known as silver cassia, is a species of flowering plant in the family Fabaceae and is endemic to Australia, where it is found in all mainland states and territories. It is a small, woody shrub with silver-green leaves and yellow flowers.

<i>Senna bicapsularis</i> Species of legume

Senna bicapsularis is a species of the legume genus Senna, native to northern South America, from Panama south to Venezuela and Colombia, and also the West Indies. Common names include rambling senna, winter cassia, Christmas bush, money bush, and yellow candlewood. In Florida, Senna pendula is usually cultivated as, and misapplied to, S. bicapsularis.

Senna wislizeni, commonly called Wislizenus' senna or shrubby senna. Formerly in the "wastebin taxon" Cassia sensu lato, it is now placed in the genus Senna or sometimes separated in Palmerocassia together with Senna unijuga.

<i>Senna gaudichaudii</i> Species of plant

Senna gaudichaudii, also known by many common names, including kolomana in Hawaii and as blunt-leaved senna in Australia, is a species of flowering plant in the family Fabaceae and is native to some Pacific Islands including Hawaii, parts of Southeast Asia and Queensland in Australia. It is shrub or small tree with pinnate leaves, usually with three to five pairs of oblong to egg-shaped leaflets, and yellow flowers arranged in groups of four to ten, with ten fertile stamens in each flower.

<i>Senna acclinis</i> Species of legume

Senna acclinis, commonly known as rainforest cassia or brush senna, is a species of flowering plant in the family Fabaceae and is endemic to near-coastal areas of eastern Australia. It is a shrub with pinnate leaves and bright golden yellow flowers in groups of two to five and long, narrow seed pods. It is similar to other species of Senna that are environmental weeds.

<i>Chamaecrista absus</i> Species of plant in the family Fabaceae

Chamaecrista absus, the pig's senna or tropical sensitive pea, is a species of flowering plant in the family Fabaceae, with a worldwide distribution in the tropics and subtropics. An annual herb reaching 60 cm (24 in), it is a common weed of cultivated and waste places, and its seeds are regularly harvested and sold for use in traditional medicine in Africa and Asia.

<i>Senna aciphylla</i> Species of legume

Senna aciphylla, commonly known as sprawling senna or Australian senna, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a sprawling shrub with pinnate leaves with eight to twelve pairs of linear to narrowly elliptic leaflets, and yellow flowers in pairs or groups of three.

<i>Senna barclayana</i> Species of legume

Senna barclayana, commonly known as smooth senna or pepper-leaf senna, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a herbaceous perennial or subshrub with pinnate leaves with six to ten pairs of lance-shaped or narrowly elliptic leaflets, and yellow flowers in groups of six to ten.

<i>Senna cardiosperma</i> Species of legume

Senna cardiosperma is a species of flowering plant in the family Fabaceae and is endemic to the western half of Australia. It is an erect shrub or small tree with pinnate leaves, the number and shape of the leaflets depending on subspecies, yellow flowers with ten fertile stamens in each flower, and flat pods.

<i>Senna circinnata</i> Species of legume

Senna circinnata, commonly known as coiled cassia, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a shrub or small tree with pinnate leaves with one to three pairs of egg-shaped leaflets, and small groups of yellow flowers in upper leaf axils.

<i>Senna clavigera</i> Species of legume

Senna clavigera, commonly known as pepper leaf senna, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a perennial herb with pinnate leaves with four to seven pairs of lance-shaped to elliptic leaflets, and groups of four to twenty yellow flowers in upper leaf axils.

<i>Senna coronilloides</i> Species of legume

Senna coronilloides, commonly known as brigalow senna, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is an erect, sprawling shrub with pinnate leaves with nine to twelve pairs of elliptic leaflets, and groups of three to five yellow flowers in upper leaf axils.

<i>Senna costata</i> Species of legume

Senna costata is a species of flowering plant in the family Fabaceae and is endemic to northern Australia. It is a shrub or small tree with pinnate leaves with four or five pairs of narrowly elliptic leaflets, and yellow flowers arranged in pairs or groups of five to eight, with ten fertile stamens in each flower.

Senna flexuosa is a species of flowering plant in the family Fabaceae and is endemic to Western Australia. It is an erect or spreading shrub with pinnate leaves with ten to thirteen pairs of egg-shaped leaflets, and yellow flowers arranged in groups of three to five, with ten fertile stamens in each flower.

Senna glaucifolia is a species of flowering plant in the family Fabaceae and is endemic to arid Central Australia. It is an erect shrub with pinnate leaves with two to four pairs of elliptic leaflets, and yellow flowers arranged in groups of four to seven, with ten fertile stamens in each flower.

References

  1. Senna pendula var. Glabrata by Weeds of Australia (biosecurity Queensland edition), Queensland Government. Retrieved 13 April 2020
  2. Irwin, HS & Barneby, RC, 1982 Mem.New York Bot.Gard.35: 1-918 [in 2 parts] American Cassiinae
  3. Senna pendula (Humb. & Bonpl. ex Willd.) H.S.Irwin & Barneby by Weeds Australia
  4. F.A.Zich; B.P.M.Hyland; T.Whiffen; R.A.Kerrigan (2020). "Senna pendula var. glabrata". Australian Tropical Rainforest Plants Edition 8 (RFK8). Centre for Australian National Biodiversity Research (CANBR), Australian Government . Retrieved 28 June 2021.
  5. Irwin.H.S.& Barneby,R.C., 1982 Mem.N.Y.Bot.Gard.35(1 & 2):1-918 The American Cassiinae
  6. 1 2 Christmas Cassia Causes Confusion By Marc Frank, University of Florida
  7. Easter cassia Senna pendula var. Glabrata by the Brisbane City Council Weed Identification Tool. Retrieved 13 April 2020
  8. Cassia (Senna pendula var. Glabrata) by NSW WeedWise
  9. Easter cassia by Business Queensland from Queensland Government
  10. Easter blooms bring hidden menace by Annette McFarlane from The Courier
  11. Senna bicapsularis Institute for Systematic Botany, University of South Florida, Tampa.
  12. Hyde, M.A., Wursten, B.T. & Ballings, P. (2013). Flora of Zimbabwe: Species information: Senna pendula var. glabrata.