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.
Senna covesii is a perennial subshrub in the family Fabaceae, native to the Mojave Desert and Sonoran Desert in southeastern California, southern Nevada, and Arizona in the United States, and northern Baja California in Mexico. It is found on desert plains and in sandy washes between 500 and 600 m above sea level, and is very common in Joshua Tree National Park. The specific epithet honors ornithologist Elliott Coues.
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.
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.
Boronia muelleri, commonly known as the forest boronia or pink boronia, is a flowering plant that occurs in forest, woodland and heath in Victoria and New South Wales in Australia. It is an erect, woody shrub or small tree with pinnate leaves and up to fifteen pink to white four-petalled flowers arranged in leaf axils in spring and summer.
Zanthoxylum brachyacanthum, known as thorny yellow-wood, satinwood, satin tree or scrub mulga, is a species of flowering plant in the family Rutaceae and is endemic to north-eastern Australia. It is a rainforest shrub or tree with thick, cone-shaped spines on the trunk and prickles on the branches, pinnate leaves, and male and female flowers arranged in panicles.
Boronia fraseri, commonly known as Fraser's boronia, is a plant in the citrus family occurring near Sydney in Australia. It is an erect, multi-branched shrub with pinnate leaves and pink flowers arranged in small groups in the leaf axils.
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.
Boronia alulata is a plant in the citrus family, Rutaceae and is endemic to Cape York Peninsula. It is an erect shrub with many branches, pinnate leaves and pink or white, four-petalled flowers.
Boronia thujona, commonly known as the bronzy boronia, is a plant in the citrus family Rutaceae and is endemic to near coastal areas of southern New South Wales. It is a shrub or small tree with aromatic, pinnate leaves and groups of between two and six bright pink flowers in the leaf axils.
Boronia crassifolia is a plant in the citrus family, Rutaceae and is endemic to the south-west of Western Australia. It is a small, slender shrub with pinnate leaves, and yellowish green to brownish, four petalled flowers.
Boronia filicifolia is a plant in the citrus family, Rutaceae and is endemic to the far north-west of Australia. It is an erect or sprawling shrub with many branches, pinnate leaves with up to 55 leaflets and white to pink flowers with the sepals a similar length to the petals.
Cyanothamnus penicillatus is a plant in the citrus family, Rutaceae and is endemic to the south-west of Western Australia. It is a low, spreading shrub with pinnate leaves and white flowers with four petals and eight stamens.
Boronia tolerans is a plant in the citrus family, Rutaceae and is endemic to a small area in the Northern Territory in Australia. It is an erect shrub with many branches, pinnate leaves and white, four-petalled flowers. It is only known from Nitmiluk National Park.
Senna pendula, also known as Easter Cassia, Christmas Senna, winter Senna, climbing Cassia, golden shower, pendant Senna and valamuerto, 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'.
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.
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.
Senna barronfieldii, commonly known as southern cassia, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is an erect shrub with more or less glabrous, pinnate leaves with eight to thirteen pairs of lance-shaped or elliptic leaflets, and yellow flowers in groups of three to five.
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.
Senna charlesiana is a species of flowering plant in the family Fabaceae and is endemic to Western Australia. It is an erect shrub with cylindrical leaves, sometimes with one or two pairs of cylindrical leaflets, and yellow flowers arranged in pairs or groups of three or four, with ten fertile stamens in each flower.
