This article is written like a research paper or scientific journal .(May 2023) |
Cosmos bipinnatus | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Asterales |
Family: | Asteraceae |
Genus: | Cosmos |
Species: | C. bipinnatus |
Binomial name | |
Cosmos bipinnatus Cav., 1791 | |
Synonyms [1] | |
Synonymy
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Cosmos bipinnatus, commonly called the garden cosmos, Mexican aster [2] or cosmea, [3] is a medium-sized flowering herbaceous plant in the daisy family Asteraceae, native to the Americas. The species and its varieties and cultivars are popular as ornamental plants in temperate climate gardens. [4] [5] [6] [7]
Cosmos bipinnatus is an annual that is often considered half-hardy, although plants may reappear via self-sowing for several years. The plant height varies from 2–6 ft to (rarely) 9 ft (0.61–1.83–2.74 m). The cultivated varieties appear in shades of pink and purple as well as white. The branched stem is usually densely to occasionally occupied by fine, split up, rough trichomes, but some specimens are completely hairless. The petiole itself is inconspicuous, winged, 10 (rarely to 15) mm long, and sometimes the leaves are almost sessile.
The partial leaves are linear-filiform to narrow linear with a width of 0.5 to 1 (rarely to 1.7) mm; the tips are pointed, hardened, but not particularly sharp. Its foliage appears as if finely cut into threadlike segments. When flowering, the plants can become top heavy. This problem is alleviated when they are grown in groups, as the bipinnate leaves interlock and the plants support each other. [8]
The achenes become blackish, are smooth or short-bristly. Their shape is spindle-like. They are rounded off into a short, 0.5 to 1.7 mm long, but distinctly pronounced rostrum. The inner achenes are up to 18 mm long, their yellowish beaks are 4 to 5 (rarely to 10) mm long. A pappus is missing or it consists only of two to three awn-like, 1-3 mm large bristles. [9]
The very conspicuous cup-shaped inflorescences have a diameter of usually 5–7 cm (2.0–2.8 in) and contain tongue and tubular flowers, which are surrounded by bracts. There are usually 8 outer bracts, and they are ovate to lanceolate-tail-shaped, 7-15 mm long, 3-5 mm wide. The inner bracts are ovate-lanceolate and 8-12 mm long. They are translucent with many black stripes and a clear edge up to 1 mm wide, sometimes with yellowish or pink pigments, the tip is ciliate. The sprout leaves have gold-yellow, thread-like tips and protrude between the tubular flowers. The broadened base of these spreader leaves is translucent, with a yellow line.
The mostly eight ray florets are pink to violet or white colored, at the base may show noticeable stains caused by anthocyanin. The tongues are reversely ovate shaped, have a length of usually 20-35 mm and a width of usually 12-20 mm. The tips are almost dull and have three broad, wavy teeth. Below that, they are greatly rejuvenated. In the center of the flower baskets is a large number of tubular flowers (also called disc florets), whose overgrown petals are yellow, turn white in the lower part and reach a length of 5-6 mm. The anthers are brownish-black and about 3 mm long, at the tips are short-triangular, translucent attachments with a length of 0.5-0.8 mm. The branches of the stylus are short and rather dull, with a length of .5 mm. [10]
This plant is native to Mexico, Guatemala and Costa Rica. Since it is used as an ornamental plant in many countries and prone to sedimentation[ clarification needed ], it is an invasive plant in many areas of the world. It has naturalized in scattered locations across North America, South America, the West Indies, Italy, Australia, and Asia, where it is a garden escape (introduced species) and in some habitats becoming a weed. [8]
Cultivars of Cosmos bipinnatus in cultivation today are listed here. Those marked agm have gained the Royal Horticultural Society's Award of Garden Merit.
Growth characteristics of this plant include:
Excessive rain can cause cultivation problems, due to the delicate nature of the stems. Heavy rain can cause breakage. Cosmos bipinnatus can tolerate heat as long as adequate moisture is provided, however, it does not handle droughts, strong winds or cold temperatures well. Snails, slugs and aphids have a taste for Cosmos bipinnatus. Successfully cultivated plants can mature 2 to 4 feet (0.61 to 1.22 m) x 12 to 18 inches (300 to 460 mm). [26]
The flowers of Cosmos bipinnatus attract birds and butterflies, [26] including the monarch butterfly. It can be part of butterfly gardening and pollinator/honey-bee habitat gardens. [26]
Alstroemeria, commonly called the Peruvian lily or lily of the Incas, is a genus of flowering plants in the family Alstroemeriaceae. They are all native to South America, although some have become naturalized in the United States, Mexico, Australia, New Zealand, Madeira and the Canary Islands. Almost all of the species are restricted to one of two distinct centers of diversity; one in central Chile, the other in eastern Brazil. Species of Alstroemeria from Chile are winter-growing plants, while those of Brazil are summer growing. All are long-lived perennials except A. graminea, a diminutive annual from the Atacama Desert of Chile.
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Salvia spathacea, the California hummingbird sage or pitcher sage, is a species of flowering plant in the family Lamiaceae, native to southern and central California growing from sea level to 610 m (2,001 ft). This fruity scented sage blooms in March to May with typically dark rose-lilac colored flowers. It is cultivated in gardens for its attractive flowering spikes and pleasant scent.
Hydrangea macrophylla is a species of flowering plant in the family Hydrangeaceae, native to Japan. It is a deciduous shrub growing to 2 m (7 ft) tall by 2.5 m (8 ft) broad with large heads of pink or blue flowers in summer and autumn. Common names include bigleaf hydrangea, French hydrangea, lacecap hydrangea, mophead hydrangea, and hortensia. It is widely cultivated in many parts of the world in many climates. It is not to be confused with H. aspera 'Macrophylla'.
Tradescantia zebrina, formerly known as Zebrina pendula, is a species of creeping plant in the Tradescantia genus. Common names include silver inch plant and wandering Jew. The latter name is controversial, and some now use the alternative wandering dude. The plant is popular in cultivation due to its fast growth and attractive foliage. It is used as a groundcover in warm winter climates, and as a houseplant elsewhere.
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Rudbeckia laciniata, the cutleaf coneflower, is a species of flowering plant in the family Asteraceae. It is native to North America, where it is widespread in both Canada and the United States. Its natural habitat is wet sites in flood plains, along stream banks, and in moist forests. Common names other than cutleaf coneflower include cutleaf, goldenglow, green-headed coneflower, tall coneflower, sochan and thimbleweed.
Fuchsia magellanica – commonly known as the hummingbird fuchsia, hardy fuchsia or chilco – is a species of flowering plant in the evening primrose family Onagraceae, native to the lower Southern Cone of southern South America.
Dicentra formosa is a species of flowering plant in the poppy family, Papaveraceae. With its fern-like foliage and inflorescence of drooping pink, purple, yellow or cream "hearts", this species is native to the United States' Pacific Northwest and West Coast of North America.
Ageratum houstonianum, commonly known as flossflower, bluemink, goatweed, blueweed, pussy foot or Mexican paintbrush, is a cool-season annual plant often grown as bedding in gardens.
Physostegia virginiana, the obedient plant, obedience or false dragonhead, is a species of flowering plant in the mint family, Lamiaceae. It is native to North America, where it is distributed from eastern Canada to northern Mexico. Physostegia are known commonly as obedient plants because a flower pushed to one side will often stay in that position. The name “false dragonhead” refers to the dragonheads of the related Dracocephalum, a genus to which the plant once belonged.
Jasminum polyanthum, the many-flowered jasmine, pink jasmine, or white jasmine, is a species of flowering plant in the olive family Oleaceae, native to China and Myanmar. A strong evergreen twining climber, it is especially noted for its abundant, highly fragrant pink to white flowers.
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Stewartia malacodendron, the silky camellia, silky stewartia or Virginia stewartia, is a species of flowering plant in the family Theaceae. It grows slowly into a large deciduous shrub or small tree, typically 3–4.5 m (10–15 ft) tall, but sometimes as tall as 9 m (30 ft). It is native to the southeastern United States.
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Pilea cadierei is a species of flowering plant in the nettle family Urticaceae. The species is endemic to the southern Chinese provinces of Guizhou and Yunnan, as well as Vietnam. The specific epithet cadierei refers to the 20th-century botanist R.P. Cadière. P. cadierei has earned the Royal Horticultural Society's Award of Garden Merit for its hardiness and reliability as a houseplant. In warmer countries, usually within USDA zones 8-12, the plant may be grown outside year-round as a perennial, either in-ground or contained, and pruned about 50% during the autumn.
Lathyrus vernus, the spring vetchling, spring pea, or spring vetch, is a species of flowering herbaceous perennial plant in the genus Lathyrus, native to forests of Europe and Siberia. It forms a dense clump of pointed leaves with purple flowers in spring, shading to a greenish-blue with age.
Diascia is a genus of around 70 species of herbaceous annual and perennial flowering plants of the family Scrophulariaceae, native to southern Africa, including South Africa, Lesotho and neighbouring areas.
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