Biology:Portulaca grandiflora
| Portulaca grandiflora | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Portulacaceae |
| Genus: | Portulaca |
| Species: | P. grandiflora
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| Binomial name | |
| Portulaca grandiflora Hook.
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| Synonyms[1] | |
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Portulaca grandiflora is a succulent flowering plant in the purslane family Portulacaceae, native to southern Brazil , Argentina , and Uruguay and often cultivated in gardens.[2][3] It has many common names, including rose moss,[4] eleven o'clock,[3] Mexican rose,[3] moss rose,[3] sun rose,[5] table rose,[citation needed] rock rose,[5] and moss-rose purslane. Despite these names and the superficial resemblance of some cultivars' flowers to roses, it is not a true rose, nor even a part of the rose family or rosid group; rather, it is much more closely related to carnations and cacti.
It is also seen in South Asia and widely spread in most of the cities with old 18th- and 19th-century architecture in the Balkans.
Description
It is a small, but fast-growing annual plant growing to 30 cm tall, though usually less. However, if it is cultivated properly, it can easily reach this height. The leaves are thick and fleshy, up to 2.5 cm long, arranged alternately or in small clusters. The flowers are 2.5–3 cm diameter with five petals, variably red, orange, pink, white, and yellow.[2] Their upright, or ascending, long shoots branch usually near the base. The spreading 20-to-25-millimeters-long and 2-to-3-millimeters-wide leaves are almost or completely stalk-shaped, and taper towards the tip.
The axillary leaves have few to numerous whitish, woolly hairs which are usually shorter than the sheets. The compressed inflorescences are surrounded by eight to ten leaves. The large flowers reach a diameter of up to 4 centimetres. The five bright magenta-coloured petals are obovate and 15 to 26 millimeters long. Around the ovary with four to nine whitish scars are about 50 stamens. Capsules and seeds are not visible.[6]
P. grandiflora is one of the few plants that is a C4/CAM intermediate, utilizing both C4 carbon fixation and Crassulacean acid metabolism pathways in different cells for photosynthesis.[7]
Cultivation and uses
Numerous cultivars have been selected for double flowers with additional petals, and for variation in flower colour, plain or variegated.[2] It is widely grown in temperate climates as an ornamental plant for annual bedding or as a container plant. It requires ample sunlight and well-drained soils. It requires almost no attention and spreads itself very easily. In places with old architecture it can grow between the stones of the road or sidewalk. Seeds are often sold as mixtures, such as Double Flowering Mixture (see illustrations). It grows on sandy soils. In countries with a frost-free climate, it is wild.[8][9]
Unlike P. oleracea and P. umbraticola , it is not edible because of its bitter taste. There are hybrids of P. grandiflora with P. oleracea, umbraticola and villosa.
It is visited by honeybees for its pollen and nectar.[10]
Gallery
Portulaca Grandiflora in India
Portulaca Grandiflora bicolour
Portulaca grandiflora in India
Portulaca grandiflora in India , which is in a tob
Traditional Brazil ian sort of Portulaca grandiflora
Portulaca grandiflora double flower variety
Mixed Portulaca grandiflora growth
Portulaca Grandiflora white variety in Pakistan
Single leaves.
Portulaca grandiflora. 2018 Taichung World Flora Exposition, Taiwan.
Cultivar with double flowers
References
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Wikimedia Commons has media related to Portulaca grandiflora. |
- ↑ "The Plant List: A Working List of All Plant Species". http://www.theplantlist.org/tpl1.1/record/kew-2573991.
- ↑ 2.0 2.1 2.2 Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan ISBN:0-333-47494-5.
- ↑ 3.0 3.1 3.2 3.3 {{citation | mode = cs1 | title = Portulaca grandiflora | work = Germplasm Resources Information Network (GRIN) | url = | publisher = [[Organization:Agricultural Research ServAgricultural Research Service (ARS), United States Department of Agriculture (USDA) | access-date = 10 January 2018 }}
- ↑ "Portulaca grandiflora". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=POGR7. Retrieved 31 January 2016.
- ↑ 5.0 5.1 Mitchell, H. (2003). The Essential Earthman: Henry Mitchell on Gardening. Indiana University Press. p. 113. ISBN 9780253215857. https://books.google.com/books?id=O5fRmqDualkC.
- ↑ Urs Eggli (ed.): Succulent Encyclopedia. Dicots (dicotyledons) . Eugen Ulmer, Stuttgart 2001, ISBN:3-8001-3662-7 , pp. 437-438 .
- ↑ Guralnick, Lonnie; Gilbert, Kate; Denio, Diana; Antico, Nicholas (2020-01-01). "The Development of Crassulacean Acid Metabolism (CAM) Photosynthesis in Cotyledons of the C4 Species, Portulaca grandiflora (Portulacaceae)". Plants 9 (1): 55. doi:10.3390/plants9010055. PMID 31906418. PMC 7020464. https://docs.rwu.edu/fcas_fp/401.
- ↑ Blumea. Tijdschrift voor de Systematiek en Geography of the Plants . Volume 17, No. 2, p. 297, Leiden 1969
- ↑ Botanical Magazine; or, Flower-Garden Displayed . Volume 56, Plate 2885. London 1829
- ↑ "Portulaca grandiflora & Apis mellifera" (in fr). 2012-09-09. http://www.florabeilles.org/serie/portulaca-grandiflora_apis-mellifera.
Wikidata ☰ Q159547 entry
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