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Combined with the five-kingdom model, this created a six-kingdom model, where the kingdom Monera is replaced by the kingdoms Bacteria and Archaea. [16] This six-kingdom model is commonly used in recent US high school biology textbooks, but has received criticism for compromising the current scientific consensus. [ 13 ]
Gyrinops walla [2] is a species of plant in the family Thymelaeaceae. It was described by Joseph Gaertner. The tree grows up to 15m high. Its bark is thin and brownish-grey color. Leaves are 1-6mm long and yellowish-white flower's pedicels are 3-4mm long. [3] Gyrinops walla is found in wet zone of Sri Lanka and very rarely
Three goals of plant taxonomy are the identification, classification and description of plants. The distinction between these three goals is important and often overlooked. Plant identification is a determination of the identity of an unknown plant by comparison with previously collected specimens or with the aid of books or identification manuals.
Mitragyna parvifolia is a tree species found in Asia, [2] [3] native to India and Sri Lanka. Mitragyna species are used medicinally and for their fine timber throughout the areas where they grow. M. parvifolia reaches heights of 50 feet with a branch spread over 15 feet. The stem is erect and branching. Flowers are yellow and grow in ball ...
The plants have an underground sexual phase that produces gametes, and this alternates in the lifecycle with the spore-producing plant. The prothallium developed from the spore is a subterranean mass of tissue of considerable size, and bears both the male and female organs ( antheridia and archegonia ). [ 6 ]
Vincetoxicum bracteatum, synonyms including Tylophora pauciflora, is a species of climbing plant in the family Apocynaceae. [1] It is commonly known as kiri aguna in Sri Lanka. It is edible and is used in traditional medicine. [2] It was first described by Carl Peter Thunberg in 1821 as Cynanchum bracteatum. [3]
The US was the largest alfalfa producer in the world by area in 2009, with 9 million hectares (22 million acres), but considerable production area is found in Argentina (6.9 million hectares; 17 million acres), Canada (2 million hectares; 4.9 million acres), Russia (1.8 million hectares; 4.4 million acres), Italy (1.3 million hectares; 3.2 ...
The plants in this family are grown around the tropics and in temperate areas of the world, where those with edible fruits were among the earliest cultivated plants in both the Old and New Worlds. The family Cucurbitaceae ranks among the highest of plant families for number and percentage of species used as human food. [ 5 ]