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Pakistan has conifer forests in most of the northern and north-western highlands. These occur from 1,000 to 4,000 m altitudes. These occur from 1,000 to 4,000 m altitudes. Swat , Upper Dir , Lower Dir , Malakand , Mansehra and Abbottabad districts of Khyber Pakhtunkhwa (formerly North-West Frontier Province) are the main areas covered with ...
The largest herbarium in Pakistan, it was established in 1975 with Dr. Ralph Randles Stewart's collection as its initial beginning. [1] It has a collection of over 100,000 plants. The plants in the herbarium are divided into magnoliophytes ( dicotyledons and monocotyledons ), gymnosperms , and pteridophytes (or ferns) and they are placed ...
180° (or 1 ⁄ 2): two leaves in one circle (alternate leaves) 120° (or 1 ⁄ 3): three leaves in one circle; 144° (or 2 ⁄ 5): five leaves in two gyres; 135° (or 3 ⁄ 8): eight leaves in three gyres. Most divergence angles are related to the sequence of Fibonacci numbers F n. This sequence begins 1, 1, 2, 3, 5, 8, 13; each term is the ...
Prosopis cineraria, also known as Persian mesquite or ghaf, is a species of flowering tree in the pea family, Fabaceae.It is native to arid portions of Western Asia and the Indian Subcontinent, including Afghanistan, Bahrain, Iran, India, Oman, Pakistan, Saudi Arabia, the United Arab Emirates, and Yemen.
The epidermis is the outermost cell layer of the primary plant body. In some older works the cells of the leaf epidermis have been regarded as specialized parenchyma cells, [1] but the established modern preference has long been to classify the epidermis as dermal tissue, [2] whereas parenchyma is classified as ground tissue. [3]
H.L. Li, The Garden Flowers of China, [8] notes that in the third century CE, jasmines identifiable as J. officinale and J. sambac were recorded among "foreign" plants in Chinese texts, and that in ninth-century Chinese texts J. officinale was said to come from Byzantium. Its Chinese name, Yeh-hsi-ming is a version of the Persian and Arabic ...
The green, photosynthetic part of the plant is technically a megaphyll and in ferns, it is often called a frond. New leaves typically expand by the unrolling of a tight spiral called a crozier or fiddlehead into fronds. [9] This uncurling of the leaf is termed circinate vernation. Leaves are divided into two types: sporophylls and tropophylls.
The National Library of Pakistan (Urdu: قومى کتب خانہ پاکستان) is located in the vicinity of the Red Zone, Islamabad, Pakistan. [4] Argued to be the country's oldest cultural institution, the library is a leading resource for information — ancient and new. [ 5 ]