Quercus lanata

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Quercus lanata
Systematics
Order : Beech-like (Fagales)
Family : Beech family (Fagaceae)
Genre : Oak trees ( Quercus )
Subgenus : Quercus
Section : Quercus
Type : Quercus lanata
Scientific name
Quercus lanata
Sm.

Quercus lanata is a plant from the genus of oak ( Quercus ) in the family of Fagaceae (Fagaceae). It isnative tothe Himalayas as well as southern and southeastern Asia.

description

Vegetative characteristics

Quercus lanata grows as an evergreen tree that can reach heights of up to 30 meters. The bark of the young twigs is initially thickly covered with grayish brown hair, but over time it becomes bald.

The alternate and spirally arranged leaves on the branches are divided into a petiole and a leaf blade. The petiole, initially covered with shaggy, grayish-brown hair, becomes bald over time and is 0.5 to 1.5 centimeters long. The simple, thin-leather leaf blade is 9 to 20 centimeters long and 3 to 8.5 centimeters wide and is approximately ovate-lanceolate to elliptical in shape, with a broadly wedge-shaped to rounded blade base and a pointed tip. The edges of the spread are sharply sawn. The upper side of the leaf is densely hairy, especially along the central vein, while the underside of the leaf is densely covered with grayish and star-shaped hairs and becomes bald over time. 12 to 17 leaf veins branch off from each side of the leaf central nerve. The underside of the leaf shows a conspicuous leaf veins.

Generative characteristics

Quercus lanata is single-sexed ( monoecious ). The flowering period in China extends from June to July and the fruits ripen in June to July of the following year. The female, 4 to 14 centimeters long inflorescences are side by side on the annual wood. The grayish brown hairy bracts are triangular shaped with a size of about 0.1 centimeters.

Ten or more acorns, a nut fruit , are formed as fruits. These are surrounded by a quarter to half of a cup-shaped fruit cup with a length of 0.6 to 1 centimeter and a diameter of 0.8 to 1.5 centimeters . The fruit cup is about 1 millimeter thick. With a length of 1.5 to 2 centimeters and a diameter of 1 to 1.2 centimeters, the bald glans is egg-shaped to conical. The stylus foot has a diameter of about 0.1 centimeters.

Occurrence

The natural range of Quercus lanata includes the Himalayas and parts of southern and southeastern Asia. It stretches from the Indian state of Assam , Nepal and the autonomous region of Tibet via Bhutan , the Chinese provinces of Guangxi , Sichuan and Yunnan to Myanmar , Vietnam and northern Thailand . There are also occurrences in Sri Lanka .

Quercus lanata thrives in China in moderately humid mixed forests at altitudes of 1900 to 3000 meters.

Systematics

The first description as Quercus lanata was in 1814 by James Edward Smith in Abraham Rees ' The Cyclopaedia; or, Universal Dictionary of Arts, Sciences and Literature . Synonyms for Quercus lanata Sm. Are Quercus leucotrichophora A. Camus ex Bahadur and Quercus tungmaiensis Y.T.Chang .

According to R. Govaerts, the following subspecies are distinguished:

  • Quercus lanata subsp. lanata (Syn .: Quercus banga Buch.-Ham. ex D.Don , Quercus banga Ham. ex Hook. Quercus lanuginosa D.Don , Quercus nepaulensis Desf. , Quercus lanuginosa subsp. eulanuginosa A. Camus ): You in Sri Lanka as well in the Himalayas and the Chinese provinces of Yunnan and Sichuan.
  • Quercus lanata subsp. leiocarpa (A.Camus) Menitsky (Syn .: Quercus lanata var. leiocarpa A.Camus ): It occurs in the Indian state of Assam and in Indochina .

swell

  • Chengjiu Huang, Yongtian Zhang & Bruce Bartholomew: Fagaceae . Quercus. In: Wu Zheng-Yi, Peter H. Raven (Ed.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, Quercus lanata , p. 379 (English, " Quercus lanata - Online " - this work is online with the same text). (Sections Description, Occurrence and Systematics)

Individual evidence

  1. ↑ a b c d e f Chengjiu Huang, Yongtian Zhang & Bruce Bartholomew: Fagaceae . Quercus. In: Wu Zheng-Yi, Peter H. Raven (Ed.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, Quercus lanata , p. 379 (English, " Quercus lanata - Online " - this work is online with the same text). (Sections Description, Occurrence and Systematics)
  2. ↑ a b c d e Rafaël Govaerts (ed.): Quercus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved December 2, 2019.
  3. ↑ Quercus lanata at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved December 2, 2019.