Pyrus pyrifolia

From Fkims
Jump to: navigation, search
                           Pyrus pyrifolia (N. L. Burman) Nakai, Bot. Mag. (Tokyo). 40: 564. 1926.
File:Pyrus pyrifolia var culta2.jpg
Flowers of Pyrus pyrifolia

Nomenclature and Taxonomy

File:Nashi pear.jpg
A fruit of Pyrus pyrifolia

Pyrus pyrifolia is commonly known as Sand pear, Pinapple pear, Chinese pear, Apple pear [1] while it is called Naspaati in Nepali.

Plant Description

Pyrus pyrifolia is a tree to 7–15 m tall. Branchlets are purplish brown or dark brown when old, terete, tawny villous or tawny tomentose when young, soon glabrescent, glabrous when old, sparsely lenticellate; buds are narrowly ovoid, apex obtuse; scales are tomentose at margin and apex. Stipules are caducous, linear-lanceolate, 1–1.5 cm, membranous, margin villous and entire, apex acuminate; with petiole 3–4.5 cm, initially tomentose, glabrescent; leaf blade ovate-elliptic or ovate, 7–12 × 4–6.5 cm, glabrous or brown lanate when young, base rounded or subcordate, rarely broadly cuneate, margin spinulose-serrate, apex acute. Inflorescences are raceme of umbel-like, 6–9-flowered; peduncle is sparsely pubescent when young; bracts are caducous, linear, 1–1.4 cm, membranous, villous at margin, apex acuminate. Pedicel is 3.5–5 cm; sparsely pubescent when young. Flowers are 2.5–3.5 cm in diam. Hypanthium cupular, abaxially glabrous. Sepals are triangular-ovate, ca. 5 mm, abaxially glabrous, adaxially brown tomentose, margin glandular denticulate, apex acuminate. Petals are white, ovate, 1.5–1.7 cm, base shortly clawed, apex rounded. Stamens are 20, ca. 1/2 as long as petals. Ovary is 5- or 4-loculed, with 2 ovules per locule; styles are 5, rarely 4, nearly as long as stamens, glabrous. Fruit is a brownish pome, with pale dots, subglobose, 2–2.5 cm in diam., (4- or)5-loculed; sepals are caducous; fruiting pedicel 3.5–5.5 cm, subglabrous. [2]

Ecology and Distribution

Pyrus pyrifolia is naturally distributed is warm rainy regions of China, Laos, Vietnam at 100 - 1400 m altitude. [2]

Phenology and Reproduction

Pyrus pyrifolia flowers in April and fruits in August. [2] It propagates by seeds and cuttings.

Economic Value

Pyrus pyrifolia is economically valuable for food. Its ripen fruit is eaten fresh.

Phytochemistry and Pharmacology

Diseases and Pathogens

References

  1. Floridata. (2015). Pyrus pyrifolia. Retrieved from http://www.floridata.com/ref/p/Pyrus_pyrifolia.cfm on May 14, 2015.
  2. 2.0 2.1 2.2 Gu, C. Z. & Spongberg, S. A. (2003). PYRUS Linnaeus, Sp. Pl. 1: 479. 1753. 梨属 li shu. In Flora of China Editorial Committee (Eds.), Flora of China Volume 9 [PDF online], pp. 173 - 179. Retrieved from http://flora.huh.harvard.edu/china/PDF/PDF09/Pyrus.PDF