Pyrus

Definitions

  • WordNet 3.6
    • n Pyrus fruit trees native to the Old World: pears
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Webster's Revised Unabridged Dictionary
    • n Pyrus (Bot) A genus of rosaceous trees and shrubs having pomes for fruit. It includes the apple, crab apple, pear, chokeberry, sorb, and mountain ash.
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Century Dictionary and Cyclopedia
    • n pyrus A genus of rosaceous trees and shrubs, including the apple and pear, the type of the tribe Pomeæ, which takes its name from the pome, the characteristic fruit of this genus. It is characterized by an urn-shaped superior calyx, of which the limb is deciduous or persistent, and by an ovary of from two to five mostly two-ovuled cells, which in fruit are two- or one-seeded, separated, cartilaginous-walled, and immediately invested by a fleshy expansion of the disk, the whole being surrounded by the thickened calyx. There are about 50 species, natives of northern temperate regionsand extending into the mountains of India. They bear alternate petioled and usually toothed leaves, deciduous stipules, and numerous cymes of snowy-white or pink flowers, each with five roundish petals and numerous stamens, terminating short spur-like branches. The numerous sections are strikingly different in habit, and several were long received as distinct genera. The typical section Pyrophorum (De Candolle, 1825) includes the pear and the wild pear or choke-pear and allied species. (See pear.) The section Malus (Tournefort, 1700), the apple, distinguished by a fruit hollowed in at the base, includes P. Malus, for which see apple, apple-tree, and crab. To the section Aria (De Candolle, 1825), having only two or three styles and ovate leaves whitened beneath, belongs P. Aria, the beam-tree, with several varieties, including P. intermedia, the Swedish beam-tree. To the section Torminaria (De Candolle, 1825). with pinnately lobed leaves and somewhat obconical fruit, belongs P. torminalis, the wild service-tree (see service-tree). In the section Sorbus (Tournefort, 1700), with compound cymes and pinnate leaves, are included P. domestica (formerly Sorbus domestica), for which see service-tree; P. Americana and P. aucuparia, for which see mountain-ash. Another section, Adenorhachis (De Candolle, 1825), with berry-like fruit, but undivided leaves and glandular petioles, includes P. arbutifolia, for which see chokeberry, and cut under inflorescence. To the section Cydonia (Tournefort, 1700) belong the quinces. (See Cydonia and quince.) The genus Mespilus was also made by Bentham and Hooker a section of Pyrus. See Mespilus and medlar. Also Pirus.
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Chambers's Twentieth Century Dictionary
    • n Pyrus pī′rus a genus of trees and shrubs of the natural order Rosaceæ, sub-order Pomeæ.
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Etymology

Webster's Revised Unabridged Dictionary
L. pyrus, or better pirus, pear tree
Chambers's Twentieth Century Dictionary
L. pyrus, for pirus, a pear-tree.

Usage

In literature:

Along the watercourses Pyrus, Betula, Corylifoliae, and Eurya.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
Pyrus Malus, P. Aria and P. aucuparia, and P. torminalis .
"Handbook to the Severn Valley Railway Illustrative and Descriptive of Places along the Line from Worcester to Shrewsbury" by J. Randall
Down the driveway the yellow forsythias, the red pyrus japonicas showed in blurs of colours.
"The Long Roll" by Mary Johnston
The remaining sections of Pyrus merely require an occasional thinning.
"Trees and Shrubs for English Gardens" by Ernest Thomas Cook
Pyrus communis L. Rose family.
"Texas Honey Plants" by C. E. Sanborn
Pome usually of 5 carpels; each becomes incompletely 2-celled by a projection from its back; otherwise as Pyrus.
"The Manual of the Botany of the Northern United States" by Asa Gray
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In news:

The apples are grafted on to malis domestica, and the pears on to pyrus calleryana.
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