Elymus repens (root)
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=Introduction= | =Introduction= | ||
=Macroscopic Entries= | =Macroscopic Entries= | ||
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+ | {{Macroscopy | source=United States Dispensatory (1918) | ||
+ | | description=Couch Grass | ||
+ | is the dried rhizome, freed from remains of leaves and rootlets. | ||
+ | |||
+ | It is specifically characterized by its creeping | ||
+ | rootstock, the leaves being flat, thin and finely veined, and the | ||
+ | flowering glumes being glabrous or scabrous. | ||
+ | |||
+ | Usually in pieces from 4 to 12 mm. in length and from 1 to 2.5 mm. in diameter; | ||
+ | externally light yellow or yellowish-brown, longitudinally furrowed, | ||
+ | smooth, lustrous, nodes with circular leaf-scars, a few root-scars and | ||
+ | occasional slender roots; fracture tough, fibrous; internally lemon-yellow | ||
+ | and with a large, hollow pith; odor slight, aromatic; taste sweetish. Roots | ||
+ | filiform, irregularly branching, attaining a length of about 5 cm. and | ||
+ | not more than 0.5 mm. in thickness, light brown or yellowish-brown, | ||
+ | frequently covered with long root hairs. | ||
+ | |||
+ | Rhizome pale yellow, rigid, from two to two and a half millimetres in | ||
+ | diameter, usually in pieces from three to six millimetres long. Strongly | ||
+ | furrowed longitudinally, hollow except at the nodes. Contains no starch. | ||
+ | No odor; taste slightly sweet. | ||
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+ | }} | ||
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=Microscopic Entries= | =Microscopic Entries= | ||
+ | {{Macroscopy | source=United States Dispensatory (1918) | ||
+ | | description=Couch Grass: | ||
+ | Under the microscope, | ||
+ | transverse sections of Triticum show a single layer of strongly lignified | ||
+ | epidermal cells; a hypodermis of from 3 to 6 rows of more or less | ||
+ | polygonal cells with strongly lignified walls; a cortex of from 10 to 16 | ||
+ | rows of thin-walled parenchyma cells, occasionally with nearly spherical | ||
+ | starch grains about 0.005 mm. in diameter, or with irregular masses of a | ||
+ | more or less soluble carbohydrate; among the parenchyma cells and | ||
+ | near the hypodermis occur small, widely separated fibro-vascular | ||
+ | bundles, each with a closed sheath of sclerenchymatous fibers; an | ||
+ | endodermis, the lateral and inner walls of the cells moderately | ||
+ | thickened, strongly lignified and somewhat porous; several layers of | ||
+ | sclerenchymatous fibers immediately inside the endodermal ring, in | ||
+ | which are imbedded an interrupted circle of collateral fibro-vascular | ||
+ | bundles having large tracheas; adjoining these are usually 8 to 10 rows | ||
+ | of parenchyma cells with a few fibro-vascular bundles and a pith in | ||
+ | which the parenchyma cells are more or less broken or absent. The | ||
+ | powder is light yellowish; consisting of irregular, lignified fragments; | ||
+ | numerous fragments showing tracheae with annular or spiral | ||
+ | thickenings or marked with simple pores and associated with long, | ||
+ | narrow, rather thin-walled, strongly lignified sclerenchymatous fibers; | ||
+ | fragments of epidermis made up of cells rectangular in outline, the | ||
+ | longer walls considerably thickened, strongly lignified and marked with | ||
+ | numerous transverse pores; ends of epidermal cells usually separated | ||
+ | from each other by a very narrow cell with thin walls and few pores; | ||
+ | numerous fragments of parenchyma rectangular in outline and with | ||
+ | thin, porous walls. | ||
+ | }} | ||
{{Microscopy | source=Elan M. Sudberg, Alkemist Laboratories | {{Microscopy | source=Elan M. Sudberg, Alkemist Laboratories | ||
| companyimage= AP-LOGO-Laboratories Crop - Copy.jpg | | companyimage= AP-LOGO-Laboratories Crop - Copy.jpg |
Revision as of 17:12, 7 January 2014
Contents |
Introduction
Macroscopic Entries
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Microscopic Entries
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HPTLC Entries
Other Points of Interest
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