Title: Applied and economic botany for students in technical and agricultural schools, pharmaceutical and medical colleges, for chemists, food analysts and for those engaged in the morphological and physiological study of plants
Identifier: appliedeconomic00krae (find matches)
Year: (c1916) ((c10s)
Authors: Kraemer, Henry, 1868-1924
Subjects: Botany; Botany, Economic; Botany, Medical
Publisher: New York, Wiley
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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468 A TEXT-BOOK OF BOTANY. A large number of the grasses are used in medicine, one of which, couch-grass (Agropyron repens), is official. Agropyron repens is a common perennial grass, forming slen- der jointed rhizomes, by means of which the plant is extensively propagated: the culms vary from one to four feet in height, the spikelets are 3- to 7-flowered ; and the empty glumes, 5- to 7-nerved, acute or with an awn-like apex. Hordeiim satimiin is an annual grass with the flowers in ter-
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J.O.»VA*'«' Fig. 25s. Wheat (Triticum): A, zigzag axis or rachis of ear showing the notches where the spikelets were inserted; B, an entire spikelet; C, a flower with the pales; D, a flower without the pales, showing the lodicules at the base; E, glume; F, outer pale; G, inner pale; H, fruit (caryopsis); I, longitudinal section of fruit.—After Warming. minal cylindrical spikes resembling wheat. The spikelets are ses- sile, i-flowered, and usually in clusters of three on opposite sides of the notched rachis. The empty glumes are long and narrow, forming a kind of involucre around the spikelet. It is supposed that Hordeum sativum is a cultivated form of H. spontaneum growing in the countries between Asia Minor and other parts of Western and Southwestern Asia. Three important varieties are distinguished, depending upon the number of rows of grains in

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