. The botany of crop plants; a text and reference book. Botany, Economic. SOLANACE^ 573 4. External medulla. 5. Internal medulla. According to Coudon and Boussard, these zones (except- ing vascular ring) are proportioned (by volume) as follows: Skin (average of two varieties) Cortex (average of two varieties) External medulla (average of five varieties). Internal medulla (average of five varieties).. Per cunt. 36 . I Q 34-17 U 95. -periderm outer cortex ^^A^ i-iSS Fig. 237.— Microscopic section through the "skin" and portion of cortex of potato (Solanum tuberosum). For considera
. The botany of crop plants; a text and reference book. Botany, Economic. SOLANACE^ 573 4. External medulla. 5. Internal medulla. According to Coudon and Boussard, these zones (except- ing vascular ring) are proportioned (by volume) as follows: Skin (average of two varieties) Cortex (average of two varieties) External medulla (average of five varieties). Internal medulla (average of five varieties).. Per cunt. 36 . I Q 34-17 U 95. -periderm outer cortex ^^A^ i-iSS Fig. 237.— Microscopic section through the "skin" and portion of cortex of potato (Solanum tuberosum). For consideration here, these zones are classified as fol- lows : 1. Periderm or skin. 2. Vascular ring. 3. Parenchyma. ia) Cortex. 1. External. 2. Internal. (6) Medulla. 1. External. 2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Robbins, Wilfred William, 1884-1952. Philadelphia, P. Blakiston's Son & Co
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