Manihot esculenta (root)

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Latest revision as of 15:02, 26 May 2015

AHPA recognizes other valuable resources exist regarding the identity of Manihot esculenta.

To submit a suggestion or contribution, please contact Merle Zimmermann.

Contents

Nomenclature

Manihot esculenta Crantz   Euphorbiaceae  
Syn. Janipha manihot (L.) Kunth; Jatropha manihot L.  
Standardized common name (English): cassava

Botanical Voucher Specimen

bottomright bottomright bottomright

Manihot esculenta Tropicos 100000722 (S).jpg
Source: MOBOT, Tropicos.org[1]

Manihot esculenta Kew barcode=K000600386 225709.jpg
Source: Royal Botanic Gardens, Kew.[2]

Manihot esculenta Kew barcode=K000716450 553207.jpg
Source: Royal Botanic Gardens, Kew.[3]

Organoleptic Characteristics

Macroscopic Characteristics

Tapioca is in irregular, hard, white, rough grains, possessing little taste, partially soluble in cold water, and affording a fine blue color when iodine is added to its filtered solution. The partial solubility in cold water is owing to the rupture of the starch granules by heat.

Source: United States Dispensatory (1918) [4]

Microscopic Characteristics

Examined under the microscope, the granules appear somewhat plano-convex or bell-shaped and more or less compound. The individual grains vary from 0.006 to 0.030 mm. in diameter and have a distinct central circular or radiating cleft. They polarize light strongly, showing a distinct cross.

Source: United States Dispensatory (1918) [5]
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Manihot esculenta - Alkemist Laboratories.jpg
Starch granules of various sizes from 5-30 µm in diameter rounded and sub spherical observed with an irregularly stellate cleft at 400x with Acidified Chloral Hydrate Glycerol Solution.
Source: Elan M. Sudberg, Alkemist Laboratories[6]

Manihot esculenta-1 - Alkemist Laboratories.jpg
Starch granules of various sizes from 5-30 µm in diameter rounded and sub spherical seen under polarized light showing a linear hilum at 400x with Acidified Chloral Hydrate Glycerol Solution.
Source: Elan M. Sudberg, Alkemist Laboratories[7]

High Performance Thin Layer Chromatographic Identification

Supplementary Information

Sources

  1. ↑ MOBOT, Tropicos.org http://www.tropicos.org/Image/100000722
  2. ↑ Royal Botanic Gardens, Kew. http://specimens.kew.org/herbarium/K000600386
  3. ↑ Royal Botanic Gardens, Kew. http://specimens.kew.org/herbarium/K000716450
  4. ↑ United States Dispensatory (1918)
  5. ↑ United States Dispensatory (1918)
  6. ↑ Elan M. Sudberg, Alkemist Laboratories http://www.alkemist.com
  7. ↑ Elan M. Sudberg, Alkemist Laboratories http://www.alkemist.com
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