Ethnobotanical Leaflets Starch Research Page
SCHLEIDEN'S (1849) CLASSIFICATION OF STARCH-GRAINSI. Amorphous Starch.
II. Simple Grains. The majority of plants exhibit perfectly simple individual grains, among which doublets and triplets only occur as exceptions.
III. Compound Granules. Here we find a simple grain as an exception in the plant or part of the plant.
1. Roundish Bodies.
A. With the central cavity or hilum, apparently absent.
- 1. Quite small, almost spherical granules.
- 2. Large, irregular, knobby, often truncated multiangular grains.
B. With small roundish central cavities or hila.
(a) With a perceptible laminated formation.
- 3. Very large, rough grains, deformed as it were.
- 4. Ovoid granules.
- 5. Mussel-like granules.
- 6. Almost triangular.
(b) With an indistinct or deficient lamellated formation.
- 7. Rounded-off polyhedric grains.
- 8. Sharp-edged, polyhedric, very small grains.
(c) With an elongated central cavity.
- 9. Roundish or oval grains, in a dry condition, generally showing a star-like cleft in the inner layers.
(d) Perfectly hollow, apparently cup-like grains.
- 10. Very marked in the rhizome of Iris florentina and in kindred species.
2. Flatly compressed lenticular granules.
- 11. Sometimes with, sometimes without, a decided lamellated formation; sometimes with a central, or eccentric, or less rounded, or more elongated, or radiated torn-up cavity or hilum.
3. Perfectly flat discs.
- 12. With more distinct lamellae, in which it is, however, at times doubtful whether they pass entirely around or are only menisci laid over one another.
4. Elongated grains.
- 13. With an elongated central cavity in the milk-juice of the indigenous and a few of the tropical Euphorbiaceae.
5. Very irregular grains.
- 14. In the milky juice of many tropical Euphorbiaceae.
1. The separate grains in the compound grains without evident central cavity or hilum.
- 15. Compounded according to the simplest types in 2, 3, or 4.
- 16. Generally arranged regularly, seldom irregularly, and composed of from 2 to 6.
2. The separate grains in the compound grain having a distinct central cavity or hilum.
(a) All the parts of the grains of nearly the same size.
- 17. United according to simple types from 2 to 4. The central cavity or hilum small and roundish.
- 18. Combined according to simple types from 2 to 4. The central cavity or hilum large and very beautiful, opened in a star-like form.
- 19. Combined according to simple types from 2 to 4. The separate grains quite hollow, apparently cup-shaped.
- 20. Firmly combined, from 2 to 12 in number, in very irregular groups.
- 21. A large number, often as many as 30, of small roundish grains, very loosely grouped.
(b) Many smaller grains grown together upon one larger one.
- 22. In the pith of Sagua rumphii, etc., and generally in sago.
Southern Illinois University Carbondale / Ethnobotanical leaflets / EBL Starch Research Page / Schleiden
Last updated: 4-November-98 / du