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Key for the Cryptocoryne crispatula group |
| Key for the 'crispatula group' according to Jacobsen (1991). |
| 1. |
Limb rarely exceeding 2.5 cm, more or less
recurved (to spirally twisted, with a short appendage). Opening of the limb of the spathe
usually distinctly dilatated. Markings on the limb irregular, line-like to circular,
brownish (to reddish). Leaves green to brown, 10 - 30 cm long, smooth. neither
undulate nor denticulate at the margin
.......... C. albida |
| 1. |
Limb usually more than 3 cm, more or less
regularly spirally
twisted. Opening of the limb of the spathe usually not dilatated. Markings on the limb
more or less circular, large red spots, or, more or less regular line-like and purple.
Leaves 10 -70 cm long, smooth to undulate to bullate or with a denticulate margin ..........2 |
| 2. |
Limb more or less open-spirally twisted,
sometimes uncoiled. Markings on the limb irregular, line-like (to circular), purple.
Leaves green to brown, smooth to undulate to bullate, 10 - 70 cm long
.......... C. crispatula |
| 2. |
Limb of the spathe usually more or less spirally
twisted. Markings on
the limb large, more or less circular, reddish. Leaves green to brownish,
smooth to undulate, 10 - 40 cm long .......... C.
retrospiralis |
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| Key for the var's in C. crispatula by Zhou & al. (2010) after Li & Jacobsen (2010) |
| 1a. |
Plants with short, rather stiff, upright emergent
leaves (10 - 30 × 0.6 - 2 cm), submerged leaves
short, terete, 2 -10 cm. |
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2a. |
Spathe with a short, thick limb
spiral, with distant to dense
red spots .......... var. yunnanensis |
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2b. |
Spathe usually with a long,
thin / narrow limb spiral, with
regular to irregular shorter or
longer purplish to reddish lines
(or rare, limb pure white) .......... var. crispatula |
| 1b. |
Plants with long, flaccid-lax submerged
leaves (20 - 70 × 0.2 - 4 cm). |
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3a. |
Leaves 0.2 - 0.4 cm wide .......... var. tonkinensis |
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3b. |
Leaves 0.5 - 4.5 cm wide. |
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4a. |
Leaves 0.5 -1.2 cm wide,
smooth to undulate .......... var. flaccidifolia |
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4b. |
Leaves 1.5 - 4.5 cm wide, smooth to undulate to more or less bullate |
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5a. |
Leaves 1.5 - 4.5 cm wide, smooth to slightly undulate along the leafmargin, spatha pure white ..........var. planifolia |
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5b. |
Leaves 1.5 - 4.5 cm wide, more or less bullate, limb of the spathe with purple markings.......... var. balansae |
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Literature:
- Jacobsen, N., 1991. Die schmallblättrigen Cryptocorynen des asiatischen Festlandes.
Aqua-Planta 1-91 : 2-33.
- Li, H. & N. Jacobsen, 2010. Cryptocoryne in the Flora of China, Vol. 23: 20-22.
- Zhou, H., H.W. He & N. Jacobsen, 2010. Eine neue Varietät der Cryptocoryne crispatula Engler (Araceae) aus der Provinz Guangxi, China. Aqua Planta 35(4): 134-138.
(all three articles can be downloaded from the Document service)
Jan D.Bastmeijer, update June 2012
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