species information (Systematics, BiolFlor-Names, Status) |
BiolFlor-Name |
family |
german name(s) |
Crassula helmsii (Kirk) Cockayne |
Crassulaceae » |
Nadelkraut
|
reference |
Kühn, I., Klotz, S. 2002: Systematik, Taxonomie und Nomenklatur. In: Klotz, S., Kühn, I., Durka, W. (Hrsg.): BIOLFLOR - Eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland. Schriftenreihe für Vegetationskunde. Bonn »
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Synonymy (taxonomy after Wisskirchen & Haeupler, 1998) |
Crassula helmsii (Kirk) Cockayne |
accepted |
Bulliarda recurva Hook. f. |
Synonym |
Crassula recurva (Hook. f.) Ostenf., non N. E. Br., nom. illeg. |
Synonym |
Tillaea helmsii Kirk |
Synonym |
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Chromosome number » |
Basic chromosome number |
7 |
Chromosome number 2n |
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Chromosome number (Germany) |
False |
Most common chromosome race |
False |
Ploidy level |
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Ploidy type |
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Reference |
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Flowering phenology » |
Begin of flowering (months) |
8 |
End of flowering (months) |
9 |
Duration of flowering (months) |
2 |
Number of flowering phases |
0 |
Symphenological Groups » |
Phenological group |
0 (not available) Phenological season: not available |
Reference |
Dierschke, H 1995: Phänologische und symphänologische Artengruppen von Blütenpflanzen in Mitteleuropa. Tuexenia 15: 523-560 |
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Type of reproduction » |
Type of reproduction |
vvs (mostly vegetatively, rarely by seed) |
Reference |
Lippert, W. 1995: Crassulaceae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2a), S. 69-129, Blackwell, Berlin |
Type of seed production » |
Type of seed production |
s (amphimictic, sexual) |
Reference |
Anmerkung 2002: Sexuelle Samenproduktion, da keine Apomikten in Gattung bekannt |
Dicliny » |
Dicliny |
so (hermaphroditic) |
Abundance |
always [1] |
Reference |
Lippert, W. 1995: Crassulaceae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2a), S. 69-129, Blackwell, Berlin |
Dichogamy » |
Dichogamy |
h (homogamous) |
Reference |
Lippert, W. 1995: Crassulaceae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2a), S. 69-129, Blackwell, Berlin |
Self-sterility and self-incompatibility » |
Self-sterility and self-incompatibility |
SC (self-compatibel) |
Reference |
East, E.M. 1940: The distribution of self-sterility in the flowering plants. Proceedings of the American Philosophical Society 82:449-518 |
Systematic reference |
genus [G] |
Pollen vector » |
Pollen vector |
se (selfing) Pollen vector group: se (Selbstbestäubung) |
Abundance |
the rule [2] |
Reference |
Lippert, W. 1995: Crassulaceae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2a), S. 69-129, Blackwell, Berlin |
Systematic reference |
species [S] |
Breeding system » |
Breeding system |
AO (autogamous) |
Reference |
Lippert, W. 1995: Crassulaceae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2a), S. 69-129, Blackwell, Berlin |
Flower color » |
Flower colour |
white to pinkish |
Basic flower colour |
w (white) |
Reference |
Haeupler, H., Muer, T. 2000: Bildatlas der Farn- und Blütenpflanzen Deutschlands. Ulmer, Stuttgart |
Flower class after MUELLER » |
Flower class after MUELLER |
AB (flowers with partly hidden nectar) Typical pollinators: syrphids, bees |
Flower type after KUGLER » |
Flower type after KUGLER |
1.2bd (disk flowers with nectar ± hidden nectaries at or in ovary) |
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Fruit type » |
Fruit type |
SaBa (aggregate follicles) |
Diaspore type » |
Diaspore type |
S (seed) |
Germinule type » |
Heteromorphic type |
n (not heteromorphic) |
Germinule type |
S (seed) |
Information available |
True |
Development of nutritious appendages |
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Development of flat appendages |
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Development of elongated appendages |
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Development of additional appendages |
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Sizes » |
Measured object |
Germinule |
Type of germinule or diaspore |
S (seed) |
Constraint |
False |
Heteromorphic type |
n (not heteromorphic) |
Length (minimum) [mm] |
0.4 |
Length (mean) [mm] |
0.4 |
Length (maximum) [mm] |
0.5 |
Width (minimum) [mm] |
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Width (mean) [mm] |
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Width (maximum) [mm] |
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Height (minimum) [mm] |
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Height (mean) [mm] |
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Height (maximum) [mm] |
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Measured object |
Diaspore |
Type of germinule or diaspore |
S (seed) |
Constraint |
False |
Heteromorphic type |
n (not heteromorphic) |
Length (minimum) [mm] |
0.4 |
Length (mean) [mm] |
0.4 |
Length (maximum) [mm] |
0.5 |
Width (minimum) [mm] |
|
Width (mean) [mm] |
|
Width (maximum) [mm] |
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Height (minimum) [mm] |
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Height (mean) [mm] |
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Height (maximum) [mm] |
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special references:
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Anderberg, A.L. 1994: Atlas of seeds and small fruits of Northwest-European plant species with morphological descriptions. - Part 4 (Resedaceae - Umbelliferae). Swedish Museum of Natural History, Stockholm (Gattung)
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Beijerink, W. 1947: Zadenatlas der Nederlandsche Flora. Biol. Stat. Wijster, Wageningen (Gattung)
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Knapp, U. 1994: Skulptur der Samenschale und Gliederung der Crassulaceae. Botanische Jahrbücher für Systematik 116:157-187 (Gattung)
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Laundon, J.R. 1961: An Australasian species of Crassula introduced into Britain. Watsonia 5:59-63 (Gattung)
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Habitat » |
Habitat |
L3.1.4 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.2.4 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.3.4 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.4.4 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.5.4 (null) Alliance: ???
|
Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.6.4 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.7.4 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.8.4 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
L3.9.4 (null) Alliance: Potamogetonetea
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Class » |
English circumscription |
01.2 (Communities of aquatic plants rooting in the bed) Class: Potamogetonetea pectinati
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