species information (Systematics, BiolFlor-Names, Status) |
BiolFlor-Name |
family |
german name(s) |
Crepis tectorum L. |
Asteraceae » |
Dach-Pippau
|
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) |
Crepis tectorum L. |
accepted |
Crepis tectorum var. segetalis Roth |
Synonym |
|
Chromosome number » |
Basic chromosome number |
4 |
Chromosome number 2n |
8 |
Chromosome number (Germany) |
True |
Most common chromosome race |
False |
Ploidy level |
2 (diploid) |
Ploidy type |
D (diploid with haploid basic number) |
Reference |
Oberdorfer, E. 1983: Pflanzensoziologische Exkursionsflora. Ulmer, Stuttgart |
|
DNA content » |
DNA content (pg/2C) |
6.8 |
Chromosome number |
8 |
Quality |
chromosome number known and occurring in Germany [b] |
Authorised in BENNET & LEITCH 2001 |
True |
Reference |
Bennett, M.D., Smith, J.S. 1976: Nuclear DNA amounts in angiosperms. Philosophical Transactions of the Royal Society London B 274:227-274 |
|
Life form » |
Life form |
H (Hemicryptophyte) |
Qualifier |
always [1] |
Life form |
T (Therophyte) |
Qualifier |
always [1] |
Life span » |
Life span |
a (annual) |
Qualifier |
always [1] |
Rosettes » |
Rosettes |
h (Hemirosette plant) |
Qualifier |
always [1] |
special references:
|
Najda, H.G., Darwent, A.L., Hamilton, G. 1982: The biology of Canadian weeds. 54. Crepis tectorum L.. Canadian Journal of Plant Science 62:473-481
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Perttula, U. 1941: Untersuchungen über die generative und vegetative Vermehrung der Blütenpflanzen in der Wald-Hainwiesen- und Hainfelsen-Vegetation. Ann. Acad. Sci. Fennici, Ser. A, 58:1-388
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Flowering phenology » |
Begin of flowering (months) |
5 |
End of flowering (months) |
10 |
Duration of flowering (months) |
6 |
Number of flowering phases |
0 |
Symphenological Groups » |
Phenological group |
7 (Ligustrum-Stachys sylvatica-Phase) Phenological season: end of early summer |
Reference |
Dierschke, H 1995: Phänologische und symphänologische Artengruppen von Blütenpflanzen in Mitteleuropa. Tuexenia 15: 523-560 |
|
Type of reproduction » |
Type of reproduction |
s (by seed/by spore) |
Reference |
Najda, H.G., Darwent, A.L., Hamilton, G. 1982: The biology of Canadian weeds. 54. Crepis tectorum L.. Canadian Journal of Plant Science 62:473-481 |
Type of seed production » |
Type of seed production |
s (amphimictic, sexual) |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Dicliny » |
Dicliny |
so (hermaphroditic) |
Abundance |
always [1] |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Dichogamy » |
Dichogamy |
a2 (protandrous) |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Self-sterility and self-incompatibility » |
Self-sterility and self-incompatibility |
SC (self-compatibel) |
Reference |
Andersson, S. 1989: The evolution of self-sterility in Crepis tectorum. Plant Systematics and Evolution 168:227-236 |
Systematic reference |
species [S] |
Self-sterility and self-incompatibility |
SI (self-incompatibel) |
Reference |
Andersson, S. 1989: The evolution of self-sterility in Crepis tectorum. Plant Systematics and Evolution 168:227-236 |
Systematic reference |
species [S] |
SI mechanism » |
SI mechanism |
SSI (sporophytic self-incompatibility) |
Reference |
de Nettancourt, D. 1977: Incompatibility in angiosperms. Springer, Berlin |
Pollen vector » |
Pollen vector |
se (selfing) Pollen vector group: se (Selbstbestäubung) |
Abundance |
the rule [2] |
Reference |
Andersson, S. 1996: Floral reduction in Crepis tectorum (Asteraceae): Tradeoffs and dominance relationships. Biological Journal of the Linnean Society 57:59-68 |
Systematic reference |
species [S] |
Pollen vector |
ge (geitonogamy) Pollen vector group: se (Selbstbestäubung) |
Abundance |
at failure of outcrossing [7] |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Systematic reference |
species [S] |
Pollen vector |
in (insects) Pollen vector group: zo (Tierbestäubung) |
Abundance |
the rule [2] |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Systematic reference |
species [S] |
Breeding system » |
Breeding system |
AFXF (mixed mating) |
Reference |
Andersson, S. 1989: The evolution of self-sterility in Crepis tectorum. Plant Systematics and Evolution 168:227-236 |
Floral rewards » |
Floral rewards |
1 (nectar) |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Amount of floral reward |
3 (present) |
Flower color » |
Flower colour |
light yellow |
Basic flower colour |
g (yellow) |
Reference |
Schubert, R., Jäger, E.J., Werner, K. (Hrsg.) 1987: Exkursionsflora Band 3. Atlas der Gefäßpflanzen. 6. Aufl., Volk und Wissen, Berlin |
Flower class after MUELLER » |
Flower class after MUELLER |
B` (flower associations with totally hidden nectar) Typical pollinators: bees, bumble bees, wasps, bombylides, syrphids |
Flower type after KUGLER » |
Flower type after KUGLER |
7.2b (flower heads, Asteraceae, only ray flowers) |
|
Fruit type » |
Fruit type |
Nu (nut) |
Diaspore type » |
Diaspore type |
FZb (fruit with appendage) |
Germinule type » |
Heteromorphic type |
n (not heteromorphic) |
Germinule type |
F (fruit) |
Information available |
True |
Development of nutritious appendages |
|
Development of flat appendages |
|
Development of elongated appendages |
sometimes [2] |
Development of additional appendages |
|
Heteromorphic type |
n (not heteromorphic) |
Germinule type |
FZb (fruit with appendage) |
Information available |
True |
Development of nutritious appendages |
|
Development of flat appendages |
|
Development of elongated appendages |
always [1] |
Development of additional appendages |
|
Sizes » |
Measured object |
Germinule |
Type of germinule or diaspore |
F (fruit) |
Constraint |
False |
Heteromorphic type |
n (not heteromorphic) |
Length (minimum) [mm] |
2.5 |
Length (mean) [mm] |
3.3 |
Length (maximum) [mm] |
5.0 |
Width (minimum) [mm] |
0.5 |
Width (mean) [mm] |
0.6 |
Width (maximum) [mm] |
0.7 |
Height (minimum) [mm] |
0.5 |
Height (mean) [mm] |
0.6 |
Height (maximum) [mm] |
0.7 |
special references:
|
Grime, J.P., Hodgson, J.G., Hunt, R. 1988: Comparative Plant Ecology. Unwin Hyman, London (Gattung)
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Beijerink, W. 1947: Zadenatlas der Nederlandsche Flora. Biol. Stat. Wijster, Wageningen (Gattung)
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Brouwer, W., Stählin, A. 1955: Handbuch der Samenkunde. DLG-Verlag, Frankfurt/Main (Gattung)
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Hanf, M. 1984: Ackerunkräuter Europas mit ihren Keimlingen und Samen. . BLV Verlagsgesellschaft, München, Wien, Zürich. (Gattung)
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Vogler, P. 1901: Ueber die Verbreitungsmittel der schweizerischen Alpenpflanzen. Flora 89 (Ergänzungsband zum Jg.1901):1-137 (Gattung)
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Heinisch, O. 1955: Samenatlas der wichtigsten Futterpflanzen und ihrer Unkräuter. Deutsche Akad. Landwirtsch.-Wiss., Berlin (Gattung)
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Babcook, E.B. 1947: The genus Crepis. University of California Press, Berkeley, Los Angeles (Gattung)
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Habitat » |
Habitat |
T10.3.3.1 (null) Alliance: ???
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
T8.3.1 (null) Alliance: Sisymbrion
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Habitat |
T9.1.1.3 (null) Alliance: Polygono-Chenopodion polyspermi
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Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
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Class » |
English circumscription |
06.4 (Annual ruderal communities) Class: Sisymbrietea officinalis
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English circumscription |
06.6 (Chickweed and other field weed communities) Class: Stellarietea mediae
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