species information (Systematics, BiolFlor-Names, Status) |
BiolFlor-Name |
family |
german name(s) |
Dryas octopetala L. |
Rosaceae » |
Weiße Silberwurz
|
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) |
Dryas octopetala L. |
accepted |
>Dryas octopetala subsp. octopetala |
accepted |
|
Chromosome number » |
Basic chromosome number |
9 |
Chromosome number 2n |
18 |
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 |
Basic chromosome number |
9 |
Chromosome number 2n |
36 |
Chromosome number (Germany) |
False |
Most common chromosome race |
False |
Ploidy level |
4 (tetraploid) |
Ploidy type |
P (polyploid with haploid basic number) |
Reference |
Oberdorfer, E. 1983: Pflanzensoziologische Exkursionsflora. Ulmer, Stuttgart |
|
DNA content » |
DNA content (pg/2C) |
1.2 |
Chromosome number |
18 |
Quality |
chromosome number known and occurring in Germany [b] |
Authorised in BENNET & LEITCH 2001 |
True |
Reference |
Bennett, M.D., Leitch, I.J. 1995: Nuclear DNA amounts in angiosperms. Annals of Botany 76:113-176 |
|
Life form » |
Life form |
S (Hemiphanerophyte) |
Qualifier |
always [1] |
Life span » |
Life span |
p (pluriennial-pollakanthic) |
Qualifier |
always [1] |
Vegetative propagation » |
Vegetative propagation |
a (Runner) |
Qualifier |
always [1] |
Shoot metamorphoses » |
Shoot metamorphoses |
a (Runner) |
Qualifier |
always [1] |
Rosettes » |
Rosettes |
r (Erosulate plant) |
Qualifier |
always [1] |
special references:
|
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905
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Söyrinki, N. 1939: Studien ber die generative und vegetative Vermehrung der Samenpflanzen in der alpinen Vegetation Petsamo-Lapplands. Ann. Bot. Soc. "Vanamo" 14:1-404
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Gelting, P. 1934: Studies on the vascular plants of East Greenland between Franz Joseph Fjord and Dove Bay (Lat. 73o15'-76o20'N). Medd. om Groenl. 101:1-337
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Jessen, K. 1913: The structure and biology of arctic flowering plants II. 8. Rosaceae. Medd. om Groenl. 37:1-126
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Rauh, W. 1937: Beiträge zur Morphologie und Biologie der Holzgewächse. I. Entwicklungsgeschichte und Verzweigungsverhältnisse arktisch-alpiner Spaliersträucher. Nova Acta Leopold. N. F. 5:289-348
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Salisbury, E. 1952: Downs and dunes. Their plant life and its environment. Bells & Sons, London
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|
Flowering phenology » |
Begin of flowering (months) |
6 |
End of flowering (months) |
8 |
Duration of flowering (months) |
3 |
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 |
|
Type of reproduction » |
Type of reproduction |
sv (by seed and vegetatively) |
Reference |
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 |
Type of seed production » |
Type of seed production |
s (amphimictic, sexual) |
Reference |
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 |
Dicliny » |
Dicliny |
so (hermaphroditic) |
Abundance |
the rule [2] |
Reference |
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 |
Dicliny |
gm (gynomonoecious) |
Abundance |
rare [4] |
Reference |
Weber, H.E. 1995: Rosoideae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2A), S. 269-659, Blackwell Wissenschafts-Verlag, Berlin |
Dicliny |
gd (gynodioecious) |
Abundance |
rare [4] |
Reference |
Weber, H.E. 1995: Rosoideae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2A), S. 269-659, Blackwell Wissenschafts-Verlag, Berlin |
Dicliny |
am (andromonoecious) |
Abundance |
rare [4] |
Reference |
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 |
Dicliny |
ad (androdioecious) |
Abundance |
unknown [0] |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Dichogamy » |
Dichogamy |
g1 (slightly protogynous) |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Dichogamy |
h (homogamous) |
Reference |
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 |
Self-sterility and self-incompatibility » |
Self-sterility and self-incompatibility |
I+ (± self-incompatibel) |
Reference |
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 |
Systematic reference |
species [S] |
SI mechanism » |
SI mechanism |
GSI (gametophytic self-incompatibility) |
Reference |
de Nettancourt, D. 1977: Incompatibility in angiosperms. Springer, Berlin |
Pollen vector » |
Pollen vector |
in (insects) Pollen vector group: zo (Tierbestäubung) |
Abundance |
the rule [2] |
Reference |
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 |
Systematic reference |
species [S] |
Breeding system » |
Breeding system |
X (allogamous) |
Reference |
Anmerkung 2002: xenogam, da SI |
Floral rewards » |
Floral rewards |
1 (nectar) |
Reference |
Knuth, P. 1898: Handbuch der Blütenbiologie. Leipzig |
Amount of floral reward |
3 (present) |
Floral rewards |
1 (nectar) |
Reference |
Weber, H.E. 1995: Rosoideae. In: Hegi, G.B. (Hrsg.) Illustrierte Flora von Mitteleuropa, 4 (2A), S. 269-659, Blackwell Wissenschafts-Verlag, Berlin |
Amount of floral reward |
3 (present) |
Flower color » |
Flower colour |
white |
Basic flower colour |
w (white) |
Reference |
Schubert, R., Jäger, E.J., Werner, K. (Hrsg.) 1987: Exkursionsflora Band 3. Atlas der Gefäßpflanzen. 6. Aufl., Volk und Wissen, Berlin |
UV reflection of the flower » |
UV reflection in the periphery of the flower |
0 (unknown) |
UV reflection in the centre of the flower |
0 (unknown) |
UV reflection pattern |
0 (no UV reflectance patterns) |
Flower class after MUELLER » |
Flower class after MUELLER |
B (flowers with totally hidden nectar) Typical pollinators: bees, bumblebees, wasps, bombylides, syrphids |
Flower type after KUGLER » |
Flower type after KUGLER |
1.2ba (disk flowers with nectar ± hidden in centre of flower) |
|
Fruit type » |
Fruit type |
SaNu (aggregate nutlets) |
Diaspore type » |
Diaspore type |
Fch (fruitlet) |
Germinule type » |
Heteromorphic type |
n (not heteromorphic) |
Germinule type |
Fch (fruitlet) |
Information available |
True |
Development of nutritious appendages |
|
Development of flat appendages |
|
Development of elongated appendages |
always [1] |
Development of additional appendages |
|
Weights » |
Measured object |
Germinule |
Type of germinule or diaspore |
Fch (fruitlet) |
Constraint |
False |
Heteromorphic type |
n (not heteromorphic) |
Weight (minimum) [mg] |
|
Weight (mean) [mg] |
1.2 |
Weight (maximum) [mg] |
|
Measured object |
Diaspore |
Type of germinule or diaspore |
Fch (fruitlet) |
Constraint |
False |
Heteromorphic type |
n (not heteromorphic) |
Weight (minimum) [mg] |
|
Weight (mean) [mg] |
1.2 |
Weight (maximum) [mg] |
|
Sizes » |
Measured object |
Germinule |
Type of germinule or diaspore |
Fch (fruitlet) |
Constraint |
True |
Heteromorphic type |
n (not heteromorphic) |
Length (minimum) [mm] |
2.5 |
Length (mean) [mm] |
3.3 |
Length (maximum) [mm] |
4.1 |
Width (minimum) [mm] |
0.5 |
Width (mean) [mm] |
0.8 |
Width (maximum) [mm] |
1.0 |
Height (minimum) [mm] |
0.4 |
Height (mean) [mm] |
0.6 |
Height (maximum) [mm] |
0.8 |
special references:
|
Elkington, T.T. 1971: Biological Flora of the British Isles: Dryas octopetala L.. Journal of Ecology 59:887-905 (Gattung)
|
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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Brouwer, W., Stählin, A. 1955: Handbuch der Samenkunde. DLG-Verlag, Frankfurt/Main (Gattung)
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|
Habitat » |
Habitat |
T3.2.3 (null) Alliance: Elynion myosuroides
|
Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
|
Habitat |
T3.4.2.1 (null) Alliance: Seslerion variae
|
Occurrence questionable |
False |
Occurence restricted |
False |
Annotation |
|
|
Class » |
English circumscription |
04.3 (Communities of boulders and scree) Class: Thlaspietea rotundifolii
|
English circumscription |
05.7 (Alpine moor-grass communities) Class: Seslerietea albicantis
|
English circumscription |
05.9 (Arctic-alpine false sedge communities) Class: Carici rupestris-Kobrisietea bellardii
|
English circumscription |
10.7 (Snow-heather pine-forests) Class: Erico-Pinetea
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