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Need help with identification? Try
Plants of Washington Image Collection
| Scientific Name | Noxious Weed Class |
Phenology* |
Collector** |
Abutilon theophrasti |
A |
7-11 |
|
Aegilops cylindrica |
C |
5-11 |
|
Alopecurus myosuroides |
B |
5-6 |
|
Anchusa arvensis |
B |
5-6 |
|
Anthriscus sylvestris |
B |
5-8 |
|
Carduus nutans |
B |
6-9 |
|
Carduus acanthoides |
B |
6-9 |
|
Centaurea repens |
B |
6-10 |
|
Centaurea × moncktonii |
B |
8-9 |
|
Centaurea jacea |
B |
8-9 |
|
Centaurea macrocephala |
A |
6-8 |
|
Centaurea stoebe |
B |
7-10 |
|
Centaurea solstitialis |
B |
7-10 |
|
Chaenorrhinum minus |
Monitor |
6-7 |
|
Cirsium vulgare |
C |
7-10 |
|
Cirsium arvense |
C |
7-9 |
|
Conium maculatum |
C |
4-10 |
|
Cynoglossum officinale |
B |
5-7 |
|
Cytisus scoparius |
B |
3-10 |
|
Euphorbia esula |
B |
5-7 |
|
Euphorbia myrsinites |
B |
5-9 |
|
Hieracium caespitosum |
B |
5-8 |
|
Hyoscyamus niger |
C |
7-8 |
|
Hypericum perforatum |
C |
6-10 |
|
Hypochaeris radicata |
B |
4-10 |
|
Kochia scoparia |
B |
9-12 |
|
Leucanthemum vulgare |
B |
5-9 |
|
Mirabilis nyctaginea |
A |
5-8 |
|
Myriophyllum spicatum |
B |
8-10 |
|
Nymphaea odorata |
C |
6-9 |
|
Nymphoides peltata |
B |
8-10 |
|
Onopordum acanthium |
B |
6-9 |
|
Potentilla argentea |
Monitor |
6-9 |
|
Sonchus arvensis |
B |
7-9 |
|
Tamarix ramosissima |
B |
5-6 |
|
Tanacetum vulgare |
C |
7-9 |
|
Tribulus terrestris |
B |
7-10 |
|
Tripleurospermum inodorum |
C |
5-10 |
* The numbers represent months of the year when the species has been collected, extracted from herbarium labels at WTU (with a few dates based on records at MO, NY, UC, and UBC).
On-line data sources for phenology:
MO: http://mobot.mobot.org/W3T/Search/vast.html
NY: http://sciweb.nybg.org/science2/vii2.asp
UBC: http://herbarium.botany.ubc.ca/herbarium_data/vascular/search.htm
UC: http://www.mip.berkeley.edu/www_apps/smasch/
WTU: http://biology.burke.washington.edu/herbarium/collections/vascular/basicsearch.php
** email wnps@wnps.org when you've made a collection and we will put your name onto the list, this will help us minimalize duplication of efforts. Use the email subject line: Herbarium Collection