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Need help with identification? Try:
Plants of Washington Image Collection
| Scientific Name | Noxious Weed Class |
Phenology* |
Collector** |
Artemisia absinthium |
C |
7-10 |
|
| Centaurea solstitialis | B |
7-10 |
|
Centaurea stoebe |
B |
7-10 |
|
Centaurea × moncktonii |
B |
8-9 |
|
| Centaurea diffusa | B |
7-10 |
|
Centaurea nigra |
B |
5-10 |
|
Cirsium arvense |
C |
7-9 |
|
| Cirsium vulgare | C |
7-10 |
|
Clematis vitalba |
C |
7-10 |
|
| Conium maculatum | C |
4-10 |
|
Convolvulus arvensis |
C |
5-10 |
|
| Daphne laureola | Monitor |
1-5 |
|
| Egeria densa | B |
5-10 |
|
Geranium robertianum |
B |
4-8 |
|
Hedera helix |
C |
9-5 |
|
Hypericum perforatum |
C |
6-10 |
|
| Kochia scoparia | B |
9-12 |
|
| Lepidium latifolium | B |
5-9 |
|
Linaria dalmatica |
B |
5-9 |
|
Lythrum salicaria |
B |
7-9 |
|
Myriophyllum spicatum |
B |
8-10 |
|
Phalaris arundinacea |
C |
5-10 |
|
| Polygonum polystachyum | B |
8-10 |
|
Polygonum cuspidatum |
B |
8-9 |
|
Potentilla recta |
B |
6-8 |
|
Proboscidea louisianica |
Monitor |
8-10 |
|
Rorippa nasturtium-aquaticum |
Monitor |
4-9 |
|
Senecio jacobaea |
B |
7-10 |
|
Silybum marianum |
A |
6-10 |
|
| Solanum rostratum | A |
8-9 |
|
Tanacetum vulgare |
C |
7-9 |
|
Verbascum thapsus |
Monitor |
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