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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 |
|
Anthriscus sylvestris |
B |
5-8 |
|
Artemisia absinthium |
C |
7-10 |
|
| Cardaria draba | C |
5-6 |
|
Centaurea jacea |
B |
8-9 |
|
Centaurea macrocephala |
A |
6-8 |
|
Centaurea stoebe |
B |
7-10 |
|
| Centaurea diffusa | B |
7-10 |
|
Centaurea × moncktonii |
B |
8-9 |
|
Clematis vitalba |
C |
7-10 |
|
Convolvulus arvensis |
C |
5-10 |
|
Cuscuta approximata |
C |
7-9 |
|
Cyperus esculentus |
B |
8-10 |
|
Egeria densa |
B |
5-10 |
|
Gypsophila paniculata |
C |
6-9 |
|
Hedera helix |
C |
9-5 |
|
Heracleum mantegazzianum |
A |
6-7 |
|
Hieracium ×floribundum |
A |
6-8 |
|
Hieracium caespitosum |
B |
5-8 |
|
Hieracium aurantiacum |
B |
5-9 |
|
Hyoscyamus niger |
C |
7-8 |
|
Impatiens glandulifera |
B |
7-10 |
|
Kochia scoparia |
B |
9-12 |
|
Linaria vulgaris |
C |
6-8 |
|
Linaria dalmatica |
B |
5-9 |
|
| Lysimachia vulgaris | B |
8-9 |
|
Lythrum salicaria |
B |
7-9 |
|
Myriophyllum aquaticum |
B |
7-10 |
|
Myriophyllum spicatum |
B |
8-10 |
|
Polygonum baldschuanicum |
Monitor |
5-10 |
|
Polygonum polystachyum |
B |
8-10 |
|
Polygonum cuspidatum |
B |
8-9 |
|
Polygonum sachalinense |
B |
7-10 |
|
Potentilla recta |
B |
6-8 |
|
Proboscidea louisianica |
Monitor |
8-10 |
|
Rorippa sylvestris |
Monitor |
7-8 |
|
Rorippa nasturtium-aquaticum |
Monitor |
4-9 |
|
Senecio jacobaea |
B |
7-10 |
|
Solanum rostratum |
A |
8-9 |
|
Sonchus arvensis |
B |
7-9 |
|
Spartina anglica |
B |
7-9 |
|
Spartina alterniflora |
B |
9 |
|
Torilis arvensis |
B |
5-9 |
|
Tripleurospermum inodorum |
C |
5-10 |
|
Ulex europaeus |
B |
4-9 |
* 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