About WNPS
Home
Annual Report
ByLaws
Calendar
Committees
Contact WNPS
Directors
Goals
History
How to Donate
Membership
Policies
Activities
Conservation
Ecosystems
Education
Landscaping
Native Plant Lists
Publications
Research
Restoration
Local Chapters
Field Trips
Programs
Plant Sales
Priorities
Garry Oak
Invasive Species
Shrub-Steppe
Programs
Growing Wild
Ivy OUT
WNPS Stewards
An Affiliate of
Earthshare of Washington
Need help with identification? Try:
Plants of Washington Image Collection
| Scientific Name | Noxious Weed Class |
Phenology* |
Collector** |
Abutilon theophrasti |
A |
7-11 |
|
Anthriscus sylvestris |
B |
5-8 |
|
Buddleja davidii |
C |
7-10 |
|
Cardaria draba |
C |
5-6 |
|
Carduus nutans |
B |
6-9 |
|
Centaurea diffusa |
B |
7-10 |
|
Centaurea × moncktonii |
B |
8-9 |
|
Centaurea stoebe |
B |
7-10 |
|
Chondrilla juncea |
B |
7-10 |
|
Clematis vitalba |
C |
7-10 |
|
Convolvulus arvensis |
C |
5-10 |
|
Cyperus esculentus |
B |
8-10 |
|
Daucus carota |
B |
5-10 |
|
Echium vulgare |
B |
7-10 |
|
Egeria densa |
B |
5-10 |
|
Hemizonia pungens |
C |
8-10 |
|
Heracleum mantegazzianum |
A |
6-7 |
|
Hieracium sabaudum |
B |
9 |
|
Hieracium aurantiacum |
B |
5-9 |
|
Hieracium caespitosum |
B |
5-8 |
|
Hieracium pilosella |
B |
5-6 |
|
Hypericum perforatum |
C |
6-10 |
|
Impatiens glandulifera |
B |
7-10 |
|
Iris pseudacorus |
C |
5-10 |
|
Kochia scoparia |
B |
9-12 |
|
Lepidium latifolium |
B |
5-9 |
|
Linaria vulgaris |
C |
6-8 |
|
Lythrum salicaria |
B |
7-9 |
|
Myriophyllum spicatum |
B |
8-10 |
|
Myriophyllum aquaticum |
B |
7-10 |
|
Phalaris arundinacea |
C |
5-10 |
|
Polygonum baldschuanicum |
Monitor |
5-10 |
|
Polygonum cuspidatum |
B |
8-9 |
|
Polygonum sachalinense |
B |
7-10 |
|
Potentilla recta |
B |
6-8 |
|
Proboscidea louisianica |
Monitor |
8-10 |
|
Senecio jacobaea |
B |
7-10 |
|
Solanum rostratum |
A |
8-9 |
|
Sonchus arvensis |
B |
7-9 |
|
Spartium junceum |
A |
6-11 |
|
Tanacetum vulgare |
C |
7-9 |
|
Ulex europaeus |
B |
4-9 |
|
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