HOME

About WNPS
Administration
Calendar
Contact WNPS
History
Donate
Membership
Online Store

Activities
Conservation
Ecosystems
Education
Landscaping
Native Plant Lists
Publications
Research
Restoration

Local Chapters
Field Trips
Programs
Plant Sales
Volunteer

Photo Gallery

Priorities
Garry Oak
Invasive Species
Shrub-Steppe

Programs
Growing Wild
Ivy OUT
WNPS Stewards

An Affiliate of

Earthshare of Washington

Home > Invasive Species

Collections Needed

Need help with identification?  Try:

Google Image Search

Plants of Washington Image Collection

Skamania County (32 taxa)

Scientific Name

Noxious

Weed Class

Phenology*
Collector**

Abutilon theophrasti

A
7-11
 

Anchusa arvensis

B
5-6
 

Anchusa officinalis

B
5-10
 

Anthriscus sylvestris

B
5-8
 

Artemisia absinthium

C
7-10
 

Cardaria draba

C
5-6
 

Centaurea jacea

B
8-9
 

Centaurea stoebe

B
7-10
 

Centaurea solstitialis

B
7-10
 

Centaurea × moncktonii

B
8-9
Peter Zika, Richard Halse

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
 

Cuscuta approximata

C
7-9
 

Cynoglossum officinale

B
5-7
 

Geranium robertianum

B
4-8
 

Gypsophila paniculata

C
6-9
 

Hieracium caespitosum

B
5-8
 

Hieracium aurantiacum

B
5-9
 

Linaria dalmatica

B
5-9
 

Lythrum salicaria

B
7-9
 

Myriophyllum aquaticum

B
7-10
 

Onopordum acanthium

B
6-9
 

Picris hieracioides

B
7-9
Peter Zika, K.A. Beck w/F. Caplow, B. Newhouse

Polygonum sachalinense

B
7-10
 

Potentilla recta

B
6-8
 

Rorippa nasturtium-aquaticum

Monitor
4-9
 

Tamarix ramosissima

B
5-6
 

Torilis arvensis

B
5-9
 

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