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Earthshare of Washington

Home > Invasive Species

Collections Needed

Need help with identification?  Try:

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Plants of Washington Image Collection

Grant County (36 taxa)

Scientific Name
Noxious Weed Class
Phenology*
Collector**
Abutilon theophrasti
A
7-11
 

Aegilops cylindrica

C
5-11
 

Artemisia absinthium

C
7-10
 

Cardaria draba

C
5-6
 

Carduus nutans

B
6-9
 

Cenchrus longispinus

B
7-10
Stina Freitas

Centaurea stoebe

B
7-10
 

Centaurea solstitialis

B
7-10
 

Chondrilla juncea

B
7-10
David Giblin

Cirsium vulgare

C
7-10
 

Cirsium arvense

C
7-9
R. Richardson, Joy Mastrogiuseppe w/Kali Robsen, Donna Wilcox, Darrell Pock

Convolvulus arvensis

C
5-10
 

Cuscuta approximata

C
7-9
 

Cyperus esculentus

B
8-10
 

Daucus carota

B
5-10
David Gross

Euphorbia esula

B
5-7
R.E. Brainerd, E. Hunn

Euphorbia myrsinites

B
5-9
Pam Camp

Gypsophila paniculata

C
6-9
 

Hypericum perforatum

C
6-10
David Giblin w/Ben Legler, A. Kelly w/Olivia J. Messinger

Iris pseudacorus

C
5-10
Ben Legler w/David Giblin

Kochia scoparia

B
9-12
David Giblin

Lepidium latifolium

B
5-9
David Giblin, David Giblin w/Ben Legler, Ben Legler, Frederica Bowcutt

Leucanthemum vulgare

B
5-9
John Luginbuhl, Doug Williams

Myriophyllum spicatum 

B
8-10
 

Onopordum acanthium

B
6-9
 

Polygonum cuspidatum 

B
8-9
 

Potentilla recta

B
6-8
 

Rorippa nasturtium-aquaticum

Monitor
4-9
David Giblin

Senecio vulgaris

C
3-12
Ben Legler w/Peter Zika, David Giblin

Silene latifolia subsp. alba

C
4-8
 

Solanum rostratum

A
8-9
 

Sorghum halepense

A
10
 

Tamarix ramosissima

B
5-6
 

Tribulus terrestris

B
7-10
Tamara Cowles w/Daniel Mason, Shay Hohmann; David Giblin

Tripleurospermum inodorum

C
5-10
 

Xanthium spinosum

C
7-9
 

* 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