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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

Whitman County (43 taxa)

Scientific Name
Noxious Weed Class
Phenology*
Collector**

Adonis annua

Monitor
5-6
 

Adonis aestivalis

Monitor
6
 

Anchusa officinalis

B
5-10
 

Anthriscus sylvestris

B
5-8
 

Cardaria pubescens

C
5-8
 

Carduus acanthoides

B
6-9
 

Carduus nutans

B
6-9
 

Carduus pycnocephalus

A
5-6
 

Cenchrus longispinus

B
7-10
 

Centaurea diffusa

B
7-10
 

Centaurea macrocephala

A
6-8
 

Centaurea jacea

B
8-9
 

Centaurea nigra

B
5-10
 

Centaurea × moncktonii

B
8-9
 

Chaenorrhinum minus

Monitor
6-7
 

Cirsium vulgare

C
7-10
 

Conium maculatum

C
4-10
 

Echium vulgare

B
7-10
 

Halogeton glomeratus

Monitor
7-9
 

Hieracium aurantiacum

B
5-9
 
Hieracium caespitosum
B
5-8
 

Hyoscyamus niger

C
7-8
 

Hypericum perforatum

C
6-10
 

Hypochaeris radicata

B
4-10
 

Lepyrodiclis holosteoides

B
5-6
 

Leucanthemum vulgare

B
5-9
 

Linaria vulgaris

C
6-8
 

Linaria dalmatica

B
5-9
 

Lythrum salicaria

B
7-9
 

Myriophyllum spicatum

B
8-10
 

Phragmites australis subsp. australis

C
8-10
 

Polygonum ×bohemicum

B
8-9
 

Potentilla recta

B
6-8
 

Rorippa sylvestris

Monitor
7-8
 

Rorippa austriaca

B
5-6
 

Senecio jacobaea

B
7-10
 

Silybum marianum

A
6-10
 

Solanum rostratum

A
8-9
 

Solanum elaeagnifolium

A
5-10
 

Sorghum halepense

A
10
 

Tamarix ramosissima

B
5-6
 
Verbascum thapsus
Monitor
5-10
 

Zygophyllum fabago

A
8-9
 

* 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