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Earthshare of Washington

Home > Invasive Species

Need help with identification? Try:

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Plants of Washington Image Collection

Yakima County (35 taxa)

Scientific Name
Noxious Weed Class
Phenology*
Collector

Abutilon theophrasti

A
7-11
 

Aegilops cylindrica

C
5-11
 

Amorpha fruticosa

B
5-8
 

Carduus nutans

B
6-9
 

Centaurea × moncktonii

B
8-9
 

Centaurea stoebe

B
7-10
 

Centaurea tricocephala

Monitor
7
 

Chondrilla juncea

B
7-10
 

Clematis vitalba

C
7-10
 

Cuscuta approximata

C
7-9
 

Cynoglossum officinale

B
5-7
 

Cytisus scoparius

B
3-10
 

Daucus carota

B
5-10
 

Eruca vesicaria

Monitor
3-6
 

Gypsophila paniculata

C
6-9
 

Helianthus ciliaris

A
6-7
 

Hibiscus trionum

Monitor
9-10
 

Hypochaeris radicata

B
4-10
 

Lepidium latifolium

B
5-9
 

Leucanthemum vulgare

B
5-9
 

Linaria vulgaris

C
6-8
 

Lythrum salicaria

B
7-9
 

Myriophyllum aquaticum

B
7-10
 

Onopordum acanthium

B
6-9
 

Polygonum cuspidatum 

B
8-9
 

Potentilla recta

B
6-8
 

Secale cereale

C
5-8
 

Senecio jacobaea

B
7-10
 

Silene latifolia subsp. alba

C
4-8
 

Solanum rostratum

A
8-9
 

Sorghum halepense

A
10
 

Sphaerophysa salsula

B
5-6
 

Tamarix ramosissima

B
5-6
 

Xanthium spinosum

C
7-9
 

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