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Home > Invasive Species

Collections Needed

Need help with identification?  Try:

Google Image Search

Plants of Washington Image Collection

Jefferson County (12 taxa)

Scientific Name
Noxious Weed Class
Phenology*
Collector**

Berteroa incana

B
6-10
 

Centaurea × moncktonii

B
8-9
 

Cirsium vulgare

C
7-10
 

Cytisus scoparius

B
3-10
 

Heracleum mantegazzianum

A
6-7
 

Hypochaeris radicata

B
4-10
 

Iris pseudacorus

C
5-10
Peter Zika w/Fred Weinmann

Linaria dalmatica

B
5-9
 

Lythrum salicaria

B
7-9
 

Polygonum cuspidatum 

B
8-9
 

Senecio jacobaea

B
7-10
 

Silene latifolia subsp. alba

C
4-8
Fred Weinmann

* 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