Washington Native Plant Society: Invasive Species

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Clallam County (32 taxa)

Scientific Name	Noxious Weed Class	Phenology*	Collector**
Anthriscus sylvestris	B	5-8
Cardaria draba	C	5-6
Centaurea × moncktonii	B	8-9
Centaurea jacea	B	8-9
Centaurea repens	B	6-10
Centaurea macrocephala	A	6-8
Centaurea stoebe	B	7-10
Clematis vitalba	C	7-10
Conium maculatum	C	4-10
Convolvulus arvensis	C	5-10
Echium vulgare	B	7-10
Egeria densa	B	5-10
Geranium robertianum	B	4-8
Gypsophila paniculata	C	6-9
Hedera helix	C	9-5
Heracleum mantegazzianum	A	6-7
Impatiens glandulifera	B	7-10
Iris pseudacorus	C	5-10
Linaria vulgaris	C	6-8
Linaria dalmatica	B	5-9
Lythrum salicaria	B	7-9
Myriophyllum aquaticum	B	7-10
Myriophyllum spicatum	B	8-10
Onopordum acanthium	B	6-9
Phalaris arundinacea	C	5-10
Potentilla recta	B	6-8
Salvia pratensis	A	6-7
Salvia sclarea	A	7-10
Solanum rostratum	A	8-9
Spartina alterniflora	B	9
Spartium junceum	A	6-11
Tamarix ramosissima	B	5-6

* 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