Washington Native Plant Society: Invasive Species

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Chelan County (26 taxa)

Scientific Name	Noxious Weed Class	Phenology*	Collector**
Aegilops cylindrica	C	5-11
Alhagi maurorum	B	8-9
Cardaria draba	C	5-6
Carduus nutans	B	6-9
Cenchrus longispinus	B	7-10
Centaurea solstitialis	B	7-10
Centaurea × moncktonii	B
Chondrilla juncea	B	7-10
Cynoglossum officinale	B	5-7
Cytisus scoparius	B	3-10
Hieracium aurantiacum	B	5-9
Hyoscyamus niger	C	7-8
Hypochaeris radicata	B	4-10
Iris pseudacorus	C	5-10
Kochia scoparia	B	9-12
Lepidium latifolium	B	5-9
Linaria vulgaris	C	6-8
Lythrum salicaria	B	7-9
Mirabilis nyctaginea	A	5-8
Myriophyllum spicatum	B	8-10
Polygonum cuspidatum	B	8-9
Polygonum sachalinense	B	7-10
Potentilla argentea	Monitor
Potentilla recta	B	6-8
Silene latifolia subsp. alba	C	4-8
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