Search The Directory The Web for Home > Science > Biology > Flora and Fauna > Plantae > Magnoliophyta > Magnoliopsida > Asteraceae > Centaurea New! Submit a site   Categories: Centaurea solstitialis (9)       whatUseek Collection Sites (submit a site ):   Give your site great placement in this category in as little as two business days!     whatUseek Directory Site Listings:   CalFlora: Centaurea calcitrapa - Common names: red or purple starthistle. Photographs and description, distribution map for California, classification as invasive species and noxious weed.   Centaurea tauromenitana - Image of plant, close-up of flower head.   Knapweed - Photographs, descriptions and distribution information for spotted knapweed (Centaurea maculosa), brown knapweed (Centaurea jacea) and Russian knapweed (Centaurea repens). From the Ontario Ministry of Agriculture and Food.   Plant Profile for Centaurea calcitrapa - Detailed plant classification, national distribution maps, status as invasive plant and noxious weed. From the USDA PLANTS data base.   Purple Starthistle Identification - Identifying photographs for Centaurea calcitrapa. From King County, Washington, Department of Natural Resources. Help build the largest human-edited directory on the web.   Submit a Site - Open Directory Project - Become an Editor

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