201. 
Cynareae 
1. Involucre not spiny; flowers blue, the marginal 
ones) Gesembilkiing, raySeyeieihepeyerevelaeleleje dieeeneys oe «s)e sjeleleisi e's GeNntauned 
1. Involucre spiny; flowers pink or red-violet, all 
alike. 
2. Leaves not spiny, the lower ones cordate; 
phyllaries spiny, with hooked tips.......+..+++e+e+e-- Arctium 
2. Leaves spiny, narrow at base; phyllaries spiny, with 
SER ao Ee Gap sierstarereia aloneyetererolensrereloneteiier sic clehsceiapers vishe) eroleieie Cites UUM 
Centaurea 
Centaurea cyanus L. Cornflower, 
Bachelor's Button 
Ivy Neck. One station: tractor trail to abandoned field on 
Scaffold Peninsula. Hectare 4740. Associate species: Anagallis 
arvensis, Galinsoga ciliata, Pyrrhopappus carolinianus, Taraxacum 
officinale, Rumex crispus. Higman 808. 
Arctium 
Arctium minus (Hill.) Bernh. Common Burdock 
(A. minus Schk.) 
Java Farm. One station: rubbish pile at main building area. 
Hectare 2580. Associate species: Eleusine indica, Datura stramoniun, 
Solanum nigrum, Amaranthus spinosus, Phytolacca americana. Higman 6. 
Cirsium 
1. Flowers perfect. 
2. Upper half of stem and branches with long, 
prickly wings decurrent from the leaves............ C. vulgare 
2. Upper half of stem and branches not long-winged. 
3. Leaves green beneath. Expected (C. muticum). 
3, Leaves with dense white felt beneath. 
