ASTERAC 



Heads on a scape 

 I [eads "ii a leafy stem 

 ( 1 ) Pappus branches united by hairs 

 ippus brani hes aot so tin 



(a) Pappus capillary 

 \. Achenes flattened 



'. henes liluiu 

 (y) Achenes beaked 

 v. Achenes cj lindric or angled 

 (x) Flowers yellow or orange 

 in. Pappus brown »r brownish 

 n. Pappus white 

 (y) Flowers white or cream-colored 



(b) Pappus of blunt scales; flowers blue 





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Cynara — Artichoke, < ardoon 



(Gr. kinara, 



1. Leaves woolly below; head smooth 



2. Leaves smooth; heads prickly 



1. Heads less than 3 cm. 



Carduus— Thistle 



<I.at. carduus, thistle) 





2. Heads more than 3 cm. 



a. Lower surface of leaf brown hairy 



b. Lower surface of leaf densely white woolly 



(1) Leaves usually lobed or dentate 



(2) Leaves typically pinnatilid 



(a) Leaves white woolly above 



(b) Leaves green above 







• 



Carthamus — Safflower, False Saffron 



(Ar. qartama, paint, because of tl 

 Leaves oblong-ovate; flowers orange 



Arctium Bur ' 



(Gr. arktion, a plant, from arktos. 

 A biennial weed with large ox air leaves 



Laciniaria- Blazing 



(Lat. laclnla, •■ 



1. Bracts pointed 



a. 1 [eads 1 . ; 60 flowered 



(1) Tips of bracts rig ing 



(2) Tips closely appressed 



b. 1 leads 3 6 flowered 



(1) Heads , rowded in a long 



(2) lb-ads loose in a shorl 



2. Bracts obtuse, not pointed 



a. Heads in 25 mm., 1 ; 45 M ■■• 



b. Heads -1 8 mm., S 1 ; flowi 



Ammobiui 



(Gr, amnios. ' I, bl *• 



Leaves lanceolate, cottony, extern ing 





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