110 



C. J. HUMPHRIES 



Fig. 11 Approximate total range of Anacyclus. 



Artificial key to species, subspecies, varieties and hybrids 



1 . Capitula homomorphic, discoid 

 2. Cypselas with erose margins 



3. Central basal capitulum present; peduncles tumescent 



3. Central basal capitulum absent; peduncles unthickened 



2a. monanthos subsp. monanthos 

 (p. US) 



2b. monanthos subsp. 

 crytolepidioides (p. 118) 



2. Cypselas with entire margins 6. homogamos (p. 127) 



1. Capitula heteromorphic, outer florets ligulate, although sometimes shortly so, so that the capitula 



appear discoid 



4. Ligules inserted and hidden in the receptacular bracts 

 5. Short ligules white 



5. Short ligules yellow 



4. Ligules clearly visible and exerted from the receptacular bracts 



6. Ligules with a red stripe below 



7. Perennials with a distinct woody caudex 



8. Capitula 13-22 mm in diameter; old leaf-bases persistent 



xinconstans (p. 130) 

 xvalentinus (p. 131) 



8. Capitula 7-12 mm in diameter; old leaf-bases ephemeral 



3. mar ocean us (p. 119) 



la. pyrethrum var. 

 pyrethrum (p. 114) 

 1 b. pyrethrum var. 

 depressus (p. 114) 



7. Erect or decumbent annuals with simple roots 

 9. Cypsela wings distinctly crenate 

 9. Cypsela wings entire 

 10. Ligules yellow 

 10. Ligules white 



6. Ligules without a red stripe below 

 1 1 . Lower leaves tripinnatisect 



12. Involucral bracts broadly expanded and scarious at the apex; receptacular scales 

 obtuse 



13. Ligules yellow 4a. radiatus subsp. radiatus (p. 123) 



13. Ligules white 4b. radiatus subsp. coronatus (p. 124) 



12. Involucral bracts not expanded and only narrowly scarious at the apex; receptacular 



scales with spines 5. clavatus (p. 124) 



4u. radiatus subsp. radiatus (p. 123) 

 4b. radiatus subsp. coronatus (p. 124) 



