11. "Crepis nicaeensis " is an biennial herb up to 110 cm ( 44 inches ) tall. 12. "Crepis pannonica " is a perennial herb up to 130 cm ( 52 inches ) tall. 13. "Crepis pulchra " is an annual herb up to 100 cm ( 40 inches ) tall. 14. "Crepis rubra " is an annual herb up to 40 cm ( 16 inches ) tall. 15. Moreover, " Crepis " species contain the caffeoyl tartaric acid derivatives caffeoyl tartaric acid and cichoric acid. 16. "Crepis phoenix " is a perennial herb up to 70 cm tall, with a large taproot. 17. It is the most southerly known locality in Britain for Marsh Hawk s-beard ( " Crepis paludosa " ). 18. "Crepis capillaris " is a low, annual plant commonly found on roadsides, the stems often trailing along the ground but sometimes rosette. 19. "Crepis sibirica " is a perennial herb up to 150 cm ( 5 feet ) tall, spreading by means of large underground rhizomes. 20. The first monograph, published in 1937, resulted in splitting off the Asiatic " Crepis " species into the genus " Youngia ".