1	"Plant under 3 cm high; capitula sessile at base of plant"	"Crepis pusilla"
1	"Plant (at anthesis) at least 10 cm high; capitula pedunculate"	2
2	"Cypselas 1.5–2.5 mm long, tapered apically but not distinctly beaked; pappus not overtopping involucral bracts; involucral bracts glabrous on inner surface; receptacle glabrous"	"Crepis capillaris"
2	"Cypselas 4–13 mm long, at least the inner ones distinctly beaked; pappus overtopping involucral bracts in fruit; involucral bracts with fine appressed hairs on inner surface; receptacle with low ciliate ridges between attachments of cypselas"	3
3	"Peduncles and involucral bracts with stiff, pale, spreading, eglandular bristles 1–2 mm long"	"Crepis setosa"
3	"Peduncles and involucral bracts with fine pale appressed hairs, with or without spreading, usually dark, glandular hairs to c. 1.5 mm long"	4
4	"Plant foetid; buds nodding; inner cypselas beaked, outer cypselas not or hardly beaked, embraced by the inner involucral bracts"	"Crepis foetida"
4	"Plant not foetid; buds erect; cypselas all beaked, the outer ones not embraced by inner involucral bracts"	"Crepis vesicaria"