Flora of the Southeastern United States
2022 Edition

Colors

Data mode

Account

Login
Sign up

Key to Sonchus

Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

1 Heads 30-50 mm across in flower, the involucre (10-) 15-20 mm high; perennials from creeping rhizomes.
..2 Phyllaries and peduncles densely pubescent with glandular hairs; longer phyllaries 14-17 mm long
..2 Phyllaries and peduncles glabrous (but with sessile glands); longer phyllaries 10-15 mm long
1 Heads 15-25 mm across in flower, the involucre 9-13 mm high; annuals.
....3 Leaf base auricles rounded; mature achenes not transversely rugose
....3 Leaf base auricles sagittate, the two lobes on either side of the stem coming to a point; mature achenes transversely rugose