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 Calyx 9-17 mm long, urnlike in shape (constricted upwards), with 5 prominent winged ridges with a cordlike marginal vein | |
3 Leaves 0.2-2 (-3) mm wide; stems diffusely and repeatedly branched near the base and upward | |
4 Annual; plants strict or few branched upward; petals 6-15 mm long | |