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2 Inflorescence 3-6 dm long, often broader than long, the main axis absent or to 15 cm long; main lateral veins of the leaflets running all the way to the teeth; petiolules 0-1 (-6) mm long; dry fruit 3.0-3.5 mm long; corolla white to off-white; leaves 2-pinnate, basal pair of pinnae subtended by pair of accessory leaflets; drupes 4-4.5 mm in diameter; [exotic spreading southward from ne. United States] | |
2 Inflorescence 4-12 dm long, usually longer than broad, with a well-developed central axis 30-40 cm long; main lateral veins of the leaflets branching repeatedly and getting smaller before reaching the marginal teeth as small branching veinlets; petiolules 1-7 mm long; dry fruit 4.0-5.0 mm long; corolla creamy or buttery yellow; leaves 2-3-pinnate, basal pair of pinnae usually subtended by pair of accessory pinnae with 3--5 leaflets, sometimes by pair of accessory leaflets; drupes 5-8 mm in diameter; [widespread native] | |
1 Plant an acaulescent herb or stout, suffruticose herb or slightly woody shrub, not at all to somewhat woody at the base; stem unarmed (or in A. hispida bristly with thin prickles on the lower stem only); leaves unarmed. | |
3 Plant an acaulescent herb, the solitary leaf and scapose inflorescence arising from a subterranean rhizome; inflorescence a raceme of (2-) 3 (-7) umbels; [section Nanae] | |
3 Plant a caulescent herb, the leaves several and alternate, the inflorescence terminal on the leafy stem; inflorescence a raceme or panicle of (2-) 5-many umbels. | |
4 Stem bristly toward its base; inflorescence a raceme or weak panicle of (2-) 5-25 umbels; [section Dimorphanthus] | |