1	"Perianth parts +- free; onion odor present; inflorescence 3--many-flowered, flowers rarely partly or completely replaced by bulblets"	Allium
1	"Perianth parts fused in lower 1/3 or 1/2; onion odor present or 0; inflorescence 1--several-flowered, flowers not replaced by bulblets"	2
2	"Onion odor present; inflorescence 1-flowered; perianth parts fused in lower 1/2"	"Ipheion {Ipheion uniflorum}"
2	"Onion odor 0; inflorescence several-flowered; perianth parts fused in lower 1/3"	"Nothoscordum {Nothoscordum gracile}"