1	"Generally shrub- or tree-like; leaves thick, generally rigid"	2
1	"Perennial herb, generally not shrub- or tree-like; leaves thin, flexible"	4
2	"Ovary inferior; perianth yellow to green-yellow"	Agave
2	"Ovary superior; perianth white or cream to +- green, purple-tinged or -tipped or not, or red-brown abaxially, +- white adaxially"	3
3	"Fruit erect, loculicidal; peduncle generally > 2.5 cm wide, bracts generally reflexed; stigma head-like"	"Hesperoyucca {Hesperoyucca whipplei}"
3	"Fruit erect or pendent, tardily septicidal or generally indehiscent; peduncle generally < 2 cm wide, bracts generally ascending; stigma 3-lobed"	Yucca
4	"Stem not evident above ground --- leaves, flowers tufted"	"Leucocrinum {Leucocrinum montanum}"
4	"Stem evident above ground"	5
5	"Inflorescence a panicle"	6
5	"Inflorescence a raceme"	7
6	"Style thread-like, deciduous; perianth twisted together above ovary in fruit"	Chlorogalum
6	"Style +- stout, persistent; perianth not twisted together above fruit"	Hastingsia
7	"Perianth parts < 1 cm, white (green-white) to +- yellow or +- purple"	Hastingsia
7	"Perianth parts 1.2--6 cm, white or blue to +- purple"	8
8	"Perianth parts blue to +- purple (white), fused < 5% of length; scapose; leaf margins not wavy"	Camassia
8	"Perianth parts white with silver-green midstripe especially abaxially, fused +- 25% of length; not scapose; leaf margins wavy"	"Hesperocallis {Hesperocallis undulata}"