1	"Annual generally < 10 cm; roots fine, fibrous; leaves narrow, generally inrolled, generally < 1 mm wide"	"Juncus Group 1"
1	"Perennial herb; plant generally larger in all respects; roots coarse or rhizomes present; leaves narrow or wide, inrolled to flat or cylindric"	2
2	"Inflorescence bract cylindric, resembling continuation of stem; inflorescence appearing lateral"	"Juncus Group 2"
2	"Inflorescence bract not cylindric, not resembling continuation of stem, or if so then channeled along inner side; inflorescence appearing terminal"	3
3	"Leaf blade generally cylindric or nearly so; crosswalls generally complete"	"Juncus Group 3"
3	"Leaf blade flat or wiry; crosswalls incomplete or 0"	4
4	"Leaf blade iris-like, flattened, oriented with edge toward stem (at least from middle to tip), crosswalls generally incomplete"	"Juncus Group 4"
4	"Leaf blade wiry or grass-like, if flattened then oriented with flat side toward stem, crosswalls 0"	5
5	"2 bractlets subtending flower; leaves slender, generally < 1.3 mm wide, generally wiry or channeled; flowers 1 or in clusters"	"Juncus Group 5"
5	"1 bractlet subtending flower; leaves broader, generally 2--7 mm wide, flat; flowers in clusters"	"Juncus Group 6"