1	"Plants herbaceous, reproducing by spores, never producing flowers or cones"	2
1	"Plants herbaceous or woody, reproducing by seeds, seeds associated with bracts, cones, or flowers"	5
2	"Plants terrestrial, with erect, jointed, grooved stems and branches; leaves scale-like, whorled; spores produced in a terminal, herbaceous conelike strobilus (Equisetaceae, Equisetum"	"Equisetopsida {Equisetum ramosissimum}"
2	"Plants terrestrial or aquatic, if terrestrial, stems rounded or present only as underground rhizomes; spores produced on lower or upper leaf surfaces"	3
3	"Plants terrestrial; leaves scale-like, green, to 2 mm long; stems surficial, horizontal or to 30 cm tall (Selaginellaceae)"	"Lycopodiopsida {Selaginella}"
3	"Plants terrestrial or aquatic; leaves petiolate, blades at least 1 cm long and stems below the soil surface or whole plant floating and leaves scale-like, green to 3 mm long"	4
4	"Leaves simple, entire; sporangia on an elongated axis emanating from the base of the blade (Ophioglossaceae: Ophioglossum)"	"Psilotopsida {Ophioglossum polyphyllum}"
4	"Leaves lobed or more highly divided; sporangia on the lower surface of some or all leaves"	Polypodiopsida
5	"Plants herbaceous or woody, producing flowers;  seeds located in ovaries at the center of flowers"	6
5	"Plants woody, never producing flowers; seeds located on the top of bracts, these sometimes fleshy and tightly appressed to form a cone"	7
6	"Petals and sepals usually 4-5-merous; leaves usually with reticulate venation; plants herbaceous or woody; vascular bundles of stem forming a circle (needs cross-section and strong hand lens to view)"	Non-monocots
6	"Petals and sepals usually 3-merous; leaves usually with parallel venation; plants usually herbaceous; vascular bundles of stem scattered (need cross-section and strong hand lens to view)"	Liliopsida
7	"Plants trees or shrubs; male strobili of rounded scales, to 3 mm long; female strobili globose, fibrous to 6 mm in diameter; leaves on young shoots needle-like to 10 mm long, on older shoots scale-like and to 4 mm long (Cupresssaceae: Juniperus)"	"Pinopsida {Juniperus procera}"
7	"Plants shrubby; male and female strobili similar, of pairs of bracts subtending 3-4 anthers or (1-)2(-3) seeds (Ephedraceae: Ephedra)"	"Gnetopsida { Ephedra foliata}"