1	"Stamens > in number than corolla lobes"	2
1	"Stamens = in number to corolla lobes or fewer"	5
2	"Leaf compound --- petals proximally free but strongly adherent and may appear fused"	"Fabaceae Group 3"
2	"Leaf simple, sometimes reduced to linear or scale-like bracts"	3
3	"Filaments fused, forming a U-shaped tube around the style --- petals actually free but may appear fused"	"Polygalaceae {Polygala}"
3	"Filaments free"	4
4	"Shrub; leaves alternate; anthers dehiscing by pores; ovules many; fruit a capsule"	"Ericaceae {Rhododendron macrophyllum}"
4	"Herb or weak-stemmed subshrub; leaves opposite; anthers dehiscing by lateral slits; ovule 1; fruit an achene tightly enwrapped by hardened base of corolla-like calyx --- petals actually 0 but sepals petal-like and involucre bracts sepal-like"	"Nyctaginaceae {Allionia}"
5	"Corolla scarious, persistent in fruit"	"Plantaginaceae {Plantago}"
5	"Corolla not scarious, generally deciduous after flower"	6
6	"Fertile stamens = in number to corolla lobes"	7
6	"Fertile stamens fewer than corolla lobes --- 1 or more sterile stamens sometimes present"	12
7	"Ovary deeply 4-lobed, especially in fruit; style attachment surrounded by lobes of ovary (style readily detaches in Lamiaceae as corolla falls); fruit breaking apart into 1-seeded nutlets (sometimes only 1--3 nutlets maturing)"	8
7	"Ovary entire or shallowly lobed; style clearly attached to tip of ovary; fruit a capsule or splitting into nutlets"	9
8	"Stem round in ×-section; leaves alternate (proximal opposite in some _Plagiobothrys_); herbage not aromatic; inflorescence or inflorescence branches coiled when young, unrolling in flower or fruit"	Boraginaceae
8	"Stem 4-angled, at least when young; leaves opposite throughout; herbage generally strongly aromatic, especially if crushed; inflorescence or inflorescence branches not coiled"	Lamiaceae
9	"Shrub; filaments attached directly to receptacle, falling free from corolla or only weakly adhering; anthers dehiscent by pores"	Ericaceae
9	"Herb; filaments fused to and falling with corolla; anthers dehiscent by slits"	10
10	"Calyx lobes bordered by or +- fused by a much thinner, transparent or translucent membrane; corolla generally funnel-shaped to salverform; stigmas 3; ovary chambers 3"	Polemoniaceae
10	"Calyx lobes not bordered by or fused by transparent or translucent membrane; corolla +- rotate; stigmas 1--2; ovary chambers 1--4"	11
11	"Corolla white to blue or purple, 2--8 mm diam; inflorescence cyme-like, or flowers solitary; fruit splitting into generally 4 one-seeded nutlets"	"Boraginaceae {Tiquilia}"
11	"Corolla yellow (white to +- purple), 15--40 mm diam; inflorescence a narrow raceme or panicle; fruit a many-seeded capsule"	"Scrophulariaceae {Verbascum}"
12	"Plant entirely non-green, +- fleshy"	Orobanchaceae
12	"Plant green and photosynthetic"	13
13	"Proximal portion of lower corolla lip with backward-projecting, conic or tubular spur"	14
13	"Proximal portion of lower corolla lip without backward-projecting, conic or tubular spur, occasionally with expanded pouch"	16
14	"Plant aquatic; leaf-like underwater stems generally dissected, generally submersed, generally bearing small, hollow bladders that suck in and trap small organisms when hairs at opening are triggered"	"Lentibulariaceae {Utricularia}"
14	"Plant terrestrial; leaves entire to shallowly lobed, without hollow bladders"	15
15	"Leaves all basal; adaxial leaf face sticky or slimy with insect-capturing glands"	"Lentibulariaceae {Pinguicula}"
15	"Leaves basal and cauline or all cauline; adaxial leaf surface not sticky or slimy with insect-capturing glands"	Plantaginaceae
16	"Ovary generally deeply 4-lobed; style attachment surrounded by lobes of ovary [style readily detaches as corolla falls] --- fruit breaking into 4 one-seeded nutlets"	Lamiaceae
16	"Ovary entire or +- shallowly lobed; style arising from tip of ovary"	17
17	"Ovules 1--4 per ovary chamber"	18
17	"Ovules several to many per ovary chamber"	21
18	"Fruit a capsule"	19
18	"Fruit 2--4 nutlets"	20
19	Shrub	Acanthaceae
19	Annual	Plantaginaceae
20	"Stamens exserted"	Lamiaceae
20	"Stamens included"	Verbenaceae
21	"Leaves compound"	Bignoniaceae
21	"Leaves simple"	22
22	"Capsule 5--35 cm"	23
22	"Capsule < 2 cm"	24
23	"Shrub or tree; capsule body 15--35 cm, straight, linear"	Bignoniaceae
23	"Annual; capsule body 5--10 cm, curved, tipped with a hooked beak several cm long"	"Martyniaceae {Proboscidea}"
24	"Corolla upper lip forming a concave beak or hood, +- enclosing or covering stamens and style"	25
24	"Corolla upper lip not forming a beak or hood, not enclosing or covering stamens and style [though these may be included within corolla tube or throat]"	26
25	"Sterile stamen 0; lobes of upper corolla lip obscure or 0"	Orobanchaceae
25	"Sterile stamen present, inserted on corolla tube between lobes of upper corolla lip; lobes of upper lip evident"	Plantaginaceae
26	"Stigma lobes flat, disk-like, moving together when touched; cauline leaves opposite"	"Phrymaceae {Mimulus}"
26	"Stigma dot-like or head-like, unlobed, or lobes not moving together when touched; cauline leaves opposite or alternate (whorled) or leaves all basal"	27
27	"Leaves all basal"	28
27	"Leaves basal and cauline or all cauline"	29
28	"Flowers solitary; stamens 4; leaves linear or awl-like to spoon-shaped or ovate, entire"	"Scrophulariaceae {Limosella}"
28	"Flowers in raceme; stamens 2; leaves ovate to round, toothed or shallowly lobed"	"Plantaginaceae {Synthyris}"
29	"Stem 4-angled; corolla tube urn-shaped to spheric"	"Scrophulariaceae {Scrophularia}"
29	"Stem generally round in &times;-section; corolla tube cylindric to bell-shaped, sometimes very short"	Plantaginaceae