1	"Perianths having both a calyx and a corolla; corollas united, at least at the base"	2
1	"Perianths sometimes lacking petals; corollas usually with free petals, these occasionally united at the base"	13
2	"Ovaries inferior"	3
2	"Ovaries superior"	5
3	"Inflorescences consisting an involucre of green bracts surrounding few to many flowers, these often of two okinds, the outer bilaterally symmetric and often showy, the inner radially symmetric and usually not showy; stamens 5, united by their anthers"	Asteraceae
3	"Inflorescences varying, but not with an involucre of green bracts surrounding  numerous sessile flowers; stamens not united by their anthers"	4
4	"Leaves alternate; plants climbing or trailing, usually with tendrils, without spines; flowers, and often plants, unisexual; stamens 5"	Cucurbitaceae
4	"Leaves opposite or whorled; plants sometimes climbing, without tendrils but often spiny; flowers usually bisexual, rarely unisexual; stamens 4 or 5"	Rubiaceae
5	"Leaves compound, pinnately or digitately; stamens 2 or 4"	6
5	"Leaves simple, entire or lobed; stamens 2, 3, 4, or 5"	7
6	"Corollas 5-lobed, usually bilaterally symmetric; ovaries with numerous, often winged, seeds; stamens 2 or 4"	Bignoniaceae
6	"Corollas 4-lobed, usually radially symmetric; ovaries 2-celled, with 2 ovules per cell; seeds not winged; stamens 2"	Oleaceae
7	"Stamens 2 or 4, an additional staminode present in some species"	8
7	"Stamens 5 or 3"	10
8	"Styles 2-fid"	Lamiaceae
8	"Styles with funnel-shaped or 2-lobed stigmas"	9
9	"Young stems strongly 4-angled; fruits of 2-4 nutlets or drupes, these sometimes more or less dry; plants usually glandular and aromatic"	Verbenaceae
9	"Young stems terete; fruits loculicdal, often explosive capsules; plants rarely glandular and fragrant"	Acanthaceae
10	"Anthers connivent around the stigmatic head, coherent with it, or fused to it and forming a gynostegium; fruits often united by the stigmatic head, their lower portions free; corollas often with a corona; seeds often with a tuft of hairs"	Apocynaceae
10	"Anthers not connivent with each other nor with the gynoecium; druits drupes, nutlets, berries, or nuts"	11
11	"Plants frequently twining or prostrate, rarely trees, sometimes twining parasites with reduced leaves; fruits usually capsules"	Convolvulaceae
11	"Plants usually neither twining nor prostrate, sometimes trees, not parasitic; fruits nutlets, drupes, capsules. Or berries"	12
12	"Plants usually with simple, stiff hairs; ovaries entire or deeply 4-lobed, developing 1-4 seeds"	Boraginaceae
12	"Plants with simple, branched, or stellate hairs, these not stiff; ovaries entire, developing many seeds"	Solanaceae
13	"Plants trees or shrubs, often with peeling or flaking translucent outer bark, usually secreting resin or oil; leaves  pinnately complound, sometimes with only 1-3 leaflets, occasionally simple; flowers small, often unisexual; stamens 4, 8, or 10 in staminate or bisexual flowers; ovaries with 2-6(8)cells"	Burseraceae
13	"Plants not as above in all respects"	14
14	"Corollas present, usually united for for at least 1/4 their length"	15
14	"Corollas sometimes absent, if present, the petals not united or occasionally united at the base"	26
15	"Ovaries inferior"	16
15	"Ovaries superior"	18
16	"Inflorescences consisting an involucre of green bracts surrounding few to many flowers, these often of two okinds, the outer bilaterally symmetric and often showy, the inner radially symmetric and usually not showy; stamens 5, united by their anthers"	Asteraceae
16	"Inflorescences varying, but not with an involucre of green bracts surrounding  numerous sessile flowers; stamens not united by their anthers"	17
17	"Leaves alternate; plants climbing or trailing, usually with tendrils, without spines; flowers, and often plants, unisexual; stamens 5"	Cucurbitaceae
17	"Leaves opposite or whorled; plants sometimes climbing, without tendrils but often spiny; flowers usually bisexual, rarely unisexual; stamens 4 or 5"	Rubiaceae
18	"Leaves compound, pinnately or digitately; stamens 2 or 4"	19
18	"Leaves simple, entire or lobed; stamens 2, 3, 4, or 5"	20
19	"Corollas 5-lobed, usually bilaterally symmetric; ovaries with numerous, often winged, seeds; stamens 2 or 4"	Bignoniaceae
19	"Corollas 4-lobed, usually radially symmetric; ovaries 2-celled, with 2 ovules per cell; seeds not winged; stamens 2"	Oleaceae
20	"Stamens 2 or 4, an additional staminode present in some species"	21
20	"Stamens 5 or 3"	23
21	"Styles 2-fid"	Lamiaceae
21	"Styles with funnel-shaped or 2-lobed stigmas"	22
22	"Young stems strongly 4-angled; fruits of 2-4 nutlets or drupes, these sometimes more or less dry; plants usually glandular and aromatic"	Verbenaceae
22	"Young stems terete; fruits loculicdal, often explosive capsules; plants rarely glandular and fragrant"	Acanthaceae
23	"Anthers connivent around the stigmatic head, coherent with it, or fused to it and forming a gynostegium; fruits often united by the stigmatic head, their lower portions free; corollas often with a corona; seeds often with a tuft of hairs"	Apocynaceae
23	"Anthers not connivent with each other nor with the gynoecium; druits drupes, nutlets, berries, or nuts"	24
24	"Plants frequently twining or prostrate, rarely trees, sometimes twining parasites with reduced leaves; fruits usually capsules"	Convolvulaceae
24	"Plants usually neither twining nor prostrate, sometimes trees, not parasitic; fruits nutlets, drupes, capsules. Or berries"	25
25	"Plants usually with simple, stiff hairs; ovaries entire or deeply 4-lobed, developing 1-4 seeds"	Boraginaceae
25	"Plants with simple, branched, or stellate hairs, these not stiff; ovaries entire, developing many seeds"	Solanaceae
26	"Plants with spiny, succulent stems and/or branches, with or without a woody trunk; leaves, if present, inconspicuous and soon deciduous"	27
26	"Plants stems and branches usually not both spiny and succulent; leaves usually conspicuous and persisting at least through the flowering season"	28
27	"Plants with milky latex; spines all alike not retrorsely barbed; a  genus with many native species"	Euphorbiaceae
27	"Plants without a milky latex; spines usually of two two kinds, clusters of small, retrorsely barbed, short spines (glochids) usually surrounding fewer, longer, smooth spines, long spines sometimes absent; an introuced species represented in Somaliland by a few weedy species"	Cactaceae
28	"Inflorescences of numerous, tiny (1-3 mm) flowers embedded on the upper surface of a flat receptacle or the inner surface of a vase-like receptacle, plants with flat receptacles herbaceous and with succulent stems or tubers, plants with vase-like receptacles trees or shrubs (figs)"	Moraceae
28	"inflorescences not of numerous tiny flowers embedded in an enlarged receptacle; plants herbaceous or woody, with or without succulent stems"	29
29	"Flowers with hypanthia; leaves simple and entire to nearly entire or digitately compound"	30
29	"Flowers without hypanthia; leaves sometimes simple or compound, margins entire or not"	51
30	"Flowers with gynophores, sometimes also androphores; stamens often exceeding the petals; petals 4-merous or absent"	Capparaceae
30	"Flowers with neither gynophores nor androphores; stamens sometimes exceeding the corollas; petals sometimes 4-merous"	31
31	"Perianths composed either of sepals and petalloid staminodes or of tepals with outer surfaces sepalloid and inner surfaces petalloid ; plants annual to perennial herbs or subshrubs, at least slightly succulent, sometimes very succulent"	Aizoaceae
31	"Perianths often with only 1 whorl. If 2 the outer of sepals and the inner of petals; plants of various habits but usually not succulent1"	32
32	"Flowers small (perianths 1-3 mm long)  with well developed nectary disk; petals, when present, hooded and clasping the stamens; stamens as many as the sepals; plants woody trees, shrubs or climbers"	Rhamnaceae
32	"Flowers often larger, nectary disks not present or inconspicuous; petals"	33
33	"Stamens more than 10 or, if fewer, ovaries with a single carpel and forming a pod with 2- many seeds at maturity; flowers radially or bilaterally symmetric"	34
33	"Stamens 10 or fewer;"	35
34	"Fruits berries, drupes, or capsules; flowers always radially symmetric; leaves  simple, glandular punctate"	Myrtaceae
34	"Fruits pods; flowers often bilaterally symmetric and with showy petals, sometimes radially symmetric; leaves usually compound, not glandular punctate,"	Fabaceae
35	"Ovaries inferior; ; fruits often winged or ridged"	Combretaceae
35	"Ovaries superior; fruits not winged or ridged"	36
36	"Sepals 2, joined at the base; ovaries semi-inferior, their bases fused to the perianth; stigmas 2-6"	"Portulacaceae {Portulaca}"
36	"Sepals more than 2, usually not fused at the base, nor adnate; ovaries usually superior and free from the perianth, sometimes inferior or partly so"	37
37	"Perianth of 1 whorl, the lower portion closely adhering to the ovary, thickening and persistent at maturity, the upper portion petalloid or with a petalloid rim near the top,  falling as the fruit matures; ovaries with 1 ovel and 1 style"	Nyctaginaceae
37	"Perianth usually of 2 whorls. If of one, not with a persistent, thickened lower portion and deciduous petalloid upper portion"	38
38	"Flowers unisexual; ovaries usually 3-lobed; styles usually 3 or 3-branched, the branches sometimes bifid or laciniate; plants often with white latex"	39
38	"Flowers unisexual or bisexual; ovaries rarely 3-lobed; styles rarely 3 or 3 branched; latex never white"	40
39	"Seeds with caruncles; seed coats smooth, shiny"	Euphorbiaceae
39	"Seeds without caruncles; seed coats not smooth"	Phyllanthaceae
40	"Plants with at least two of the following: stellate hairs; filaments forming a staminal tube; leaves alternate and simple or digitately lobed to compound;"	Malvaceae
40	"Plants usually without stellate hairs; filaments usually not formaing a staminal tube; leaves opposite or alternate, simple, often entire but sometimes lobed or compound"	41
41	"Perianths of 1 whorl, tepals of sterile flowers sometimes modified into spines, bristles, scales, or wings"	42
41	"Perianths with both a calyx and a corolla"	44
42	"Tepals of fertile flowers often expanding during fruit development, often becoming winged and/or thickened at the base; tepals of sterile flowers sometimes modified into spines, bristles, scales, or wings; fruits usually thin-walled; embryos curved or crescentic"	Amaranthaceae
42	"Tepals sepal-like in all flowers, not thickened at the base; embryos straight"	43
43	"Ovaries superior; leaves opposite"	"Buxaceae {Buxus hildebrandtii}"
43	"Ovaries more or less inferior; leaves alternate"	Santalaceae
44	"Stamens 6, 4 long, 2 short; ovaries with 2 cells, developing into fruits with 2 cells divided by a flat translucent membrane; valves falling off at maturity, leaving the membrane"	Brassicaceae
44	"Stamens not 6 or, if 6, all similar in length; ovaries with 1-5 (-20) cells, never forming fruits with a flat translucent membrane separating the two cells"	45
45	"Plants usually climbing herbs or lianas but sometimes trailing herbs or erect shrubs or trees; plants often with tendrils; fruits berries with 1-4-seeds (think grapes)"	Vitaceae
45	"Plants not climbing; fruits varied, usually not berries with 1-4 seeds"	46
46	"Plants usually succulent; ovaries free or united only at the base; fruits follicles, mostly opening inwards"	Crassulaceae
46	"Plants not succulent; carpels usually united, forming a single ovary often with 2 or more cells; fruits various but not follicles"	47
47	"Stamens usually united by their filaments; plants trees or shrubs, rarely spines; leaves usually pinnately compound, sometimes with only 1 or 3 leaflets, sometimes simple"	Meliaceae
47	"Stamens not united; leaves simple or with 1-3 leaflets"	48
48	"Stems pachycaul; leaves 1-3-times odd-pinnate; flowers radially to  bilaterally symmetric, often appearing before the leaves; stamens 5 alternating with 3-5 staminodes; anthers dorsifixed; fruits elongated capsules"	"Moringaceae {Moringa}"
48	"Stems not pachycaul; leaves simple or 1-times pinnately compound, sometimes with only 1 or 3 leaflets; anthers not dorsifixed; fruits not elongated capsules"	49
49	"Leaves simple to lobed highly pinnately divided but not compound; ovaries of 2-6 free or united carpels; nectary disk usually present, often extended on one side; inflorecences terminal spikes or racemes"	Resedaceae
49	"Leaves usually simple, sometimes pinnately compound but not lobed; ovaries of united carpels; inflorescences various, usually not spikes or racemes"	50
50	"Nectary disk absent or represented by small glands between the filaments; plants unarmed or with axillary spines; fruits usually a 1-seeded berry or drupe"	Salvadoraceae
50	"Not as above"	"3 families left"
51	"Flowers sessile in bracteate heads; leaves usually alternate, sometimes opposite"	"Thymelaeaceae {Lasiosiphon}"
51	"Flowers pedicellate, incompound cymes of thyrses; leaves usually opposite"	Lythraceae