| 1 | PETALS | Spreading at anthesis | 3 |
| Not spreading at anthesis | 2 | ||
| 2 | PETALS | White, Leaf blades dark green with darker spots or dark purple cross bands | leucophoea |
| Yellow, Leaf blades light green without spots | ibitipocensis | ||
| 3 | PETALS | 5 - 10 cm long | 18 |
| less than 5 cm long | 4 | ||
| 4 | PETALS | Not joined. Plants from Amazon Basin | 5 |
| Joined. Plants from S.E. Brazil | 34 | ||
| 5 | LEAVES | Tongue shaped | 6 |
| Narrow triangular | 9 | ||
| 6 | SEPALS | Mostly free, inflorescence 6-8 cm. diam. | 7 |
| Joined, inflorescence ca. 1 cm. diam. | 9 | ||
| 7 | INFLORESCENCE | Compound 6-8 cm. diam. | eleutheropetala |
| Simple, pedicels distinct | 8 | ||
| 8 | LEAF BLADES | Suffused rose especially on margins and tip at flowering. Petals palest lavender to whitish. |
cathcartii |
| Purple red spotted and at tip. Petals dark blue towards tip | johnsoniae | ||
| 9 | STOLONS | Long | 10 |
| Short, leaves up to 20 cm. long. Petals blue | leviana | ||
| 10 | LEAVES | Over 30 cm. long, inner leaves turning red at flowering, Petals white 1 cm. long | margaretae |
| 15-20 cm. long. Inner leaves NOT turning red, Petals white, 2.5cm. long | tarapotoensis | ||
| 11 | SEPALS | Free | 12 |
| Joined for 2-7 mm. | 14 | ||
| 12 | SEPALS | Sparsely lepidote | wurdackii |
| Not lepidote, Petals white | myrmecophila | ||
| 13 | NOT USED | ||
| 14 | LEAF BLADES | 5mm. wide | pendula |
| 10 - 40mm. wide | 15 | ||
| 15 | INFLORESCENCE | Compound, Sepals 32 mm., leaves 50 - 60 cm. long | rosea |
| Simple, Sepals 10- 13 mm. | 17 | ||
| 16 | NOT USED | ||
| 17 | STOLONS | 8mm. thick, leaves 20 - 30 cm. long, teeth pointed towards leaf tip | mooreana |
| 4mm. thick, leaves ca. 5 - 18 cm. long, teeth pointed away from leaf tip | stolonifera | ||
| 18 | LEAF BLADES | 4 - 8 cm. wide | 19 |
| 2 - 4 cm. wide | 27 | ||
| 19 | LEAF BLADES | Spiny | 20 |
| Not spiny | 21 | ||
| 20 | LEAF BLADES | With crossbands | rubrovittata |
| Without crossbands | 22 | ||
| 21 | LEAF BLADES | Green, stolons to 10 cm. long | brigadeirensis |
| With crossbands, stolons to 4 cm. long | azevedoi | ||
| 22 | SEPALS | 4 - 8 cm. wide | 23 |
| 3 - 4 cm. wide | 24 | ||
| 23 | PLANT | Almost tubular | tenebrosa |
| Open rosette | menescalii | ||
| 24 | LEAVES | Strongly lepidote on outside | 25 |
| Sparsely lepidote on outside | 26 | ||
| 25 | PEDICELS | 3 - 3.5 cm long | longipedicellata |
| 1 cm long | inexpectata | ||
| 26 | OUTER LEAVES | Tongue-like, stolons with blunt leaves | brownii |
| Triangular, stolons with pointed leaves | bragarum | ||
| 27 | LEAF BLADES | Not spiny or very few | 28 |
| Spiny | 29 | ||
| 28 | STOLONS | To 10 cm long | brigadeirensis |
| To 4 cm long | azevedoi | ||
| 29 | OUTER LEAVES | Same shape as inside | 30 |
| Narrower than inside | 32 | ||
| 30 | LEAVES | Papery, few flowered | 31 |
| Leathery, 10 or more flowered | bahiana | ||
| 31 | STOLONS | To 5 cm. long | kerryi |
| 10 cm. - 20 cm. long | mucugensis | ||
| 32 | PETALS | Joined for 3 - 3.5 cm, from Sao Paulo | paulistana |
| Joined for 1.5 - 2.5 cm, from Espirito Santo | 33 | ||
| 33 | PLANT | Tubular shape, leaf-blades 10 cm. long | diversifolia |
| Funnel shape, leaf-blades 25 - 40 cm. long | inexpectata | ||
| 34 | INFLORESCENCE | Compound | 35 |
| Simple | 39 | ||
| 35 | LEAVES | Over 1 m long with 4mm. long dark purple teeth, Sepals 50mm.long Petals 60mm. long violet |
longisepala |
| To 30cm. long with sparse lmm. long teeth | 36 | ||
| 36 | INNER LEAVES | Changing colour at anthesis | 37 |
| NOT changing colour at anthesis | 38 | ||
| 37 | INNER LEAVES | White | lactea |
| With pink transverse band, Floral bracts red with brown scales. Petals blue, barely opening. |
lymaniana | ||
| 38 | FLORAL BRACTS | Red with pale scales. Leaves with dark red tip. Petals reddish | fosteriana |
| Purple, Petals white. | marceloi | ||
| 39 | INNER LEAVES | Coloring at OR before anthesis | 40 |
| NOT clearly coloring | 57 | ||
| 40 | INNER LEAVES | Coloring reddish | 41 |
| Coloring OTHER than red | 52 | ||
| 41 | LEAF UNDERSIDE | Conspicuous grey scaled | 42 |
| NOT conspicuous scaled | 46 | ||
| 42 | FLORAL BRACTS | With toothed edges. Petals dark blue towards tip | pineliana |
| With smooth edges | 43 | ||
| 43 | SEPALS | 35- 38mm long, Pedicels 25-30mm | 44 |
| 24-27 mm long, Pedicels 5-10 mm | 45 | ||
| 44 | LEAVES | Fine red-purple spots on green Sepals to 35 mm long. Pedicels to 25 mm long, petals lavender-blue tipped (NOTE var. teresae has smaller inflorescence and shorter sepals and pedicels.) |
magdalenae |
| Wholly green (except for inner ones RED at anthesis), Sepals 38 mm long. Pedicels 30 mm. long |
macrosepala | ||
| 45 | FLORAL BRACTS | Red, Sepals red | princeps |
| Green, Sepals green | farinosa | ||
| 46 | LEAF TIP | Narrowing to a point | olens |
| Rounded | 47 | ||
| 47 | FLORAL BRACTS | Short, equalling the ovary. Leaf blade with red tip. Leaf sheath dark purple, petals 23 mm long, blue |
indecora |
| Long, exceeding the ovary | 48 | ||
| 48 | INNER LEAVES | Totally RED at flowering, ALL Blades with strong spines. | 49 |
| Red banded at flowering | 51 | ||
| Red with small white spots or blotches (Note. Leaves 20 - 30 cm long, 2.5 - 3 cm wide = ssp. meeana) |
burle-marxii | ||
| 49 | FLORAL BRACTS | About equalling the sepals | 50 |
| Exceeding the Ovary BUT shorter than Sepals | eltoniana | ||
| 50 | LEAVES | Green with strong teeth to 1 mm. long | carolinae |
| Green with dark purple splashes or spots. With strong black teeth to 4mm long | concentrica | ||
| 51 | LEAVES | Over 32 cm. long, 55mm wide, remaining more or less upright on flowering | macwilliamsii |
| 28- 30 cm long, densely spined, Floral bract blunt, Sepals connate for 4 mm | sanguinea | ||
| To 26 cm long, 32 mm wide, flattening at flowering | compacta | ||
| To 34 cm long, 40 mm wide, purplish spotted with red tips | camorimiana | ||
| 52 | LEAF BLADES | With strong BLACK teeth to 4mm long. Inner leaves purple at anthesis. Pedicels 10 - 18 mm. Sepals sub free |
concentrica |
| With small teeth or few small teeth. Inner leaves purple or dark violet | 53 | ||
| 53 | SEPALS | Hooked | 54 |
| NOT Hooked | 55 | ||
| 54 | SCAPE | Almost double length of Inflorescence, Outer bracts equalling height of sepals. Sepals scaled on inside. |
coimbrae |
| Same length as Inflorescence | smithii | ||
| 55 | SEPALS | Slightly asymmetric, long acuminate or long attenuate | 56 |
| Strongly asymmetric, broadly rounded, center leaves purple | angustifolia | ||
| 56 | SEPALS | Joined for long way. Pedicels 8 - 10 mm. Center leaves dark violet | coriacea |
| Almost free. Pedicels 10 - 18 mm. Center leaves purple | concentrica | ||
| Almost free. Pedicels to 5mm. Center leaves purple | atroviridifolia | ||
| 57 | LEAF SHEATHS | Forming a tube | 58 |
| Forming an open funnel shape, not constricted at apex | 67 | ||
| 58 | LEAF TIPS | Narrowing to a point | 59 |
| Rounded | 60 | ||
| 59 | LEAF BLADES | NOT lepidote, yellowish- green, often with reddish transverse bands on outside | wilsoniana |
| Sparsely lepidote with straight edges with 1 mm black teeth and with fine regular white cross lines on outside, leaf sheaths dark purple on the outside. |
pauciflora | ||
| 60 | LEAF BLADES | Spotted or banded | 63 |
| NOT spotted | 61 | ||
| 61 | PEDICELS | Short to 5 mm. long | 62 |
| to 20 mm long, stolons long & slender, Juvenile offsets with narrow triangular leaves becoming wider and rounded at maturity |
abendrothae | ||
| 27 - 35 mm long, stolons long, leaves with blunt keel at base | carinata | ||
| 62 | LEAF BLADES | 25mm wide, sepals with broad tip, stolons long and slender | hoehneana |
| 10 - l5 mm. wide, sepals with pointed tip, stolons long and slender | dungsiana | ||
| 63 | LEAF SHEATH | Paler spots than leaf blade | chlorosticta |
| Darker spots or bands than leaf blade | 64 | ||
| Darker than blade, olive to brownish red in colour, faint banding. Petals white with three green longitudinal lines |
amandae | ||
| 64 | PETALS | 42 mm. long, leaf blades 4 cm. wide | punctatissima |
| 20 - 24 mm. long | 65 | ||
| 65 | LEAF BLADES | To 17 mm. wide | 66 |
| To 45 mm. wide, purplish green with brown spots | rubrifolia | ||
| 66 | LEAF BLADES | Green with red to purple to black broken bands. Leaf sheaths forming a tight tube. Flowers mainly within leaf tube. |
ampullacea |
| As above but leaves only 5 cm. long, flowers well EXCEED leaf tube. | lilliputiana | ||
| Yellow green with brown broken bands, leaf sheaths forming an open funnel. | tigrina | ||
| 67 | PLANT | Small, leaves mainly 18- 35 cm long, Blades 10 - 40 mm wide, flower short, to 45 mm long, Sepals 11- 18 mm long |
68 |
| Large, leaves mainly 15-90 cm long, Blades 20- 100 mm wide, flower long to 70 mm, Sepals19-40 mm long |
82 | ||
| 68 | LEAF BLADES | To 4 cm wide, reddish colour, petals to 4 cm long white with lilac apex | crispata |
| To 3 cm or LESS | 69 | ||
| 69 | LEAF BLADES | Densely appressed lepidote | 70 |
| NOT densely appressed lepidote | 74 | ||
| 70 | LEAF BLADES | With blunt end caused by tip SHARPLY bending over, Sepals strongly asymmetric | leprosa |
| With longitudinal creases next to sheath | zaslawskyi | ||
| Inner ones rounded and coming to a tip. | 71 | ||
| 71 | SEPALS | Reddish purple, gradually coming to a tip, asymmetric | tristis |
| NOT reddish purple | 72 | ||
| 72 | FLORAL BRACTS | ONLY 2 mm wide, glabrous | angustibracteata |
| at least 5 mm wide, scaled | 73 | ||
| 73 | SEPALS | Almost symmetrical and coming to a point | fluminensis |
| STRONGLY asymmetrical and blunt at the tip, floral bracts equalling 0.75 of the sepal | simulans | ||
| STRONGLY asymmetrical and coming to a point floral bracts as long as sepals | martinellii | ||
| 74 | LEAF BLADES | With different coloured sides and sparsely lepidote beneath | 75 |
| Same color and almost glabrous both sides | 78 | ||
| Purplish- red spotted in bottom half. Petal blades Blue | lillyae | ||
| 75 | LEAF BLADES | Finely spotted | maculata |
| NOT spotted | 76 | ||
| 76 | LEAF BLADES | Shorter than sheath, purple tinged, sepals rounded at tip. | doeringiana |
| Mostly shorter than sheath, sepals with sharp tip | roethii | ||
| Longer than sheath | 77 | ||
| 77 | LEAF BLADES | 10- 20 mm. wide, few teeth | cyanea |
| 20 - 32 mm. wide, STRONG teeth,red spot at tip | sarmentosa | ||
| 78 | SEPALS | Narrowing to a tip | 79 |
| With rounded tip | 81 | ||
| 79 | LEAVES | 40 - 50 cm. long, blades to 40 mm. wide, pedicels 20 mm. | macahensis |
| 30 - 40 cm. long, blades lustrous, 40 mm. wide , pedicels 25. mm long | petropolitana | ||
| 5 cm. long, 24 mm. wide purple spotted, pedicels to 7 mm., petals violet | lilliputiana | ||
| 80 | NOT USED | ||
| 81 | PEDICELS | To 3 mm. long, ovary club shaped, petals white. | laevis |
| To 10 mm. long, ovary elliptical, petals blue. | brevifolia | ||
| To 20mm long, ovary elliptical, petals white with lilac tip. | ruschii | ||
| 82 | LEAF SHEATHS | Spotted light or dark | 83 |
| Same color or banded NOT spotted | 84 | ||
| 83 | LEAVES | Red spotted, red tipped with stout BLACK terminal spine, floral bracts and sepals white, petals WHITE |
johannis |
| Same colour with purple spots, red tipped with inconspicuous spine, leaf sheaths dark with pale green blotches, pedicels 15 mm sepals green. |
marmorata | ||
| Red tipped, leaf sheaths purple and green spotted, pedicels 3 cm, sepals green | correia-araujoi | ||
| 84 | INFLORESCENCE | Few flowered (to 25 ) to 3 cm. diam. | 85 |
| Many flowered, over 5 cm. diam. | 93 | ||
| 85 | STOLONS | Long 30 - 40 cm. | sapiatibensis |
| Short | 86 | ||
| 86 | LEAF BLADES | 2 to 3 times as long as sheath | 87 |
| Less than 2 times as long as sheaths | 88 | ||
| 87 | LEAF BLADES | With irregular bands both sides | zonata |
| Green with wine-purple leaf sheath | pontuali | ||
| 88 | LEAF BLADES | 50 mm. wide, blunt at tip, (Bent over) | 89 |
| 20-35 mm. wide, rounded and pointed at tip | 91 | ||
| 89 | LEAF BLADES | With few dark spots and with black teeth 1.5 mm long, pedicels 20mm long | melanodonta |
| Top side green but reddish towards apex, flowers scented | odorata | ||
| Same colour green, almost no teeth | 90 | ||
| 90 | SEPALS | 9 mm. wide, asymmetric with wide membranous edges, middle section scaled | schubertii |
| 5 mm. wide, almost symmetric, glabrous | kuhlmannii | ||
| 91 | FLORAL BRACTS | Glabrous | 92 |
| With tenuous fimbriate scales both sides | capixaba | ||
| 92 | SEPALS | To 40 mm. long, joined for 7 mm. | paulistana |
| 23 mm. long, joined for 1.5 mm. | oligantha | ||
| 93 | LEAVES | Colored spot at tip | 94 |
| No spot at tip | 97 | ||
| 94 | LEAVES | Underside transverse lined lepidote | 98 |
| Underside scattered lepidote | 96 | ||
| 95 | FLORAL BRACTS | Shorter than sepals, pedicels l5 mm. long | richteri |
| Equalling sepals, pedicels 4 - 6 mm. long | spectabilis | ||
| 96 | LEAVES | Tip with dark green spot | binotii |
| Tip with red spot, medium sized plant, blades with NO spines | gavionensis | ||
| Tip with red spot, medium to large plant, blades with red spines | cruenta | ||
| 97 | LEAVES | With dull look | 98 |
| Almost glabrous | 99 | ||
| 98 | LEAF BLADES | 90 mm. wide, petals white | pascoaliana |
| 40 mm. wide, petals blue tipped | seideliana | ||
| 99 | LEAF SHEATHS | Dark brown, leaf blades 30 mm. wide, with 5 mm. long spiny tip | uleana |
| Not dark brown | 100 | ||
| 100 | LEAF TEETH | More than 7 mm. long, petals white | carcharodon |
| Up to 1 mm long, petals violet tipped, leaf blades yellowish green and reddish blotched. | kautskyi | ||