Flora of the Southeastern United States
2022 Edition

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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Agave

1 Leaves 0.6-10 cm wide; inflorescence a spike or raceme; leaf tip soft; [collectively widespread in dry habitats in our region]
..2 Leaf tip spinose; leaf margins armed with strong teeth; scape 30-50 dm tall
..2 Leaf tip soft; leaf margins entire, papillose, or weakly toothed; scape 2-22 dm tall.
....3 Perianth lobes erect, 4-8 mm long; [collectively widespread].
......4 Anthers 13-17 (-20) mm long; perianth (including the ovary) 26-35 mm long; perianth lobes 2.5-3 mm wide at the base
......4 Anthers 8-10 mm long; perianth (including the ovary) 20-23 mm long; perianth lobes ca. 1.5 mm wide at the base
....3 Perianth lobes spreading or recurved, 7-21 mm long; [e. TX].
........5 Filaments and style included in, or exserted from the perianth tube by 5-22 mm; fresh flowers with sweet odor
..........6 Filaments shorter than the perianth; perianth tube 23--36 mm long; leaf margins coarsely toothed
..........6 Filaments longer than the perianth, exserted by 5-22 mm; perianth tube 6-26 mm long; leaf margins minuteky toothed
........5 Filaments and style exserted from the perianth tube by 4.0-9.7 cm; fresh flowers with cooked onion odor
............ 7 Leaves spreading; flowers erect, almost appressed to the inflorescence axis
............ 7 Leaves erect or arching; flowers spreading from the inflorescence axis
1 Leaves 5-25 cm wide; inflorescence a panicle; leaf tip spinose; [aliens planted and rarely persistent or spreading usually on barrier islands, or natives of s. peninsular FL].
............ ..8 Terminal leaf spine decurrent (the tough spine tissue extending down the margins of the leaf).
............ ....9 Leaves entire or with marginal prickles towards the base of the leaf
............ ....9 Leaves with stout marginal spines from base to tip.
............ ......10 Leaves 10-20 dm long, 6-10× as long as wide; capsules 4-8 cm long
............ ......10 Leaves 8-13.5 dm long, 4-6× as long as wide; capsules 3.5.4 cm long
............ ..8 Terminal leaf spine truncate (the tough spine tissue ending abruptly, at essentially a right angle to the axis of the leaf).
............ ........11 Leaves mostly recurved
............ ........11 Leaves straight, erect to ascending
............ ..........12 Leaves entire or with few and weak marginal spines; marginal spines < 3 mm long and < 4 mm wide
............ ..........12 Leaves with marginal spines all along the margins; marginal spines > 3 mm long and to 8 mm wide
............ ............ 13 Leaves variegated, or blue-green and glaucous
............ ............ 13 Leaves bright green, not glaucous