Tillandsia usneoides, Plants

Rossado, Andrés J., Donadío, Sabina & Bonifacino, José M., 2024, A taxonomic revision of Tillandsia (Tillandsioideae, Bromeliaceae) from Uruguay, Phytotaxa 667 (1), pp. 1-90 : 1-90

- Leaves distichously arranged ........................................................................................................................................................... 2 Leaves spirally arranged ................................................................................................................................................................... 7 Plants very long-caulescent, forming hanging clumps; stems exposed, densely lepidote ...................................... 16. T. usneoides Plants short-caulescent or acaulescent, forming globose or semiglobose clumps (sometimes not well-defined but never hanging clumps); stems totally hidden by leaf sheaths, glabrous .................................................................................................................. 3 Peduncles with at least one bract in the middle or apical portion (sometimes located immediately below the floral bract); sepals evenly connate .................................................................................................................................................................................. 4 Peduncles bractless or with one basal foliaceous bract; sepals unequally connate (adaxial sepals more connate to each other than to the abaxial one) ............................................................................................................................................................................ 5 Apical peduncle bract never located immediately below the floral bract of the basal flower; basal floral bract at least 8 mm long; sepals more than 7 mm long; petals spatulate, limb more than 4 mm wide .............................................................. 3. T. bandensis Apical peduncle bract located immediately below the floral bract of the basal flower; basal floral bract up to 8 mm long; sepals less than 7 mm long; petals lingulate, limb up to 1.5 mm wide ...................................................................................... 11. T. recurvata Leaf blades more than 3 mm wide (live), channelled from the base to almost the apex; peduncles densely lepidote throughout; floral bracts more than 10 mm long .......................................................................................................................... 10. T. myosura Leaf blades less than 2 mm wide (live), not channelled (adaxial face convex) or channelled only at the very base; peduncles glabrous or with trichomes towards the apex; floral bracts up to 9 mm long .................................................................................. 6 Floral bracts glabrous; adaxial sepals connate to each other by less than ½ of their length (<2 mm) ...................... 4. T. capillaris Floral bracts denselY lepidote; adaxial sepals connate to each other bY more than ⅔ of their length (> 4 mm) ...... 17. T. virescens Inflorescences compound ................................................................................................................................................................. 8 Inflorescences simple ....................................................................................................................................................................... 9 Leaf blades gray, fleshy, stiff, apically coiled; primary peduncles bearing sterile bracts; floral bracts ecarinate; sepals glabrous or with scattered trichomes; petals lilac .............................................................................................................................. 5. T. duratii Leaf blades green to green-grayish, thin, flexible, apically straight; primary peduncles bractless; floral bracts carinate; sepals densely to subdensely lepidote; petals pink ............................................................................................................ 6. T. geminiflora Flowers spirally arranged ............................................................................................................................................................... 10 Flowers distichously arranged ........................................................................................................................................................ 13 10.

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