Dyckia macedoi, L. B. Smith, 1952

Guarçoni, Elidio Armando Exposto, Azevedo, Aristéia Alves De & Costa, Andrea Ferreira Da, 2017, The restablishment of Dyckia oligantha and D. nana (Bromeliaceae, Pitcairnioideae), belonging to the D. macedoi complex, Phytotaxa 306 (1), pp. 49-65 : 56

Key to species from the Dyckia macedoi complex

1. Rosette symmetric; margins of the upper peduncle bracts ciliate with conspicuous marginal trichomes .......... 1. Dyckia macedoi

1’. Rosette not symmetric; margins of the upper peduncle bracts entire or spinose at the lower third..................................................2

2. Leaves not secund; flowers divergent; inflorescence peduncle 23.3–31.7 cm long, internodes 23–35.1 mm long; upper peduncle bracts entire; pedicels 4.2–6.8 mm long.....................................................................................................................2. Dyckia nana

2’. Leaves secund; flowers spreading to reflexed; inflorescence peduncle 8.9–19.7 cm long; internodes 6.2–18.1 mm long; upper peduncle bracts spinose at the lower third; pedicels 2–4 mm ........................................................................... 3. Dyckia oligantha