| P. hamulifer | P. peronopetalus | P. smithii | P. job-kuijtii |
| Inflorescence morphology | a double triad, several per leaf axil | an umbel of 4 triads | a raceme of 2–6 triads | double triads usually, rarely triple triads, or a monad with two triads |
| Corolla colour | reddish orange to intense red with yellow tip | red and yellow, with black tip | red to orange in basal portion and yellow coloured in middle and distal portion | red to orange in proximal and medial portions, yellow in distal portion |
| Flower length in pre-anthesis (cm) | 5–6 | 3–3.6 | ca 5 | 4–5 |
| Flower bud apex shape | rounded | slightly dilated to 2.5 mm below, with papillate petal apexes spreading | slightly beaked beyond the anther area, acuminate | rounded to obtuse |
| Basal ligule | tongue-like, membranous, terminating in small digitate processes, 1–1.5 mm long | erect, apex with short hairs, these hairs are similar on the petal wall behind the ligule, 1.5 mm long | fleshy, with minute, short epidermal papillae, as on the inner petal nearby, ca 1.5 mm long | deltoid, fleshy, with minute papillae, petal wall glabrous behind ligule, 1.8–2 mm long |
| Filament length (mm) | 13–15 | 10–15 | 16–18 | 10–14 |
| Anther length (mm) | 4.5–5 | 2.5–3 | 4–5 | 2.8–3.8 |
| Calyculus shape | somewhat eroded | shallowly dentate | smooth to slightly lacerate | truncate and notched or dentate |
| Distribution and elevation | Chocó biogeographic region from Panama and Colombia, 80–1400 m | Amazon Region: Brazil, Colombia, Ecuador, French Guiana, Guyana and Venezuela, 80–700 m | Sierra Nevada de Santa Marta, Colombia, ca 1500 m | northern central cordillera, Colombia, 400–1100 m |