Trichocline, Cass.

Pasini, Eduardo, Bonifacino, José Maurício & Torchelsen, Fábio Piccin, 2021, Trichocline maxima (Compositae, Mutisieae) a rare Pampean daisy rediscovered after 70 years in Uruguay, Iheringia, Série Botânica (e 2021006) 76, pp. 1-6 : 6

Key for the species of Trichocline of Brazil and Uruguay

1. Ray florets red to orange; leaves linear to linear-lobate ............................................................................................2

1’. Ray florets yellow to golden yellow; leaves lanceolate to oblanceolate ..................................................................3 2. Ray florets red, leaves rarely linear, linear-lobate, pappus bristles undulating in the apex ......... T. macrocephala 2’. Ray florets orange, leaves always linear, pappus bristles straight in the apex ................................. T. linearifolia 3. Floral scape and leaves glabrous to glabrescent ................................................................................................ 4 3’. Floral scape and leaves tomentose to lanose .....................................................................................................7 4. Floral scape 55.0–120.0 cm long; leaves 20.0–30.0 cm long ..........................................................................5 4’. Floral scape 2.0–20.0 cm long; leaves 3.0–14.0 cm long ............................................................................. 6 5. Leaves oblanceolate-lobate, glabrescent on the abaxial surface, phyllaries ovate with acute apex; floral scape 55.0–80.0 cm long. ..................................................................................................................... T. maxima 5’. Leaves lanceolate to oblanceolate, never lobate, tomentose on the abaxial surface; phyllaries lanceolate with apiculate apex; floral scape up to 120.0 cm long ............................................................... T. speciosa 6. Leaf margins irregularly pinatissect; phyllaries glabrous, apex and margin reddish brown ..... T. humilis 6’. Leaf margins crenate, never pinatissect; phyllaries tomentose on the abaxial surface, apex and margin greenish ............................................................................................................................. T. heterophylla 7. Flora scape ebracteate; leaf blades coriaceous, shiny on the adaxial surface, lobes strongly acute in the apex and ondulate in the base; plant with densely woolly indumentum .............................. T. incana 7’. Floral scape with up to 12 bracts; leaf blades membranaceous, opaque on the adaxial surface, lobes obtuse to rounded in the apex; plant with tomentose indumentum ....................................................8 8. Ray florets yellow to orange-yellow; floral scape erect or sinuose; leaf blades oblanceolate, margins entire, sinuate or lobate, with up to 6 pairs of lobes ............................................. T. catharinensis 8’. Ray florets golden-yellow, never yellow; floral scape procumbent; leaf blades spatulate, margins strongly pinatissect, with up to 10 pairs of lobes, forming secondary lobes ............... T. cisplatina