Hierochloe redolens (Vahl, 1791) Roemer & Schultes, 1817

Lema-Suárez, Irene, Sahuquillo, Elvira & Pimentel, Manuel, 2021, A revision of Hierochloe sect. Monoecia (Anthoxanthinae, Pooideae, Poaceae), Phytotaxa 478 (1), pp. 92-104 : 98

Key to the varieties of Hierochloe redolens

1. Panicle loose or slightly contracted....................................................................................................................................................2

- Panicle dense, spiciform.....................................................................................................................................................................3

2. Upper glume larger than the florets; leaf blade flat, spikelets 6.5–14 mm ............................................4.1. H. redolens var. redolens

- Upper glume smaller or equal than the florets; leaf-blade convolute; spikelets 5.5–7 mm ................................................................. ..............................................................................................................................................................4.2. H. redolens var. gunckelii

3. Upper glume longer than the florets; leaf-blade with alternate quadrangular and triangular ribs; subepidermal abaxial sclerenchyma discontinuous...........................................................................................................................................4.3. H. redolens var. spicata

- Upper glume smaller or equal than the florets; leaf-blade with quadrangular ribs; subepidermal abaxial sclerenchyma continuous ............................................................................................................................................................................................................4

4. Lemma of male florets awned; awn apically inserted; spikelet 5–7 mm; leaf-blade with 28–30 ribs ................................................. ............................................................................................................................................................ 4.4. H. redolens var. utriculata

- Lemma of male florets awned; awn subapically inserted; spikelet 6–9 mm; leaf-blade with 30–50 ribs ........................................... ..............................................................................................................................................................4.5. H. redolens var. altissima