Identification key to the species of Bulbostylis with deciduous stylopodium in Brazil

1. Perennial herbs; scape slightly pilose; inflorescence capitate............................................................................................................2

- Annual herbs; scape glabrous or densely hispid to hispidulous; inflorescence anthelate ..................................................................3

2. Involucral bracts leaf-like; glumes lanceolate, membranous, apex acute; nutlets pyriform ...................................... B. emmerichiae

- Involucral bracts glume-like; glumes ovate, coriaceous, apex obtuse; nutlets obcordiform.......................................... B. sellowiana

3. Scape glabrous; glumes membranous or coriaceous; nutlets obovoid ...............................................................................................4

- Scape densely hispid to hispidulous; glumes chartaceous; nutlets cordiform ................................................... B. litoreamazonicola

4. Involucral bracts 2–10; glumes ovate, membranous, apex obtuse to slightly acute; nutlets 0.75–1.2 × 0.5–0.75 mm ....................... ......................................................................................................................................................................................... B. communis

- Involucral bracts 1–3; glumes obovoid, coriaceous, apex short-mucronate; nutlets 1.3–1.5 × 1–1.3 mm ........................ B. decidua