Drosera, L.

Rivadavia, Fernando & Gonella, Paulo Minatel, 2011, Drosera quartzicola (Droseraceae), a new and threatened species from the Serra do Cipó, Brazil, Phytotaxa 29, pp. 33-40 : 39-40

Key to the Drosera of the Serra do Cipó, Minas Gerais State

1. Plants with leaves lanceolate to oblong-lanceolate, with acute apex ......................................................................... 2

- Plants with leaves oblong, obovate, oblanceolate, cuneate or spatulate, with obtuse or truncate apex ..................... 5

2. Plants with petioles graduating continuously into lamina, the petiole shorter or as long as the lamina .................... 3

- Plants with petioles distinct, narrower and longer than the lamina ............................................................................ 4

3. Plants with rectangular stipules 1–4 mm long, leaves 6–22 mm long, petioles much shorter than the lamina, 1–5 mm long, with eglandular hairs covering both adaxial and abaxial surfaces, inflorescences 6–18 cm long .... D. schwackei

- Plants with triangular stipules 6–8 mm long, leaves (7–) 10–40 mm long, petioles as long as the lamina, (3.5–) 5–20 mm long, with eglandular hairs covering only the abaxial surface, inflorescences 1.7–11.5 cm long .... D. quartzicola

4. Plants with stems 5.0– 46.5 cm long, visible internodes, numerous functional leaves, petioles ≤ 45 mm long, stipules ≤ 10 mm long ........................................................................................................................................... D. chrysolepis

- Plants with stems 0.5–3.0 cm long, internodes not visible, only 1–2 (rarely 3) functional leaves per plant, petioles 25–105 mm long, stipules 7–13 mm long........................................................................................ D. camporupestris

5. Plants with semi-erect leaves, sometimes forming a long and visible stem, seeds fusiform....................................... 6

- Plants with leaves adpressed to the ground, acaulescent or forming a short column of accumulated dead leaves, seeds ovoid .................................................................................................................................................................. 7

6. Plants with obovate to oblanceolate leaves, flower scapes with pronounced curve at the base (ascending), sometimes forming long stems when growing in semi-aquatic habitats .................................................................... D. communis

- Plants with spatulate-linear leaves, flower scapes erect at the base, forming stems 1–28 cm in length even in drier habitats ...................................................................................................................................................... D. grantsaui

7. Petioles representing about half of total leaf length, much narrower than the lamina, flower scape ascending at the base, densely covered with red eglandular hairs at basal two thirds of length ............................................ D. hirtella

- Petioles much shorter than and graduating continuously into the lamina (representing about a quarter of total leaf length), flower scape erect at the base and glabrous to densely covered with white eglandular hairs ....................... 8

8. Leaves obovate-cuneate with 7–12 well-developed apical tentacles with bilateral symmetry 4–9 mm long, with a long rectangular-linear head 0.7–1.2 mm long ...................................................................................... D. tentaculata

- Leaves oblong, obovate or oblong-spatulate, bilateral symmetric tentacles lacking or, if present, only up to 5 mm long, with head only up to 0.6 mm long ..................................................................................................................... 9

9. Plants usually blooming during summer and fall, leaves oblong to oblong-spatulate, glabrous to sparsely pilose abaxially, petioles 0.2–0.5 mm wide, sepals 2–6 mm long and 0.8–2.0 mm wide .................................... D. montana

- Plants usually blooming during winter and spring, leaves obovate to oblong-obovate, sparse to densely pilose abaxially, petioles 0.4–3.0 mm wide, sepals only up to 3 mm long and up to 1.3 mm wide ........................... D. tomentosa