Leandra sect. Leandra

Reginato, Marcelo, 2016, Taxonomic revision of Leandra sect. Leandra (Melastomataceae, Miconieae), Phytotaxa 262 (1), pp. 448-450 : 448-450

Key to the species of Leandra sect. Leandra

1. Inflorescences predominantly axillary ................................................................................................................................... 2

- Inflorescences predominantly terminal .................................................................................................................................. 6

2. Leaves apparently glabrous, inflorescences lax and long pedunculate, petals with apex rounded or slightly truncate .......... ............................................................................................................................... ............................................. L. capilliflora

- Leaves with conspicuous indumentum (unbranched eglandular trichomes), inflorescences glomerulate, sessile or short pedunculate or solitary flowers, petals with apex acute and/or acuminate ............................................................................ 3

3. External calyx teeth (6) 7–10 mm long, non-involucral bracteoles ................................................................ L. loligomorpha

- External calyx teeth less than 5 mm long, involucral bracteoles (reduced in L. angustifolia , only partially covering the hypanthia)..................................................................................................................... .......................................................... 4

4. Branches and petioles with trichomes 3–8 mm long, leaf blades elliptic to obovate, style straight and surrounded by the stamens at anthesis .............................................................................................................................................. L. cogniauxii

- Branches with trichomes less than 4 mm long, leaf blades predominantly lanceolate, style sigmoid and opposite of the stamens at anthesis...................................................................................................................................................................... 5

5. Leaves with trichomes 2.5–4 mm long; bracteoles 7–9 mm long ........................................................................... L. capitata

- Leaves with trichomes smaller than 2 mm long; bracteoles 2.5–5.5 mm long ................................................. L. angustifolia

6. Inflorescences formed by one glomerule (up to 3 flowers) or a solitary flower ..................................................... L. triantha

- Inflorescences with more than 3 flowers ............................................................................................................................... 7

7. Leaf bases amplexicaulous ............................................................................................................................. L. amplexicaulis

- Leaf bases not amplexicaulous............................................................................................................................................... 8

8. Leaves with glandular trichomes (this feature makes the plants viscous when living) ......................................................... 9

- Leaves without glandular trichomes (plants not viscous when living) ................................................................................ 10

9. Larger stamen filaments 7–8 mm long, larger anthers 5–9 mm long, connective produced below the anther (0.8–1.5 mm) and appendaged ............................................................................................................................... ..................... L. umbellata

- Larger stamen filaments ca. 4 mm long, larger anthers ca. 3 mm long, connective not produced below the anther and unappendaged ...................................................................................................................................................................... L. lapae

10. Bracteoles persistent during flowering and fruiting, involucral, anthers pink......................................................................11

- Bracteoles early caducous, not forming a tight involucre (partially or non-involucral), anthers usually white (pink in L. aspera and L. therezopolitana ) ............................................................................................................................................. 14

11. Leaves with 7 acrodromous nerves (including 5+2) ............................................................................................................ 12

- Leaves with 5 or fewer acrodromous nerves........................................................................................................................ 13

12. Leaf blades predominantly elliptic, base decurrent or cuneate, seldom obtuse ........................................................ L. sericea

- Leaf blades predominantly ovate, base rounded .......................................................................................................... L. ulaei

13. Branches with trichomes 1.5–4 mm long, petioles (0.2)0.5–1(1.5) cm long, larger stamens with anthers 5.5–7.5 mm long, fruits 10–13 × 7.5–9 cm ..................................................................................................................................... L. glazioviana

- Branches with trichomes 0.4–2 mm, petioles 0.2–3 cm long, larger stamens with anthers 3.4–4.5 mm long, fruits 5–10 × 4–6 cm .......................................................................................................................................................... L. melastomoides

14. Leaves basally nerved ............................................................................................................................................... L. aspera

- Leaves plinerved .................................................................................................................................................................. 15