Neea undetermined

Costa, Daniel da S., Rossetto, Elson Felipe S. & Giacomin, Leandro L., 2025, Neea contracta (Nyctaginaceae), a New Species from Amazonia, Systematic Botany (Basel, Switzerland) 49 (4), pp. 743-748 : 747

IDENTIFICATION KEY FOR THE NEEA SPECIES FROM AMAZONAS STATE

(Modified from Costa et al. (2021)

1. Leaves alternate.................................................................................................................... N. virens

1. Leaves opposite, subopposite or verticillate.................................................................................................. 2

2. Leaves pubescent, tomentose or hirsute................................................................................................. 3

3. Branches with trichomes. 4–5 mm long; bracteoles $ perianths.............................................................. N. hirsuta

3. Branches with trichomes, 4 mm long; bracteoles, perianths....................................................................... 4

4. Leaves with yellowish indumentum............................................................................ N. hermaphrodita

4. Leaves with ferruginous to reddish indumentum...............................................................................5

5. Intersecondary veins, 1 cm apart from secondary veins, tertiary veins ramified............................................. 6

6. Treelet or shrub, inflorescences erect...................................................................... N. parviflora

6. Large tree, inflorescences pendulous...................................................................... N. madeirana

5. Intersecondary veins, 1 cm apart from secondary veins, tertiary veins not ramified.......................................... 7

7. Terminal branch of the inflorescence in a monochasial cyme, with 3–6 flowers per cyme........................ N. rubescens

7. Terminal branch of the inflorescence in a dichasial cyme, with 1–3 flowers per cyme............................ N. ovalifolia

2. Leaves glabrous...................................................................................................................... 8

8. Leaves whorled....................................................................................................... N. verticillata

8. Leaves opposite or subopposite................................................................................................... 9

9. Inflorescence with an erect peduncle 1-branched..................................................................... N. contracta

9. Inflorescence with an erect peduncle and present secondary branches...........................................................10

10. Peduncles elongate ($ 6 cm long); endemic to Serra da Neblina range (Amazonas State)............................. N. grandis

10. Peduncles short (less than 2 cm long); widely distributed in the Amazon.................................................. 11

11. Peduncles ca. 0.5–0.6 cm long............................................................................. N. liesneri

11. Peduncles. 1 cm long......................................................................................... 12

12. Inflorescence cauliflorous................................................................................. 13

13. Branches of inflorescence sparsely pubescent................................................ N. floribunda

13. Branches of inflorescence densely pubescent................................................... N. liesneri

12. Inflorescence non-cauliflorous............................................................................. 14

14. Bracts linear; restricted to forested and open vegetation on white-sand soils....................... N. obovata

14. Bracts deltoid; not restricted to forested and open vegetation on white-sand soils......................... 15

15. Secondary axes of inflorescence congested, somewhat orbicular....................... N. oppositifolia

15. Secondary axes of inflorescence lax, similar to a panicle.......................................... 16

16. Staminate perianths obovoid, with a constricted apex............................... N. robusta

16. Staminate perianths tubular or globose, with a unconstricted apex.......................... 17

17. Staminate perianth glabrous.............................................. N. altissima

17. Staminate perianth pubescent..................................................... 18

18. Cupule of the anthocarp less than 1 cm long....................... N. manausensis

18. Cupule of the anthocarp more than 1 cm long...................... N. macrophylla