flora neotropica - CNCFlora

Systematic Treatment 7
6. Inflorescence terminal or axillary, but on leafy shoot apex.
11. Flowers 1.5-2 mm long; leaves 12-19 x 3-6 cm, brown-pubescent beneath, without
conspicuously reticulate venation (Colombia).
148. L. veneralensis.
11. Flowers 3-5 mm long; leaves 15-35 x 6-13 cm, gray-pubescent beneath, often with
conspicuously reticulate parallel tertiary venation.
12. Inflorescence and flowers with light-brown-tomentellous pubescence, leaves gradually
tapering from mid-point to acuminate apex; center primary veins far apart
(18-22 mm), the secondary venation obscure (Colombia, Choc6). 3. L. maritima.
12. Inflorescence and flowers with ferrugineous pubescence; leaves tapering from well
above midpoint, center primary veins 5-13 mm apart, with conspicuous parallel
secondary venation.
13. Leaves 6-9.5 x 2-3 cm; petioles 4-5 mm long (Venezuela, Lara).
5.4. L. montana.
13. Leaves 12-46 x 3-26 cm; petioles 6-12 mm long.
14. Inflorescences of racemose panicles, to 18 cm long; petioles 10-12 mm
long; primary veins 16-19 pairs, pedicels 5 mm long (Colombia, Antioquia).
5.2. L. cabrerae.
14. Inflorescences unbranched racemes, or little-branched panicles, 5-13 cm
long. Petioles 6-8 mm long, primary veins 21-24 pairs; flowers sessile
(Peru, San Martin).
4.1. L. filomenoi.
2. Leaf underside glabrous when mature (sometimes lanate when young).
15. Inflorescence and exterior of flowers glabrous or sparsely puberulous.
16. Leaf broadly acuminate, the acumen 4-8 mm long; flowers 2.5-3 mm long; pedicels 2-5
mm long (Brazil, Bahia).
6. L. salzmannii.
16. Leaf with well-developed finely pointed acumen 8-12 mm long; flowers 4-4.5 mm long;
pedicels 1-3 mm long.
17. Inflorescence and exterior of flowers puberulous; petioles 10-12 mm long; leaves elliptic,
5.5-9 cm broad (Peru, Loreto).
7. L. klugii.
17. Inflorescence and exterior of flowers glabrescent; petioles 5-7(-9) mm long; leaves
oblong to oblong-elliptic, 2-5.5 cm broad (Guianas; Peruvian Amazonia).
8. L. guianensis.
15. Exterior of flowers and usually inflorescence densely tomentose.
18. Inflorescence either of dense pyramidal or cymose panicles with a glabrous to puberulous
rachis, or a much branched panicle with the primary branches branched into small branches
bearing 2 or more flowers.
19. Inflorescence a much branched panicle 10-25 cm long, with the primary branches
branched into small branches; leaves 5.5-10.5 cm broad (Ecuador). 13.1. L. dodsonii.
19. Inflorescence of dense pyramidal or rather lax cymose panicles 1-5 cm long; leaves 1-
4.5 cm broad.
20. Inflorescence short and dense, the rachis glabrous; petioles 4-6 mm long (Mexico).
9. L. retifolia.
20. Inflorescence lax, the rachis puberulous; petioles 1-3 mm long (SE U.S.A.).
1. L. michauxii.
18. Inflorescence of lax racemes or racemose panicles, the rachis pubescent.
21. Pedicels 3-7 mm long; leaves with finely pointed acumen 1.5-2.5 cm long (Brazil,
Amazonas).
10. L. longipedicellata.
21. Pedicels 0.5-2.5 mm long; leaf acumen rather blunt, less than 10 mm long.
22. Inflorescence of predominantly axillary racemes or few-branched panicles (NE
Brazil).
11. L. tomentosa.
22. Inflorescence of predominantly terminal much-branched panicles or racemose panicles,
rarely axillary, then much branched.
23. Leaves with a lanate pubescence when young; petioles 8-16 mm long and very
slender, not more than 1.2 mm thick (W Indies; Venezuela). 12. L. pyrifolia.
23. Leaves glabrous even when young; petioles 3-12 mm long, stout, more than
1.5 mm thick.
24. Leaf bases cuneate; stamens ca. 30; petioles canaliculate (W Indies; Venezuela).
13. L. leucosepala.
24. Leaf bases cordate, rounded or subcuneate; stamens 12-23; petioles usually
terete, rarely canaliculate.
25. Leaves oblong-lanceolate, primary veins slightly impressed above.
26. Petioles 10-13 mm long; leaves 10-14.5 x 2.5-5.2 cm; primary
veins 11-17 pairs; stamens 17 (Peru; Brazil, W Amazonia).
14. L. angusataa.