flora neotropica - CNCFlora

Systematic Treatment 17
83. Leaf apex distinctly acuminate or sharply acute.
91. Leaves 3-4 cm long, with two conspicuous glands at junction of petiole with upper surface of
lamina (Guyana).
120. L. microphylla.
91. Leaves predominantly large, exceeding 5 cm, lacking conspicuous glands.
92. Stamens 3.
93. Leaf undersurface with stomatal cavities.
94. Leaf venation glabrous or glabrescent, hence conspicuous, with glands present at
base of lower surface; leaves coriaceous; stipules less than 1.5 mm broad at base
(Peru; Brazil; Colombian Amazonia).
121. L. triandra.
94. Leaf venation pubescent, lanate pubescence covering entire leaf and obscuring stomatal
cavities of lower surface, lacking glands at leaf base; leaves chartaceous; stipules
2.5 mm broad at base (Brazil, Para).
121.1. L. tocantina.
93. Leaf undersurface with prominent venation but no stomatal cavities, the venation pubescent
and hence less conspicuous.
95. Stipules caducous, petioles glabrous or tomentose; receptacle campanulate.
96. Petioles tomentose when young; leaves elliptic to oblong, with well-developed
acumen; primary veins 7-9 pairs (Venezuela; Guianas; Brazil). 122. L. discolor.
96. Petioles glabrous; leaves oblong-lanceolate, finely apiculate; primary veins 10-
12 pairs (Brazil, Amazonia).
123. L. apiculata.
95. Stipules persistent, petioles glabrous or puberulous when young; receptacle campanulate
or urceolate.
97. Inflorescence 8-15 cm long, spreading, with numerous primary branches; lower
leaf surface brown-lanate; receptacle campanulate (Colombia; Venezuela; Guianas;
Brazil, Amazonia, Bahia).
124. L. micrantha.
97. Inflorescence 5-6 cm long, with a few primary branches; lower leaf surface
whitish-gray-pubescent; receptacle urceolate.
98. Leaf apex with a finely pointed acumen; leaves thin-membranous (French
Guiana; Brazil, Amapa).
125. L. pruinosa.
98. Leaf apex acute to bluntly acuminate; leaves coriaceous.
99. Leaves thinly coriaceous, 4.5-10.5 x 2-5.5 cm; flowers 4-5 mm long;
interior of receptacle pubescent on upper portion (E-central Brazil).
126. L. nitida.
99. Leaves thickly coriaceous, 3-5.5 x 2-3 cm; flowers 2 mm long; interior
of receptacle glabrous on upper portion (Brazil, NW Amazonia).
126.1 L. aracaensis.
92. Stamens 4-8(-10).
100. Leaf underside with deep, extremely conspicuous stomatal cavities, the pubescence
confined to cavities made obvious by almost glabrous venation.
101. Inflorescence and flowers ferrugineous-pubescent; stipules 1-2 mm long x 1-1.5
mm broad at base, persistent, ferrugineous; leaf apex acute to bluntly acuminate
(E-central Brazil).
127. L. riedelii.
101. Inflorescence and flowers gray-puberulous; stipules 2-4 mm long, 0.2-0.5 mm
broad at base, persistent or caducous, pubescent but not ferrugineous; leaf with
well-developed acumen.
102. Bracteoles persistent, lanceolate; upper surface of midrib impressed; stipules
caducous (Brazil, Amazonia).
128. L. bracteata.
102. Bracteoles caducous, triangular; upper surface of midrib plane; stipules small
but persistent.
103. Inflorescence branches thick; flowers subsessile; fruit exterior ferrugineous-velutinous
(Venezuela; Colombia; Guianas; Brazil, Amazonia).
129. L. parviflora.
103. Inflorescence branches slender; flowers distinctly pedicellate; fruit exterior
reddish-brown, short-pulverulent (Venezuela; Brazil, Amazonas).
81. L. pallida.
100. Leaf underside with poorly developed stomatal cavities or none, venation pubescent.
104. Petioles 1.5-2 cm long; inflorescence rachis and branches glabrous or glabrescent
(Guianas; Brazil, Para).
130. L. robusta.
104. Petioles to 1 cm long (to 1.5 cm in L. bahiensis and L. lamentanda); inflorescence
rachis and branches usually densely tomentose or tomentellous.
105. Inflorescence predominantly of axillary and terminal spikes, terminal inflorescences
rarely little branched or with minute spikes along rachis.
106. Leaves lanceolate, the lower surface deeply reticulate, with poorly
developed stomatal cavities (Venezuela, Amazonas; Brazil, Roraima).
131. L. lanceolata.