flora neotropica - CNCFlora

80 Flora Neotropica
3. Inflorescence an elongate raceme, never branched.
5. Exterior of receptacle and calyx lobes hirsutulous; inflorescence 15-30 cm long. 5. H. guainiae.
5. Exterior of receptacle and calyx lobes hispid only; inflorescence 2-12 cm long.
6. Pedicels 4-6 mm, with sparse hirsute pubescence.
6. H. duckei.
6. Pedicels 8-15 mm with dense hirsute pubescence. 6.1. H. revillae.
Key to Hirtella Group B: Species without myrmecophilous swellings at
leaf base and with a paniculate inflorescence.
1. Bracts and/or pedicels glandular (with stalked or sessile glands).
2. Leaves glabrous beneath when mature, or rarely with a few short stiff appressed hairs.
3. Stamens 6-7.
4. Bracts with a few sessile glands only; inflorescence rachis and branches, and flower exterior
glabrous or only sparsely hirsutulous.
5. Inflorescence a spreading branched panicle, the rachis and branches glabrous.
7. H. macrosepala.
5. Flowers borne in clusters of 2-3 along a central rachis rather than a branched inflorescence,
giving a racemose appearance, the rachis and branches hirsutulous.
6. Leaf lamina 6-9.5 cm long, 2.5-3.8 cm broad, the acumen 9-14 mm long; petioles 2-
2.5 mm long.
11.1. H. barnebyi.
6. Leaf lamina 21-27 cm long, 6-9 cm broad, the acumen 1-5.5 mm long; petioles 8-10
mm long.
11.2. H. margae.
4. Bracts with numerous stalked glands; inflorescence rachis and branches, and flower exterior
pubescent.
7. Leaves 3.5-8.5 cm long, 1.4-4.5 cm broad; stipules linear, to 6 mm long (Africa).
90. H. zanzibarica.
7. Leaves (6.4-)8-13 cm long, 4-7 cm broad; stipules deltoid, to 2 mm long (neotropics).
8. Calyx lobes glandular; bract glands small, ca. 0.1 mm in diameter; rachis and branches
of inflorescence sparsely puberulous; leaves glabrous beneath. 8. H. ulei.
8. Calyx lobes eglandular; bract glands large, ca. 0.5 mm in diam.; rachis and branches
of inflorescence tomentellous; leaves sparsely appressed pubescent beneath.
9. H. glabrata.
3. Stamens 3-5.
9. Glands large and solitary on a long stalk, arising from pedicel or junction of inflorescence;
inflorescence distinctly thyrsoid.
10. H. carbonaria.
9. Glands usually numerous, long or short stalked, arising from the margins of bracts and
bracteoles; inflorescence not thyrsoid.
10. Inflorescence a long rachis bearing small clusters of flowers on very short branches; leaves
oblong-lanceolate.
11. H. araguariensis.
10. Inflorescence spreading, with many distinct lateral branches, flowers not in distinct clusters;
leaves oblong to elliptic.
11. Leaves 3-5.5 cm long, cordate at base; inflorescence scarcely branched, hirsutulous.
12. H. cordifolia.
11. Leaves usually cuneate or subcuneate at base (if subcordate then 7-17 cm long and
inflorescence glabrescent); inflorescences usually much branched.
12. Bracteolar glands few, usually either sessile on margins or a single gland terminating
apex; inflorescence usually pilose or if glabrescent then corymbose; leaf
apex acuminate.
13. Leaves 12-17 cm long, rounded to subcordate at base; fertile stamens 5.
13. H. insignis.
13. Leaves 3.5-15 cm long, cuneate at base; fertile stamens 3.
14. Leaves 10-15 cm long; bracts membranous, the glands several, borne
on margins; inflorescence 7-18 cm long, terminal. 14. H. tocantina.
14. Leaves 4-9 cm long; bracts coriaceous, with single reflexed apical gland
only; inflorescence 3-11 cm long, axillary or terminal. 15. H. piresii.
12. Bracteolar glands numerous, borne on the margins, usually short-stalked; inflorescence
spreading but not corymbose, usually glabrescent, if tomentellous then
leaf apex rounded to acute.
15. Leaves 1.8-4.5 cm long, rounded to acuminate at apex, thickly coriaceous;
primary veins 4-7 pairs. 37. H. bahiensis.
15. Leaves 6-13.5 cm long, acuminate at apex, thinly coriaceous; primary veins
9-10 pairs.