flora neotropica - CNCFlora

Systematic Treatment 81
16. Stamens 3; bracteoles coriaceous, ovate; petioles 3-4 mm long.
16. H. davisii.
16. Stamens 4; bracteoles membranous, lanceolate; petioles 1-2 mm long.
17. H. subglanduligera.
2. Leaves hirsute beneath at least on principal venation, usually more generally so.
17. Calyx lobes with small stipitate glands.
18. Leaves orbicular to ovate-elliptic, 3-6.5 cm long, retuse to mucronate at apex (rarely acuminate);
trunk with corky bark; receptacle pubescent within to base. 18. H. ciliata.
18. Leaves oblong to ovate, 4.5-23 cm long, acute to acuminate at apex; trunk with thin bark;
receptacle glabrous within except at throat.
19. Venation of leaves prominulous above; inflorescence subcorymbose, bearing numerous
tightly clustered flowers; stamens 7. 19. H. hoehnei.
19. Venation of leaves impressed or prominulous above; inflorescence lax, spreading, not
subcorymbose, the flowers loosely arranged; stamens 3-5.
20. Leaves subcordate at base, subconduplicate, the lower surface merely sparsely
appressed-pubescent.
29. H. adderleyi.
20. Leaves rounded to cuneate at base, rarely weakly subcordate but never subconduplicate,
the lower surface hirsute. 20. H. glandulosa.
17. Calyx lobes eglandular.
21. Venation of leaves impressed above, or the leaf surface bullate.
22. Inflorescence and flowers rufous-tomentose; bracts bearing very few sessile glands, these
often obscured by pubescence.
42. H. obidensis.
22. Inflorescence and flowers tomentellous to puberulous, not rufous; bracts bearing many
obvious stalked or sessile glands.
23. Leaf surface usually distinctly bullate, the base usually subcordate. 21. H. bullata.
23. Leaf upper surface plane, but with impressed venation, the base rounded to subcuneate.
24. Bracteolar glands ca. 0.5 mm in diam., sessile or slightly stipitate; bracteoles
distinct, ovate. 22. H. americana.
24. Bracteolar glands ca. 0.1 mm in diam., on slender stalks; bracteoles reduced
to a mass of glands with a slightly connate base. 27. H. tentaculata.
21. Venation of leaves prominulous or plane above, the leaf surface never bullate.
25. Stamens 3.
26. Bracteolar glands large, numerous, apparent; inflorescence tomentellous, manyflowered;
exocarp glabrescent; endocarp thin and bony. 22. H. americana.
26. Bracteolar glands small, few; inflorescence hispid, few-flowered; exocarp tomentose;
endocarp thick and fibrous. 23. H. guatemalensis.
25. Stamens 4-7.
27. Exocarp tomentose; endocarp thick and fibrous; bracts with few inconspicuous
stipitate or sessile glands.
28. Inflorescence hispid, the flowers lax; bracts with small short-stipitate glands;
stamens 4. 23. H. guatemalensis.
28. Inflorescence tomentellous, bearing small clusters of flowers on a long thick
rachis; bracts with a few large sessile glands or a single terminal gland; stamens
6. 24. H. eriandra.
27. Exocarp glabrescent; endocarp thin and bony; bracts with many conspicuous stipitate
glands, except in H. liesneri.
29. Inflorescence hispid-hirsute; bracts with short-stalked glands arising from their
margins, the secretory tip small, ellipsoid.
30. Inflorescences predominantly terminal; leaf bases rounded to weakly subcordate.
25. H. paniculata.
30. Inflorescences predominantly axillary; leaf bases deeply cordate.
26. H. deflexa.
29. Inflorescence puberulous to tomentellous; bracts either reduced to numerous,
long-stalked clavate glands arising from the junction of the pedicels with the
stem, or ovate with glands borne on their margins, the secretory tip large,
flattened, forming an expanded head.
31. Glands arising from junction of pedicel and stem, with a long slender
stalk and a small secretory tip, the whole appearing clavate; young stems
puberulous or sparsely tomentellous. 28. H. macrophylla.
31. Glands arising from the bracts, each gland with a thick stalk and a large
secretory tip, flattened to form an expanded head; young stems with short
dense compact puberulence.