Sipapoantha

<<<Flowers>Calyx>Apex>Shape

acute or obtuse1

1. 004-002-005-001

<<<Flowers>Calyx>Fusion>Relative distance

up to 2/3 of total length2

2. 004-002-001-001

<<<Flowers>Calyx>Lobes>Shape

oblong or circular3

3. 004-002-004-001

<<<Flowers>Corolla>Fusion>Relative distance

1/2-2/3 of total length4

4. 004-004-001-001

<<<Flowers>Stamens>Anthers>Shape

lanceolate5

5. 004-006-002-001

<<<Flowers>Stamens>Filaments>Shape

winged at base6

6. 004-006-001-001

<<<Fruits>Seeds>Testa>Shape

concave7

7. 005-001-003-001

<<Flowers>Calyx>Apex

apex ;8

8. 004-002-005

<<Flowers>Calyx>Fusion

fused9

9. 004-002-001

<<Flowers>Calyx>Lobes

lobes , somewhat keeled,10

10. 004-002-004

<<Flowers>Calyx>Shape

campanulate11

11. 004-002-003

<<Flowers>Calyx>Texture

coriaceous12

12. 004-002-002

<<Flowers>Corolla>Fusion

fused13

13. 004-004-001

<<Flowers>Corolla>Length

90-100 mm long14

14. 004-004-003

<<Flowers>Corolla>Shape

thin, funnel-shaped15

15. 004-004-002

<<Flowers>Pistil>Stigma

stigma broadly bilamellate (corolla, stamen and pistil characters not known for S. obtusisepala).16

16. 004-008-001

<<Flowers>Stamens>Anthers

anthers , with sterile apical appendage;17

17. 004-006-002

<<Flowers>Stamens>Filaments

filaments widened and ,18

18. 004-006-001

<<Fruits>Seeds>Diameter

0.2-0.8 mm in diam.19

19. 005-001-002

<<Fruits>Seeds>Shape

angular, roughly cuboidal or conical20

20. 005-001-001

<<Fruits>Seeds>Testa

testa cells with band-like thickenings.21

21. 005-001-003

<<Leaves>Secondary veins>Secondary vein number

1-222

22. 002-001-001

<Flowers>Androecium

androecium zygomorphic with stamens and style bent toward bottom of corolla mouth;23

23. 004-005

<Flowers>Calyx

calyx , , ,24

24. 004-002

<Flowers>Corolla

corolla , , , deciduous in fruit;25

25. 004-004

<Flowers>Corolla bud apex

corolla bud apex bluntly tapering,26

26. 004-003

<Flowers>Merosity

5-merous27

27. 004-001

<Flowers>Pistil

pistil with nectary disk,28

28. 004-008

<Flowers>Pollen

pollen in tetrads with pilate to verrucose exine (see Nilsson, 2002);29

29. 004-007

<Flowers>Stamens

stamens inserted near base of corolla tube, of unequal length,30

30. 004-006

<Fruits>Seeds

seeds , ,31

31. 005-001

<Habit>Texture

woody32

32. 001-001

<Inflorescences>Bracts and bracteoles

bracts and bracteoles scale-like or leaf-like near base of inflorescence.33

33. 003-004

<Inflorescences>Dichasial branching point number

1-234

34. 003-002

<Inflorescences>Monochasial branch number

2 or more35

35. 003-003

<Inflorescences>Position

terminal36

36. 003-001

<Leaves>Secondary veins

secondary veins .37

37. 002-001

Description

Herbs or woody shrubs. Leaves sessile or petiolate; secondary veins 1-2. Inflorescences terminal cymes, with 1-2 dichasial branching points terminating in 2 or more monochasial branches; bracts and bracteoles scale-like or leaf-like near base of inflorescence. Flowers pedicellate, 5-merous, somewhat ventricose (flowers not seen for S. obtusisepala); calyx fused up to 2/3 of total length, coriaceous, campanulate, lobes oblong or circular, somewhat keeled, apex acute or obtuse; corolla bud apex bluntly tapering, corolla fused 1/2-2/3 of total length, thin, funnel-shaped, 90-100 mm long, deciduous in fruit; androecium zygomorphic with stamens and style bent toward bottom of corolla mouth; stamens inserted near base of corolla tube, of unequal length, filaments widened and winged at base, anthers lanceolate, with sterile apical appendage; pollen in tetrads with pilate to verrucose exine (see Nilsson, 2002); pistil with nectary disk, stigma broadly bilamellate (corolla, stamen and pistil characters not known for S. obtusisepala). Fruits a capsule, with persistent calyx and deciduous corolla; seeds angular, roughly cuboidal or conical, 0.2-0.8 mm in diam., testa cells concave with band-like thickenings.

Distribution

Guyana present, Southern America: Venezuela (Venezuela present), mountain peaks on the border of Brazil and Guyana present, the tepui mountains of the western part the Guayana Highlands present

On the tepui mountains of the western part the Guayana Highlands in Venezuela and on mountain peaks on the border of Brazil and Guyana; 2 species, of which 1 species presumably in Guyana.

Flowers

Flowers pedicellate, , somewhat ventricose (flowers not seen for S. obtusisepala);38

38. 004

Fruits

Fruits a capsule, with persistent calyx and deciduous corolla;39

39. 005

Habit

Herbs or shrubs.40

40. 001

Inflorescences

Inflorescences cymes, with dichasial branching points terminating in monochasial branches;41

41. 003

Leaves

Leaves sessile or petiolate;42

42. 002

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