Irlbachia

Primary tabs

Irlbachia

<<<Flowers>Calyx>Apex>Shape

obtuse to acute1
1. 004-002-005-001

<<<Flowers>Calyx>Calyx lobes>Keel

rarely with small keel2
2. 004-002-004-002

<<<Flowers>Calyx>Calyx lobes>Shape

elliptic, thickened and glandular dorsally3
3. 004-002-004-001

<<<Flowers>Calyx>Fusion>Relative distance

for ca. 1/5-1/2 of length4
4. 004-002-001-001

<<<Flowers>Corolla>Fusion>Relative distance

for ca. 1/2-2/3 of length5
5. 004-003-001-001

<<<Flowers>Stamens>Anthers>Shape

oblong to linear6
6. 004-005-002-001

<<<Flowers>Stamens>Connective apex>Shape

apiculate7
7. 004-005-003-001

<<<Fruits>Seeds>Testa>Shape

cupuliform and/or concave8
8. 005-001-002-001

<<Flowers>Calyx>Apex

apex ;9
9. 004-002-005

<<Flowers>Calyx>Calyx lobes

calyx lobes , ,10
10. 004-002-004

<<Flowers>Calyx>Fusion

fused from base11
11. 004-002-001

<<Flowers>Calyx>Shape

campanulate12
12. 004-002-003

<<Flowers>Calyx>Texture

coriaceous13
13. 004-002-002

<<Flowers>Corolla bud apex>Androecium

androecium zygomorphic with stamens and style bent towards bottom of corolla mouth14
14. 004-004-002

<<Flowers>Corolla bud apex>Shape

rounded15
15. 004-004-001

<<Flowers>Corolla>Fusion

fused at base16
16. 004-003-001

<<Flowers>Corolla>Length

4-33 mm long17
17. 004-003-003

<<Flowers>Corolla>Shape

salver- or funnel-shaped18
18. 004-003-002

<<Flowers>Pistil>Stigma

stigma bilamellate.19
19. 004-007-001

<<Flowers>Stamens>Anthers

anthers ,20
20. 004-005-002

<<Flowers>Stamens>Base

base of filaments without appendages,21
21. 004-005-001

<<Flowers>Stamens>Connective apex

connective apex ;22
22. 004-005-003

<<Fruits>Seeds>Shape

to globose23
23. 005-001-001

<<Fruits>Seeds>Testa

testa .24
24. 005-001-002

<<Leaves>Vein number>Vein number

1-5-veined25
25. 002-002-001

<Flowers>Calyx

calyx , , ,26
26. 004-002

<Flowers>Corolla

corolla , , ;27
27. 004-003

<Flowers>Corolla bud apex

corolla bud apex , ;28
28. 004-004

<Flowers>Merosity

5-merous29
29. 004-001

<Flowers>Pistil

pistil with nectary disk around base,30
30. 004-007

<Flowers>Pollen

pollen in polyads;31
31. 004-006

<Flowers>Stamens

stamens inserted in lower to middle part of corolla tube, of equal or unequal length,32
32. 004-005

<Fruits>Seeds

seeds ,33
33. 005-001

<Inflorescences>Bracts and bracteoles

bracts and bracteoles scale- or leaf-like.34
34. 003-002

<Inflorescences>Position

terminal35
35. 003-001

<Leaves>Length

1-15 cm long36
36. 002-001

<Leaves>Vein number

.37
37. 002-002

Description

Herbs. Leaves sessile or petiolate, 1-15 cm long; 1-5-veined. Inflorescences terminal, dichasial cyme with usually monochasial branches; bracts and bracteoles scale- or leaf-like. Flowers sessile or pedicillate, 5-merous, actinomorphic or slightly zygomorphic; calyx fused from base for ca. 1/5-1/2 of length, coriaceous, campanulate, calyx lobes elliptic, thickened and glandular dorsally, rarely with small keel, apex obtuse to acute; corolla fused at base for ca. 1/2-2/3 of length, salver- or funnel-shaped, 4-33 mm long; corolla bud apex rounded, androecium zygomorphic with stamens and style bent towards bottom of corolla mouth; stamens inserted in lower to middle part of corolla tube, of equal or unequal length, base of filaments without appendages, anthers oblong to linear, connective apex apiculate; pollen in polyads; pistil with nectary disk around base, stigma bilamellate. Fruit a capsule, with persistent calyx and persistent to late-deciduous corolla; seeds to globose, testa cupuliform and/or concave.

Distribution

Guayana Highlands on tepuis present, Guyana present, N Brazil present, SE Colombia present, lowland savannas in S Venezuela present
A genus with about 9 species in total, main distribution in the Guayana Highlands on tepuis or lowland savannas in S Venezuela, N Brazil, and SE Colombia; 2 species in Guyana.

Flowers

Flowers sessile or pedicillate, , actinomorphic or slightly zygomorphic;38
38. 004

Fruits

Fruit a capsule, with persistent calyx and persistent to late-deciduous corolla;39
39. 005

Habit

Herbs.40
40. 001

Inflorescences

Inflorescences , dichasial cyme with usually monochasial branches;41
41. 003

Leaves

Leaves sessile or petiolate, ;42
42. 002

Notes

The genus Irlbachia is here circumscribed following Maguire (1981) and Struwe et al. (2004). A larger circumscription including species of Chelonanthus, Calolisianthus, Helia, Rogersonanthus, and Tetrapollinia has earlier been advocated by Maas (1985; cf. Struwe & Albert, 1998, 1999), but is not supported by more recent phylogenetic results using molecular, morphological, and anatomical data (Struwe et al., 2004, 2008).