Droseraceae

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Droseraceae

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<<<Flowers>Ovary>Carpels>Carpel number

generally 31
1. 006-006-002-001

<<<Flowers>Ovary>Style>Style number

3-52
2. 006-006-004-001

<<<Flowers>Stamens>Filaments>Shape

filiform, terete3
3. 006-004-002-001

<<<Leaves>Blade>Margins>Hairs

covered with glandular hairs4
4. 004-004-003-001

<<Flowers>Ovary>Carpels

carpels , united,5
5. 006-006-002

<<Flowers>Ovary>Hairs

glabrous6
6. 006-006-001

<<Flowers>Ovary>Placentation

placentation parietal,7
7. 006-006-003

<<Flowers>Ovary>Stigma

stigmas tapered or swollen, often papillose.8
8. 006-006-005

<<Flowers>Ovary>Style

styles , usually partite at base or unbranched, rarely united, often further dividing distally,9
9. 006-006-004

<<Flowers>Petals>Colour

white or pink, rarely yellow10
10. 006-003-001

<<Flowers>Petals>Shape

spathulate or obovate11
11. 006-003-003

<<Flowers>Petals>Texture

membranaceous12
12. 006-003-002

<<Flowers>Stamens>Anthers

anthers usually bilocular;13
13. 006-004-003

<<Flowers>Stamens>Filaments

filaments ,14
14. 006-004-002

<<Flowers>Stamens>Stamen number

generally 515
15. 006-004-001

<<Fruits>Seeds>Cotyledons

cotyledons minute.16
16. 007-002-003

<<Fruits>Seeds>Embryo

embryo embedded in copious endosperm, rich in starch, oil and protein,17
17. 007-002-002

<<Fruits>Seeds>Seed number

numerous (few in some extra-Neotropical species)18
18. 007-002-001

<<Inflorescences>Bracts>Colour

green, red19
19. 005-003-001

<<Inflorescences>Bracts>Texture

scarious20
20. 005-003-002

<<Inflorescences>Peduncle>Hairs

with glandular hairs, non-glandular hairs or glabrous (also in bracts, pedicels and sepals)21
21. 005-002-002

<<Inflorescences>Peduncle>Length

up to 20 cm long22
22. 005-002-001

<<Leaves>Blade>Margins

margin .23
23. 004-004-003

<<Leaves>Blade>Shape

linear24
24. 004-004-002

<<Leaves>Blade>Texture

membranaceous25
25. 004-004-001

<<Leaves>Petiole>Hairs

hairy or glabrous26
26. 004-003-001

<Flowers>Merosity

5-merous27
27. 006-001

<Flowers>Ovary

ovary superior, ,28
28. 006-006

<Flowers>Petals

petals free, , , , usually persistent;29
29. 006-003

<Flowers>Pollen

pollen generally released in tetrads, generally spinulose;30
30. 006-005

<Flowers>Sepals

sepals joined at base or free;31
31. 006-002

<Flowers>Stamens

stamens ,32
32. 006-004

<Fruits>Seeds

seeds ,33
33. 007-002

<Fruits>Texture

papery34
34. 007-001

<Inflorescences>Bracts

bracts minute, or ;35
35. 005-003

<Inflorescences>Pedicels

pedicels present.36
36. 005-004

<Inflorescences>Peduncle

peduncle slender, , ;37
37. 005-002

<Inflorescences>Position

terminal, rarely lateral38
38. 005-001

<Leaves>Blade

blade , to circular,39
39. 004-004

<Leaves>Hairs

covered with glandular hairs40
40. 004-001

<Leaves>Petiole

petiole grading into blade or well defined, ;41
41. 004-003

<Leaves>Stipules

stipules intrapetiolar (lateral or absent in some extra-Guianan species);42
42. 004-002

<Stems>Length

0.1-30 cm43
43. 003-001

Description

Annual or perennial insectivorous herbs. Roots adventitious (some extra-neotropical species with tubers). Stems 0.1-30 cm, aerial (subterranean in some extra-neotropical species). Leaves generally stipulate, alternate, simple (variously lobed or peltate in some extra-neotropical species), covered with glandular hairs; stipules intrapetiolar (lateral or absent in some extra-Guianan species); petiole grading into blade or well defined, hairy or glabrous; blade membranaceous, linear to circular, margin covered with glandular hairs. Inflorescences terminal, rarely lateral, unbranched, one-sided or dichasial cymes, sometimes flowers solitary; peduncle slender, up to 20 cm long, with glandular hairs, non-glandular hairs or glabrous (also in bracts, pedicels and sepals); bracts minute, green, red or scarious; pedicels present. Flowers generally 5-merous, actinomorphic (zygomorphic in some extra-tropical species), hermaphrodite; sepals joined at base or free; petals free, white or pink, rarely yellow, membranaceous, spathulate or obovate, usually persistent; stamens generally 5, filaments filiform, terete, anthers usually bilocular; pollen generally released in tetrads, generally spinulose; ovary superior, glabrous, carpels generally 3, united, placentation parietal, styles 3-5, usually partite at base or unbranched, rarely united, often further dividing distally, stigmas tapered or swollen, often papillose. Fruits dehiscent (rarely indehiscent in extra-Neotropical species), papery capsules; seeds numerous (few in some extra-Neotropical species), embryo embedded in copious endosperm, rich in starch, oil and protein, cotyledons minute.

Distribution

Australasia, Cosmopolitan present, Neotropics present
Cosmopolitan with centre of diversity in Australia, 4 genera and ca. 120 species, the genus Drosera is the only one in the Neotropics.

Ecology

The Droseraceae is a family of insectivorous (carnivorous syndrome) herbs; commonly growing in bogs and other waterlogged soils; the carnivorous habit may be an evolutionary response to their growth in media containing little nitrogen.

Flowers

Flowers generally , actinomorphic (zygomorphic in some extra-tropical species), hermaphrodite;44
44. 006

Fruits

Fruits dehiscent (rarely indehiscent in extra-Neotropical species), capsules;45
45. 007

Habit

Annual or perennial insectivorous herbs.46
46. 001

Individuals Association

Guyana, Abbensetts, N.J. 11 Guyana, Liesner, R. 23237 Sastre, C. 1322 Guyana, Maas, P.J.M. et al. 4346 Guyana, Maguire, B. et al. 32286 Sastre, C. 11 Suriname, Lanjouw, J. & J.C. Lindeman 852 Suriname, Lanjouw, J. & J.C. Lindeman 686 Suriname, Maguire, B. et al. 25035 Suriname, Maas, P.J.M. 3310 Guyana, Smith, A.C. 2301 Guyana, Maas, P.J.M. et al. 5660 Guyana, Cook, C.D.K. 179 Guyana, Cook, C.D.K. 87 Guyana, Ule, E.H.G. 8610 Guyana, Maas, P.J.M. et al. 4268 Suriname, Donselaar, J. van 739 Guyana, Jansen-Jacobs, M.J. et al. 2744 Suriname, Jansma, R. 25 Suriname, without col. Suriname, Donselaar, J. van 2973 Suriname, Kuyper, J. 16 Guyana, Maas, P.J.M. et al. 3682 Leprieur, F.R. 145 Guyana, Jansen-Jacobs, M.J. et al. 5023 Guyana, Maguire, B. et al. 45980-A Guyana, Jenman, G.S. 1293 Suriname, Lanjouw, J. & J.C. Lindeman 944 Guyana, without col. Guyana, Maguire, B. et al. 40645 Guyana, Jansen-Jacobs, M.J. et al. 2743 Guyana, Jansen-Jacobs, M.J. et al. 5040 Guyana, Jansen-Jacobs, M.J. et al. 455 Suriname, Lanjouw, J. & J.C. Lindeman 587 Guyana, Tillett, S.S. et al. 44887 Suriname, Florschütz, P.A. et al. 1986 Gentry, A. & E. Zardini 50330 Guyana, Maas, P.J.M. et al. 4022 Suriname, Kramer, K.U. & W.H.A. Hekking 3260 Guyana, McConnell, F.V. & J.J. Quelch 154 Suriname, Florschütz, P.A. et al. 799 Guyana, Jansen-Jacobs, M.J. et al. 3680 Suriname, Heyligers, P.C. 365 Guyana, Maas, P.J.M. et al. 7619 Guyana, Appun, C.F. 1157 Suriname, Donselaar, J. van 406 Suriname, Kramer, K.U. & W.H.A. Hekking 2938 Suriname, Maguire, B. et al. 24432 Guyana, Thurn, E.F. im 313 Guyana, Jenman, G.S. 3769 Guyana, Jansen-Jacobs, M.J. et al. 3157 Suriname, Lanjouw, J. 146 Suriname, Florschütz, P.A. et al. 1984 Guyana, Maas, P.J.M. et al. 5740 Suriname, Kramer, K.U. & W.H.A. Hekking 33280 Guyana, Wilson-Browne, G. 279 Suriname, Maguire, B. et al. 24486 Guyana, Pipoly, J.J. et al. 11133 Guyana, Maas, P.J.M. et al. 5659 Guyana, Maguire, B. et al. 23466 Suriname, Lanjouw, J. & J.C. Lindeman 903 Guyana, McConnell, F.V. & J.J. Quelch 681 Suriname, Teunissen, P.A. et al. LBB 11495 Cremers, G. et al. 9544 Guyana, Maas, P.J.M. et al. 4398 Guyana, Jenman, G.S. 2255 Guyana, Maas, P.J.M. et al. 5529 Guyana, Maguire, B. et al. 32517 Suriname, Maas, P.J.M. 3202 Suriname, Geijskes, D.C. s. n. Suriname, Florschütz, P.A. et al. 247 Guyana, Hahn, W. et al. 5509 Guyana, Maguire, B. et al. 45979-A Guyana, Cruz, J.S. de la 4012 Suriname, Florschütz, P.A. et al. 622 Suriname, Jansma, R. 37 Suriname, Donselaar, J. van 2938 Suriname, Teunissen, P.A. et al. LBB 12169 Guyana, Maas, P.J.M. et al. 7717 Donselaar, J. van 2595 Guyana, Hahn, W. et al. 4468 Guyana, Jansen-Jacobs, M.J. et al. 1392 Suriname, Lanjouw, J. & J.C. Lindeman 855 Guyana, without col. Suriname, Donselaar, J. van 3664 Guyana, Jenman, G.S. 912 Suriname, Kramer, K.U. & W.H.A. Hekking 3041 Guyana, Schomburgk, Ro., ser. I 102 Cremers, G. et al. 10683

Inflorescences

Inflorescences , unbranched, one-sided or dichasial cymes, sometimes flowers solitary;47
47. 005

Leaves

Leaves generally stipulate, alternate, simple (variously lobed or peltate in some extra-neotropical species), ;48
48. 004

Roots

Roots adventitious (some extra-neotropical species with tubers).49
49. 002

Stems

Stems , aerial (subterranean in some extra-neotropical species).50
50. 003

Uses

Aldrovandra, Dionaea, Drosophyllum and several Drosera's from the Old World are grown, usually in greenhouses as curiosities and as ornamental plants.