Psiadia, commonly known as daisy trees, is a genus of mostly woody Asian and African plants in the tribe Astereae within the family Asteraceae. The name comes from the Greek /psiás, /psiádos "drop", as the leaves of the species Psiadia glutinosa, for which Jacquin created the genus, seem covered with dewdrops. The genus is distributed throughout the Western Indian Ocean, with species reported from continental Eastern Africa, Madagascar, Mauritius, La Reunion, Rodrigues, the Comoro islands, as well as several of the smaller, uninhabited islands in the Mozambique Channel. Additional species are suspected on Socotra and Sri Lanka, but these have not been confirmed. Phylogenetic studies using DNA sequence data and biogeographic reconstruction using molecular dating have shown that the genus originated on the African mainland, and colonized Madagascar and the outlying islands in the Indian Ocean in several independent instances of overwater dispersal in the Miocene.

1. Species

2. Psiadia agathaeoides

3. Psiadia ageratoides

4. Psiadia alticola

5. Psiadia altissima

6. Psiadia amygdalina

7. Psiadia anchusifolia

8. Psiadia angustifolia

9. Psiadia argentea

10. Psiadia arguta

11. Psiadia aspera

12. Psiadia boivinii

13. Psiadia cacuminum

14. Psiadia callocephala

15. Psiadia canescens

16. Psiadia cataractae

17. Psiadia ceylanica

18. Psiadia coarctata

19. Psiadia coursii

20. Psiadia decaryi

21. Psiadia dentata

22. Psiadia depauperata

23. Psiadia dimorpha

24. Psiadia dracaenifolia

25. Psiadia flavocinerea

26. Psiadia glutinosa

27. Psiadia godotiana

28. Psiadia grandidentata

29. Psiadia hendersoniae

30. Psiadia hispida

31. Psiadia humilis

32. Psiadia inaequidentata

33. Psiadia incana

34. Psiadia insignis

35. Psiadia laurifolia

36. Psiadia leucophylla

37. Psiadia lithospermifolia

38. Psiadia lucida

39. Psiadia marojejyensis

40. Psiadia mauritiana

41. Psiadia melastomoides

42. Psiadia minor

43. Psiadia mollissima

44. Psiadia montana

45. Psiadia nigrescens

46. Psiadia pascalii

47. Psiadia penninervia

48. Psiadia pollicina

49. Psiadia pseudonigrescens

50. Psiadia punctulata

51. Psiadia quartziticola

52. Psiadia retusa

53. Psiadia rivalsii

54. Psiadia rodriguesiana

55. Psiadia salaziana

56. Psiadia salviifolia

57. †Psiadia schweinfurthii

58. Psiadia sericea

59. Psiadia serrata

60. Psiadia tanala

61. Psiadia tardieuana

62. Psiadia terebinthina

63. Psiadia tsaratananensis

64. Psiadia vestita

65. Psiadia viscosa

66. Formerly included

see: Conyza Microglossa Pluchea

References