Wednesday, September 15, 2021

Family | Apocynaceae | Dogbanes

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 Taxonomy_______________________________

The five subfamilies in the dogbane family are:
  • Apocynoideae
  • Asclepiadoideae
  • Periplocoideae
  • Rauvolfioideae
  • Secamonoideae


Apocynoideae____________________________

Mandevilla


Mandevilla



Mandevilla




Mandevilla



Mandevilla



Mandevilla




Mandevilla


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Oleander, Nerium oleander
Oleander, Nerium oleander



Oleander, Nerium oleander


Oleander, Nerium oleander






Asclepiadoideae____________________________

FWBG, BRIT, Fort Worth, Texas                                                                                              Photograph: Jeanette Hyden
Green Milkweed, Antelope horn milkweed  (Asclepias viridis)

FWBG, BRIT, Fort Worth, Texas                                                                     Photograph: Jeanette Hyden
Green Milkweed, Antelope horn milkweed  (Asclepias viridis)
A silky, hair-like structure assists in dispersing the seeds

 when the pods break open.

The most common methods of seed dispersal for plants are wind, water, animals, explosion and fire. When the milkweed follicle breaks open the seeds are transported by the wind as the breeze blows the hairlike comas to more distant locations.

The Milkweed flower is called an umbellate cymes




The milkweed seedpod is known as a follicle




The milkweed seedpod is known as a follicle



The seeds, each with long, white flossy hairs (coma), occur in the follicle seedpod and are dispersed after the pod breaks open and the wind carries the seed away.

















































































Rauvolfioideae_______________________________

Vinca 
Variegated Common Periwinkle (Vinca minor 'Variegata')


Variegated Common Periwinkle (Vinca minor 'Variegata')



Amsonia

Blue Star flower buds (Amsonia)
 Plumeria
Frangipani (Plumeria)

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