Bouquet with Protea and eucalyptus.
Preview made in V-Ray.
All materials textures and objects have corresponding names in English.
The model was created in the 2016 version and V-Ray 3.60 re-saved in the 2014 version and V-Ray 2.40 Corona 1.7. All materials are verified. Objects are logically grouped.
Polys: 97 971
Verts: 55 184 (with Turbosmooth off)
applied modifier Turbosmooth (Viewport Itterations: 0 Render Itterations: 2) via Instance.
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The protea flower uses the Hair & Fur modifier. It will be turned on by default. If you don`t plan to use the bouquet for distant angles it is advisable to turn it off on the following objects: Protea_center_001 Protea_center_002 Protea_center_003 as well as on any of the Edge_xxx (here it is applied via Instance).

In V-Ray to render the villi turn on the mr prim mode in the Environments & Effects tab.
In Corona enable Geometry mode in the Environments & Effects tab.
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Obj format does not contain Hair & Fur and Turbosmooth modifiers. Screenshots with Hair & Fur modifier settings for the villi of the center of the flower and villi at the edges are included in the model folder. Also for all Edges_xxx objects go to the Object Properties tab and turn off the Renderable checkbox.
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For Corona render it is recommended to install at least version 1.5 as the glossiness of the materials is adjusted with PBR in mind.
Who works in V-Ray version lower than 3.1 be careful in the materials in the BRDF section there is Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable for you.