Is this a Gymea Lily?

I think this is a Gymea Lily, but am not sure.
This plant has several white flowers that come off a stalk that is not quite as long as the strappy leaves of this plant, which are just taller than me, at 170cm.
A plant book describes a Gymea Lily as having a very long spike, several metres, up to 5 or 6m, with red flowers on it. This description does not fit my plant.

The bulbs sprouted pretty efficiently, and out of 20, 15 sprouted, but I got 5 white plants that would not grow bigger than 15cm tall, due to lack of choloplasts?
I have only seen one flowering of this lily, as have only been at this house for 2 years.
Would anyone know what the cause of the white leaved lilies is, as well?

 

Looks and sounds like a spider lily (Crinum).

 

Definately NOT a Gymea Lily.

 

Looks like Crinum Pedunculatum (Swamp Lily) to me. Native to New South Wales, Australia

 

Flower of lily in question

Here is the flower that just came out a week ago when I took the photo.
I am in Biloela Queensland, spring time, and we just got a lot of rain, thankfully.

 

Hi there I have a plant that looks a lot like yours and it is part of the yucca familly it will grow a tall stalk or more depending on the size and age of the plant it will have very large beautifull flowers that smell amazing

 

Above picture of inflorescence shows that it is, in fact a crinum and therefore not a yucca.

 

The flower looks similar to Crinum asiaticum, but the plant is way larger.......

 

glad to hear you found what it was and has it bloomed yet ???