Hippeadtrum equestre, variable form,. Can look like either one of the pics you posted

In the first image I would suspect hippeastrum rozeum or stylosum or rather some hybrid . Photo second: I know that in South-East Asia grow and sell \ circulate first old small flowered hippeastrum under the name "Gracilis".

But it or not - I can not say, probably not.

Thank you. I think they are in fact H. roseum and H. gracili. I think they could be hybrids. They are so beautiful. The small red flower is stunning in bunches!! They are growing in full sun, with no particular care in South India and blooming now..

Hi Radha, I have a similar one potted. Probably the same as your red one

Each flower is a bit larger than the palm of my hand. I always thought that was quite a large flower.... Didn't know that they can be larger!