is it Clematis fremontii ?

[Véronique Macrelle]

is it Clematis fremontii?

 first flowering of this  very squatsmall Clematis,high 20 cm.

[Afloden]

This looks correct for fremontii. It often has upward facing flowers when growth is really quick in the spring. It can vary a lot in sepal color from dark purple-blue to near white.

[Véronique Macrelle]

Thank you for your reply..
 I have other seedlings younger from another source, maybe they will be different ... (flowers in 2 or 3 years ..., it's long to come
 I found the peduncle and the flower very short and it seems to me that 2 flowers are preparing side: it may be more typical