My second L. oxypetalum started flowering the other day. The form of the petals is better than the first one in flower and the color is better. The inside of the petals is less pale lemon color, but is a mix of lemon/purple. The purple shading on the outside of the flower is more pronounced on this one.
Also, my L. matangense are flowering - I only have two this year. The flowers are tiny, they about the size of a quarter (2 cm diameter). The form of the plant and its foliage is very grass-like. The seedlings took three years from seed (planted spring of 2018); I got the seeds from Chinese Alpines.