Otto froebel x macrophylla. Plant moderately tall; robust; upright. Foliage intermediate between the two parents, but not so coarse as in macrophylla. Flowers medium in size, single, pink, somewhat like Lemoine’s Wittmanniana hybrid Avant Garde; but Harbinger blooms with me a week earlier than Avant Garde, In my latitude where the first sinensis blooms come about June 10-15, Harbinger opens about May 18-25. Desirable for its extreme earliness and its good quality.