]> [author note: Herbarium and types: Concarneaux Lab. Zool., PC; additional material at B, BM, BP, C, FH, KIEL, L, LD, MPU, NTM, NY, PCS, S, TCD, WRSL] Botany Crouan, Pierre Louis Crouan, Pierre Louis P. L. Crouan P. Crouan Pierre Louis Crouan 1798 1871