1. Some Peruvian Convolvulaceae with a new variety. In: J. F. Macbride, Spermatophytes, mostly Peruvian III. Publications Field Museum of Nat. Hist., Bot. Series 11, 1, publ. 288, p. 3—4. 2. Vergroening bij Dahlia. Natura, p. 211—212, 1 fig.