87 
described by various investigators. The different types of this 
anomaly are too well-known to require discussion.* The terato- 
logical specimen of Argemone platyceras shown in the accompany- 
ing photograph was found growing in a field near Austin, Texas, 
May 21, тото. But a single individual exhibiting the anomaly 
was observed, and although many field trips have since inci- 
Fic. 2. Asingle pistillodium. Explanation in text. 
dentally taken me through fields covered with this plant, casual 
observation has not so far revealed other specimens. I am con- 
vinced therefore that the occurrence of this condition is extremely 
rare in this species, although it is known to be of common occur- 
rence among the Papaveraceae. All of the flowers of this indi- 
vidual are anomalous. The stamens are all changed to pistillodia, 
the petals are completely suppressed, and the pistil reduced to a 
* DeVries, Hugo, Species and Varieties, Their Origin by Mutation, Chapter 
XIII, Pistillody in shi gum 1906. Master-Dammer, Vegetable Teratology. 
Schilberszky, K., Adotsk a Virag szaporadi szerveinek rendellenes szerkezeteher. 
Beiträge zur aaa Structur der productiven Organe der Blüthe. (Abhandl. 
a. d. Geb. der Naturw., Herausg. v. d. Ung. Wiss. Akad., Bd. XXII, No. 4, 79 p 
Mit 7 Taf. Budapest, 1892. Review in Just’s Botanischer Jahresbericht 1: 
465. 1892.) 
