Pontania with Type III galls [Smith does not name or describe a species and is ambiguous about whether he considers these host varieties or distinct species on each host.]

[A cross sectional drawing appears in Figure 4, on page 5 of the pdf]

Type III galls are attached to the S. myrtillifolia Andersson-glauca L.-phylicifolia L. complexes, and apparently equivalent to part of the P. vesicator (Bremi) group of Benson. The gall is large and oval (10 mm), and protrudes through both leaf surfaces from the midrib. It has slightly irregular, moderately thick walls, and a smooth surface which may be lightly pilose in those incited on the S. myrtillifolia and S. glauca complexes, or shiny and glabrous when on the S phylicifolia complex.

- Edward L Smith: (1970) Biosystematics and morphology of Symphyta. II. Biology of gall-making nematine sawflies in the California region^©