Pappochroma
Raf.Rhizomatous, rosetted perennial herbs; indumentum of simple eglandular and/or glandular hairs, or plants glabrous. Leaves usually toothed to some degree. Capitula terminal, pedunculate (but sometimes shortly so), solitary; involucral bracts in 2–4 rows, herbaceous. Ray florets female, in 1–2 rows, white to purple, style branches smooth to papillose; disc florets bisexual, corolla 5 (rarely 4)-lobed, yellow, anthers obtuse at base, with a short, acute, membranous terminal appendage, style branches with small conical protuberances. Cypselas flattened, glabrous or pubescent, marginal ribs thickened; pappus bristles free, barbellate, in a single series.
An endemic Australian genus of 9 species.
Previously included in Erigeron based on their persistent barbellate pappus and conspicuous ray florets. Neesom (1998) suspected Pappochroma of being closer related to the Australian genus Lagenophora based on an alleged similarity of their cypselas which are both supposed to have narrowed glandular apices. DNA data has also demonstrated a close relationship between Pappochroma nitidum and some Australian genera of the tribe Astereae including Lagenophora and Olearia (Cross et al. 2002). Erigeron possesses conspicuous orange resin ducts in the involucral bracts, disc corollas and cypselas, which Pappochroma does not further supporting their exclusion from Erigeron (Neesom 1998).
SpinningNesom, G.L. (1998). Full constitution of the Australian genus Pappochroma (Asteraceae: Astereae). Phytologia 85: 276–279.