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FNA | Family List | FNA Vol. 9 | Rosaceae

4c6. Rosaceae Jussieu (subfam. Amygdaloideae) tribe Sorbarieae Rydberg in N. L. Britton et al., N. Amer. Fl. 22: 239, 256. 1908.

Luc Brouillet

Shrubs; unarmed. Leaves alternate, sometimes opposite, pinnately compound (mature simple in Adenostoma); stipules persistent, free or adnate to petiole base, or reduced or absent (Adenostoma); venation pinnate. Flowers: perianth and androecium perigynous; epicalyx bractlets absent; hypanthium funnelform, cup-shaped, or campanulate to cylindric; torus absent; carpels 1–5, basally connate or distinct (sometimes appearing connivent at base), free, styles terminal or lateral, distinct; ovules 1, basal, or 2 and collateral, 4–8, or 10–12 in 2 series, declining. Fruits achenes or aggregated follicles; styles persistent or not, not elongate.

Genera 4, species 9 (3 genera, 5 species in the flora): North America, nw Mexico, Eurasia.

The base chromosome number for Sorbarieae is x = 9. Spiraeanthus Maximowicz, with one species native to central Asia, also belongs here.

1 Leaves simple (juvenile pinnatifid); stamens 10 or 15; fruits achenes within hypanthium.   41 Adenostoma, p. xxx
+ Leaves pinnately compound; stamens 17–110; fruits aggregated follicles   (2)
2 (1) Leaves persistent, 1(–)2-pinnate-pinnatifid, leaflet margins entire or secondarily toothed-lobed; plants 6–20 dm.   42 Chamaebatiaria, p. xxx
+ Leaves deciduous, odd-pinnately compound, leaflet margins usually doubly serrate; plants 10–70 dm.   43 Sorbaria, p. xxx

Lower Taxa


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