Oligomeris

Cambessèdes in V. Jacquemont

in V. Jacquemont, Voy. Inde 4(Bot.): 23. 1839.

Common names: Whitepuff
Etymology: Greek oligos, few, and meros, part, alluding to fewer stamens and petals than in other genera of family
Treatment appears in FNA Volume 7. Treatment on page 190.
Revision as of 23:55, 27 May 2020 by imported>Volume Importer

Herbs, annual [biennial], or perennial. Stems erect to ascending, branched basally. Leaves not rosulate; alternate (sometimes fasciculate); petiolate, petiole shorter than blade, winged; blade margins usually entire, sometimes toothed near base, teeth 1–2, hyaline. Inflorescences usually dense spikes (or spikelke racemes). Pedicels absent or nearly so. Flowers: sepals persistent, 2–4(–5), distinct, equal; petals 2–3[–5], distinct or basally connate, margins entire or shallowly incised; intrastaminal nectary-discs absent; stamens 3–4[–10]; filaments persistent, distinct or basally connate; ovaries 4(–5)-carpelled. Capsules erect, angled, subglobose to obovoid, walls membranous. Seeds smooth (glossy). x = 15.

Distribution

sw North America, n Mexico, sw, c Asia, n, s Africa, n Atlantic Islands.

Discussion

Species 3 (1 in the flora).

Molecular research has shown that Oligomeris is a monophyletic group nested within Reseda in tribe Resedeae and sister to Reseda sect. Glaucoreseda (S. Martín-Bravo et al. 2007). Nonetheless, it seems preferable to maintain the genus; it has clear-cut diagnostic morphological characteristics. Hyaline teeth at the base of the leaves may be vestiges of a laminar segmentation of the leaves (F. Weberling 1968); some have interpreted the teeth as stipular.

Selected References

None.

... more about "Oligomeris"
Santiago Martín-Bravo +, Gordon C. Tucker +  and Thomas F. Daniel +
Cambessèdes in V. Jacquemont +
Whitepuff +
sw North America +, n Mexico +, sw +, c Asia +, n +, s Africa +  and n Atlantic Islands. +
Greek oligos, few, and meros, part, alluding to fewer stamens and petals than in other genera of family +
in V. Jacquemont, Voy. Inde +
Oligomeris +
Resedaceae +