Difference between revisions of "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.
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Revision as of 20:21, 24 September 2019

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 +