Poteridium Spach (Q4187)

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Poteridium is a taxon with the rank genus within the tribe Sanguisorbeae
Language Label Description Also known as
English
Poteridium Spach
Poteridium is a taxon with the rank genus within the tribe Sanguisorbeae

    Statements

    taxon/id/Poteridium Spach
    0 references
    Poteridium Spach
    Poteridium
    FNA Editorial Committee. 2014. Flora of North America north of Mexico. Volume 9: Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York.
    accepted
    American burnet (English)
    North America
    Stems 1–10+, ascending to erect, freely branched, glabrous or sparsely pubescent.
    Leaves deciduous, basal and cauline (basal usually withering before or at flowering);
    stipules persistent, adnate to petiole, those of basal leaves simple, lanceolate, entire, of cauline pectinately divided;
    blade oblanceolate to obovate, 2–7 cm, herbaceous, leaflets 3–8 pairs, proximally alternate, subopposite, or opposite, distally subopposite or opposite, broadly elliptic to obovate, margins flat, pectinately pinnatisect (segment margins nearly parallel), faces glabrous.
    Inflorescences terminal, also often axillary to distal leaves, 12–100+-flowered, headlike spikes, cylindric, or subglobose when poorly developed, glabrous or nearly so;
    peduncles present, sometimes absent;
    bracteoles present.
    Flowers 1–3 mm diam.;
    hypanthium urceolate, compressed at mouth, 1–3 mm, glabrous;
    sepals 4, ascending to spreading, ovate, margins scarious;
    stamens 2 (and opposite inner sepals) or 4, equal to sepals;
    carpel 1, glabrous, styles repeatedly branched, brushlike.
    Fruits achenes, 1, globose, 1.5–2 mm diam., glabrous;
    hypanthium persistent, enclosing achenes;