Difference between revisions of "Poterium"
Sp. Pl. 2: 994. 1753.
Gen. Pl. ed. 5, 430. 1754.
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|distribution=Europe (especially Mediterranean region);w Asia;n Africa;n Atlantic Islands (Macaronesia);introduced also in s South America;Australia. | |distribution=Europe (especially Mediterranean region);w Asia;n Africa;n Atlantic Islands (Macaronesia);introduced also in s South America;Australia. | ||
| + | |introduced=true | ||
|discussion=<p>Species 13 (1 in the flora).</p><!-- | |discussion=<p>Species 13 (1 in the flora).</p><!-- | ||
--><p><i>Poterium</i> is here circumscribed to include Bencomia Webb & Berthelot, Dendriopoterium Sventenius (all of Macaronesia), Marcetella Sventenius, and Sarcopoterium Spach (of the eastern Mediterranean) based on molecular phylogenetic analyses summarized by D. Potter et al. (2007). The inclusion of these woody Mediterranean and Macaronesian endemics significantly increases the morphological diversity in the genus; see also 25. <i>Sanguisorba</i>.</p> | --><p><i>Poterium</i> is here circumscribed to include Bencomia Webb & Berthelot, Dendriopoterium Sventenius (all of Macaronesia), Marcetella Sventenius, and Sarcopoterium Spach (of the eastern Mediterranean) based on molecular phylogenetic analyses summarized by D. Potter et al. (2007). The inclusion of these woody Mediterranean and Macaronesian endemics significantly increases the morphological diversity in the genus; see also 25. <i>Sanguisorba</i>.</p> | ||
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|publication year=1753;1754 | |publication year=1753;1754 | ||
|special status=Introduced | |special status=Introduced | ||
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|subfamily=Rosaceae subfam. Rosoideae | |subfamily=Rosaceae subfam. Rosoideae | ||
|tribe=Rosaceae tribe Agrimonieae | |tribe=Rosaceae tribe Agrimonieae | ||
Latest revision as of 22:57, 5 November 2020
Herbs, perennial [unarmed or thorny shrubs], 1–8[–40] dm; rhizomatous [taprooted]. Stems 1–10+, ascending to erect, glabrescent to loosely villous [glabrous]. Leaves deciduous [persistent], basal and/or cauline; stipules persistent, adnate to petiole or free, lanceolate to ovate, margins entire or serrate; petiole present; blade oblanceolate to obovate [or elliptic], 1–15[–35] cm, herbaceous [subcoriaceous], leaflets 2–12 pairs, elliptic, orbiculate, or obovate, margins flat, crenate, serrate, or incised, surfaces glabrous or hairy hairs unicellular to multicellular, acicular and/or gland-tipped. Inflorescences terminal [or axillary] to distal leaves, [15–]20–100+-flowered, headlike spikes, glabrous or sparsely [to densely] pubescent; peduncles present, sometimes absent; bracts absent; bracteoles present. Pedicels absent. Flowers bisexual or pistillate (plants gynomonoecious [dioecious]), 2–4[–5] mm diam.; hypanthium dry [fleshy, spongy], top-shaped, ellipsoid, or nearly orbicular, 2–9 mm, angled, winged, and/or ornamented with irregular flanges and papillae, tan to brown, hairy or glabrous; sepals 4, distinct [basally connate], usually ascending or spreading, rarely slightly reflexed, ovate to elliptic; petals 0; stamens 0–30(–50), shorter or longer than sepals; carpels [1 or]2(or 3), glabrous, styles repeatedly branched, brushlike. Fruits achenes, 1 or 2[or 3], ellipsoid, 1.5–2 mm diam., glabrous (though reticulate and muricate); hypanthium persistent, enclosing achenes; sepals persistent, spreading to slightly ascending. x = 7.
Distribution
Introduced; Europe (especially Mediterranean region), w Asia, n Africa, n Atlantic Islands (Macaronesia), introduced also in s South America, Australia.
Discussion
Species 13 (1 in the flora).
Poterium is here circumscribed to include Bencomia Webb & Berthelot, Dendriopoterium Sventenius (all of Macaronesia), Marcetella Sventenius, and Sarcopoterium Spach (of the eastern Mediterranean) based on molecular phylogenetic analyses summarized by D. Potter et al. (2007). The inclusion of these woody Mediterranean and Macaronesian endemics significantly increases the morphological diversity in the genus; see also 25. Sanguisorba.