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22. Seriphidium (Besser ex Hook.) Fourr., Ann. Soc. Linn. Lyon II. 17: 89. 1869; Poljakov in Trudy Inst. Bot. Akad. Nauk. Kazakh. SSSR 11: 171. 1961; K.Bremer & Humphries in Bull. Nat. Hist. Mus. Lond. (Bot.) 23(2): 117.1993; K.Bremer, Asteraceae 117. 1994.
Artemisia sect. Seriphidium Besser ex Hook. in Bull. Soc. Nat. Mosc.1: 222. 1828; DC., Prodr. 6: 100. 1837; Hook. f., Fl. Brit. Ind. 3: 323. 1881; Artemisia subgen. Seriphidium (Besser) Rouy, Fl. Fr. 8: 298. 1903; Poljakov in Schischk. & Bobrov., Fl. USSR 26: 645. 1995 (Engl. Tr.); Podlech in Rech. f., Fl. Iran. Comp. IV. 158: 192. 1986.
Perennial or annual, usually strongly bitter aromatic herbs or shrublets with alternate, 1-3-pinnatisect leaves. Capitula discoid, homogamous, small and few-flowered, oblong, numerous in long panicles. Involucre oblong, 4-7-seriate, phyllaries unequal, imbricate, the outermost short and obtuse, the inner gradually longer and linear to linear-oblong. Receptacle conical, 2-3 mm long, usually acute, glabrous. Flowers bisexual, up to 15 per capitulum. Corolla yellow to purple, tubular, 5-toothed. Anthers with linear-lanceolate terminal appendages. Cypselas small, obovoid to ellipsoid, ± flattened or triquetrous, thin-walled. Pappus absent.
A moderate-sized genus comprising c. 135 species, distributed in Europe, and temperate Asia with main center of diversity in Central Asia, a few species in N America. Represented in Pakistan by 13 species.
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| 1 |
Leaves unipinnatisect. |
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1 Seriphidium freitagii |
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Leaves bi- or tripinnatisect. |
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(2) |
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| 2 (1) |
Stem at anthesis dark, violaceous-brown, glossy glabrous. |
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2 Seriphidium turanicum |
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Stem greyish or whitish to pale, variously hairy, rarely glabrous or ± purplish tinged. |
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(3) |
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| 3 (2) |
Capitula in 1-2 (-2.5) cm wide, interrupted spike or panicle with 5-25 mm long, erect, appressed branches. |
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(4) |
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Capitula in a narrow to broadly pyramidate, more than 3 cm wide panicle with ascending to obliquely or horizontally spreading branches. |
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(7) |
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| 4 (3) |
Basal and lower stem leaves bipinnatisect. |
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(5) |
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Basal and lower stem leaves tripinnatisect. |
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(6) |
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| 5 (4) |
Capitula 3.5-4 mm long, c. 2.5 mm across, rusty brown, densely arachnoid hairy outside, 3-6 (-10) together in ± globose glomerules. |
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3 Seriphidium leucotrichum |
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Capitula 2-3 mm long, c. 1.5 mm across, not rusty brown, sparsely hairy to ± glabrous and punctate-glandular outside, remote or 2-3-together in each glomerule. |
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4 Seriphidium vachanicum |
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| 6 (4) |
Capitula glabrous to hardly puberulous. |
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5 Seriphidium chitralense |
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Capitula arachnoid hairy. |
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6 Seriphidium brevifolium |
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| 7 (3) |
Leaf blade up to 16 mm long. |
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(8) |
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Leaf blade more than 20 mm long. |
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(9) |
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| 8 (7) |
Plants up to 30 (-35) cm tall. Panicle with horizontally (almost at rt. angles) spreading branches. Phyllaries (especially outermost) densely to sparsely puberulous. |
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7 Seriphidium sieberi |
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Plants usually more than 40 cm tall. Panicle with obliquely (slightly upwardly directed) spreading branches. Phyllaries glabrous. |
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8 Seriphidium stenocephalum |
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| 9 (7) |
Basal leaves 20-30 mm long. |
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(10) |
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Basal leaves more than 30 mm long. |
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(12) |
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| 10 (9) |
Capitula distinctly remote, 2.5-3 mm long. Phyllaries almost glabrous, shining. |
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9 Seriphidium tecti-mundi |
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Capitula usually approximate or very slightly remote, 3-4.5 mm long. Phyllaries sparsely hairy or arachnoid. |
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(11) |
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| 11 (10) |
Stem and leaves at anthesis densely ± arachnoid whitish hairy. Basal leaves shorter than the median. Capitula (3.5-) 4-4.5 mm long, arachnoid hairy. |
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10 Seriphidium quettense |
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Stem and leaves at anthesis glabrescent to almost glabrous, purpureous-pale. Capitula 3-3.5 mm long, sparsely hairy. |
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11 Seriphidium glanduligerum |
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| 12 (9) |
Capitula very approximate or distinctly remote, 2.5 – 3 mm long. Panicle densely congested and throughout much closely branched with very numerous capitula or laxly branched. |
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(13) |
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Capitula remote or ± congested towards branch tips, 3 – 4 mm long. Panicle with ± spreading to obliquely erect lax branches. |
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12 Seriphidium oliverianum |
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| 13 (12) |
Middle stem leaves withered at anthesis. Panicle densely congested and throughout much closely branched with very approximate and very numerous capitula. |
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13 Seriphidium kurramense |
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Middle stem leaves present at anthesis. Panicle not congested (rather lax) with distinctly remote capitula. |
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9 Seriphidium tecti-mundi |
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List of lower taxa
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