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10. Hyoscyamus L., Sp. Pl. 179. 1753. Gen. Pl. ed. 5.84.1754; Dunal in A.DC., Prodr. Syst. Nature. 13, 1:546-553.1852; Boiss., Fl. Or. 4:293-297.1879; Schoenbeck-Temesy in Rech. f., Fl. Iran. 100:49.1972; Cooke, Fl. Presd. Bomb. Reprint edit. 2:344.1967; Baytop in Davis, Fl. Turk. 6:453.1978.
YASIN J. NASIR
Annual, biennial or perennial herbs. Leaves variously lobed. Flowers in cincinni, ± irregular, variously coloured. Calyx enlarging and enclosing the fruit. Corolla infundibuliform, 5-lobed; lobes ± unequal, imbricate in bud. Stamens 5, attached about the middle or at the base of the corolla tube; anthers usually exserted, oblong, dehiscing longitudinally. Ovary bilocular. Style filiform, stigma subcapitate. Capsule (pyxidium) erect, enclosed in the calyx, dehiscence by a lid. Seeds many, compressed.
20 species, often hard to separate; Mediterranean to S.W. & C. Asia, Represented in Pakistan by 4 native species.
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| 1 |
Perennial. Calyx lobes 2-3 mm long, ± obtuse cuspidate. Seeds 0.9-1.0 mm long |
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1 Hyoscyamus insanus |
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Annual or biennial. Calyx lobes 4-10 mm long, subulate to aristate |
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(2) |
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| 2 (1) |
Annual. Calyx lobes reflexed in fruit. Corolla 12-16
mm long, slightly exceeding calyx. Capsule 5-6 mm long. Seeds ruminate-rugose |
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2 Hyoscyamus pusillus |
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Biennial, rarely annual. Calyx lobes not reflexed in fruit. Corolla 20-30 mm long, c. twice length of calyx. Seeds pitted or rugose-tuberculate |
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(3) |
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| 3 (2) |
Leaves ovate-oblong. Calyx urceolate (in fruit), less than 1/2 cleft: lobes broad triangular-aristate, 4-6 mm long. Filaments purplish suffused. Seeds ± 1.2 mm long, pitted |
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3 Hyoscyamus niger |
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Leaves lanceolate to oblanceolate. Calyx campanulate (in fruit), c. 1/2 cleft; lobes triangular subulate, 7-10 mm long. Filaments not purplish-suffused. Seeds ± 1.6 mm long, rugose-tuberculate |
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4 Hyoscyamus squarrosus |
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Lower Taxa
Related Synonym(s):
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