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Pakistan | Family List | Solanaceae

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.


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.

1 Perennial. Calyx lobes 2-3 mm long, ± obtuse cuspidate. Seeds 0.9-1.0 mm long   1 Hyoscyamus insanus
+ Annual or biennial. Calyx lobes 4-10 mm long, subulate to aristate   (2)
2 (1) Annual. Calyx lobes reflexed in fruit. Corolla 12-16 mm long, slightly exceeding calyx. Capsule 5-6 mm long. Seeds ruminate-rugose   2 Hyoscyamus pusillus
+ Biennial, rarely annual. Calyx lobes not reflexed in fruit. Corolla 20-30 mm long, c. twice length of calyx. Seeds pitted or rugose-tuberculate   (3)
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   3 Hyoscyamus niger
+ 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   4 Hyoscyamus squarrosus

Lower Taxa

Related Synonym(s):


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