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Verbena Linn., Sp. Pl. 18. 1753. Gen. Pl. ed. 5:12. 1754; Clarke in Hook. f., Fl. Brit. Ind. 4:565. 1885.
Herbs with opposite, decussate, rarely whorled leaves. Inflorescence spicate, rarely pseudumbellate or fascicled, terminal, rarely axillary. Flowers bisexual, small or moderate in size, bracteate. Calyx tubular, 5-ribbed, unequally shortly 5-toothed, not enlarging in fruit. Corolla salver-shaped, 5-lobed, somewhat bilabiate and lobes subequal, oblong to obovate. Stamens usually 4, didynamous, not exserted; anthers ovate, connective with or without a glandular appendage. Carpels 2, syncarpous; ovary entire to 4-lobed, 4-loculed with 1 ovule in each locule; style reaching the level of stamens. Fruit schizocarpic, enclose ed within the calyx, separating into four, 1-seeded nutlets; seeds oblong, angular.
About 250 species, chiefly American; represented here by 4 species.
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| 1 |
Spikes lax and elongated, especially in fruit |
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(2) |
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Spikes densely flowered, paniculately orymbose |
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(3) |
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| 2 (1) |
Leaves deeply serrate, lyrate pinnatifid or subentire. Corolla-tube c. 6 mm long |
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Verbena officinalis |
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Leaves bipinnatisect with narrowly linear segments.
Corolla-tube. c. 10 mm long |
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Verbena tenuisecta |
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| 3 (1) |
Leaves oblong-lanceolate with amplexicaul bases,
sharply serrate. Flowers c. 5 mm across. Calyx-tube
3-4 mm long |
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Verbena bonariensis |
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Leaves oblong-ovate or ovate-triangular, without
amplexicaul bases, pinnatifidly incised or coarsely
serrate. Flowers c. 8 mm across. Calyx-tube c. 10 mm
long |
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Verbena incisa |
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Lower Taxa
Related Synonym(s):
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