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FOC | Family List | FOC Vol. 17 | Lamiaceae

66. Hyssopus Linnaeus, Sp. Pl. 2: 569. 1753.

神香草属 shen xiang cao shu

Plants perennial herbs or subshrubs. Leaves mostly linear to oblong, margin entire, involute, or flat. Verticillasters 2- to many flowered, mostly secund, axillary, often in long terminal spikes, lower ones lax, upper crowded; floral leaves similar to stem leaves, reduced; bracts and bracteoles minute. Pedicel distinct. Calyx tubular to subcampanulate, brightly colored, conspicuously 15-veined, hairy, glandular, teeth 5, equal, sinuses with a thickening at junction of 2 side veins. Corolla blue, purple, or occasionally white, hairy outside, glandular, glabrous inside, tube nearly included or conspicuously exserted, limb 2-lipped; upper lip emarginate or 2-lobed, sometimes subentire; lower lip spreading, 3-lobed; middle lobe longer than lateral lobes, truncate to emarginate. Stamens 4, mostly exserted, anterior 2 longer; filaments glabrous; anthers ovoid, cells 2, divaricate. Style apex equally 2-cleft. Nutlets oblong to oblong-ovoid, hairy, glandular, or glabrous.

About 15 species: Africa, Asia, Europe; two native and one cultivated in China.

1 Leaves, bracts, and calyx teeth cuspidate at apex   2 Hyssopus cuspidatus
+ Leaves, bracts, and calyx teeth not cuspidate.   (2)
2 (1) Corolla ca. 1 cm, tube nearly included; calyx ca. 7.5 mm; nutlets glabrous; leaves 1-4 cm × 2-7 mm   1 Hyssopus officinalis
+ Corolla ca. 1.3 cm, tube conspicuously exserted; calyx ca. 6 mm; nutlets puberulent at apex; leaves 1-2 cm × 1-2 mm   3 Hyssopus latilabiatus

Lower Taxa


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