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FOC | Family List | FOC Vol. 24 | Liliaceae

1. Tofieldia Hudson, Fl. Angl., ed. 2. 157 [175]. 1778.

岩菖蒲属 yan chang pu shu

Chen Xinqi (陈心启 Chen Sing-chi); Minoru N. Tamura

Tofieldia divergens

Credit: Harvard University Herbaria

Herbs perennial, with a short, ascending rhizome. Leaves basal or nearly so, 2-ranked, basally equitant, sword-shaped, laterally flattened. Scape erect, slender, apically with a many-flowered raceme or rarely a spike. Flowers bisexual, arising from axils of bracts, small, often subtended by 1 cupular or rarely 3 nearly free bracteoles. Perianth segments 6, free or basally connate, persistent. Stamens 6, often free, sometimes connate at base or inserted at base of perianth segments; anthers ovate, basifixed or subdorsifixed, introrse to latrorse. Ovary superior, usually ovoid, 3-lobed apically, stipitate or sessile; ovules numerous; septal nectaries often present. Styles 3, rather short, with introrse stigmas. Fruit a septicidal capsule, 3-loculed, sometimes folliclelike due to very deep clefts. Seeds small, usually linear to oblong.

About 20 species: mainly in subarctic, temperate, and subtropical regions of the N hemisphere; three species (two endemic) in China.

Although Tamura (in Kubitzki, Fam. Gen. Vasc. Pl. 3: 389. 1998) placed Tofieldia in the Nartheciaceae, Wu Zhengyi (editor’s note) believes it should be treated in the segregate family Tofieldiaceae, as was done by Takhtajan (Diversity Classific. Fl. Pl. 478. 1997).

1 Style nearly as long as anthers; capsule globose, 2--2.5(--3) mm in diam., apically scarcely or slightly 3-lobed, with persistent, conspicuously thickened stigmas; pedicel 0.5--0.8 mm at anthesis   1 Tofieldia coccinea
+ Style obviously longer than anthers; capsule ellipsoid or obovoid, apically 3-lobed to 3-parted, with persistent stigmas not thickened; pedicel (1--)1.5--12 mm at anthesis.   (2)
2 (1) Seeds without a white, longitudinal band; pedicel (1--)1.5--3(--7) mm; capsule horizontal to nodding   2 Tofieldia divergens
+ Seeds with a white, longitudinal band on 1 side; pedicel (3--)5--12 mm; capsule suberect   3 Tofieldia thibetica

Lower Taxa


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