Sp. Pl. 2: 666. 1753.


Gen. Pl. ed. 5, 298. 1754.

Common names: Tower-mustard towercress
Etymology: Latin turris, tower, alluding to pyramidal shape of plants due to overlap of leaves and fruits
Treatment appears in FNA Volume 7. Treatment on page 458. Mentioned on page 226, 235, 242, 257.

Biennials or, rarely, perennials (short-lived); not scapose; (glaucous distally), glabrous or pubescent (mostly proximally), trichomes simple and/or stalked, forked, or substellate. Stems erect, unbranched basally, often branched distally. Leaves basal and cauline; petiolate or sessile; basal rosulate, petiolate, margins usually dentate, sinuate, repand, or pinnatifid, rarely entire; cauline blade (base auriculate or sagittate [amplexicaul]), margins dentate or entire. Racemes (corymbose), considerably elongated in fruit. Fruiting pedicels erect [divaricate], (appressed to rachis), slender. Flowers: sepals erect, oblong or linear, (margins membranous); petals usually yellowish or creamy white, rarely pink [purplish], usually narrowly spatulate or linear-oblanceolate, rarely linear, claw not differentiated from blade, (apex obtuse); stamens (erect), tetradynamous; filaments not dilated basally; anthers narrowly oblong [linear], (apex obtuse); nectar glands confluent, subtending bases of stamens, lateral glands annular, median glands present. Fruits siliques, dehiscent, sessile, linear, smooth, often subterete-quadrangular, (leathery); valves each with prominent midvein, glabrous; replum rounded; septum complete, (membranous, veinless); ovules 130–200 per ovary; (style distinct, short, stout); stigma capitate, (subentire). Seeds biseriate, flattened, not winged or, rarely, narrowly winged, oblong or subglobose [elliptic, orbicular]; seed coat not mucilaginous when wetted; cotyledons accumbent. x = 6, 8.


North America, Eurasia, n Africa.


Species 2 (1 in the flora).

Turritis laxa (Smith) Hayek is distributed in eastern Europe and the Middle East.

Lower Taxa

... more about "Turritis"
Ihsan A. Al-Shehbaz +
Linnaeus +
Tower-mustard +  and towercress +
North America +, Eurasia +  and n Africa. +
Latin turris, tower, alluding to pyramidal shape of plants due to overlap of leaves and fruits +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
dvoak1967a +
Cruciferae +
Turritis +
Brassicaceae tribe Camelineae +