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FNA | Family List | FNA Vol. 7 | Brassicaceae

36. Transberingia Al-Shehbaz & O’Kane, Novon. 13: 396. 2003.

[Latin trans-, across, and Bering Sea, alluding to distribution] [Latin trans-, across, and Bering Sea, alluding to distribution]

Ihsan A. Al-Shehbaz

Beringia R. A. Price, Al-Shehbaz & O’Kane, Novon 11: 333. 2001, not Perestenko 1975

Perennials; not scapose; glabrous or pubescent, trichomes simple, forked, stalked, or dendritic. Stems erect or ascending, unbranched or branched basally and distally. Leaves basal and cauline; petiolate or sessile; basal rosulate, petiolate, blade margins often entire, sometimes dentate, rarely sinuate; cauline blade (base not auriculate, sagittate), margins usually entire, rarely dentate. Racemes (corymbose, several-flowered), elongated in fruit. Fruiting pedicels ascending to subdivaricate, slender (terete). Flowers: sepals erect, oblong, (pubescent); petals white, oblanceolate, (longer than sepals), claw obscurely differentiated from blade, (apex obtuse); stamens slightly tetradynamous; filaments not dilated basally; anthers oblong, (apiculate); nectar glands confluent, subtending bases of stamens. Fruits siliques, dehiscent, sessile or subsessile, linear, smooth, terete; valves each with prominent midvein and marginal veins, secondary veins anastomosing and distinct or obscure, glabrous; replum rounded; septum complete; ovules 70-150 per ovary; (style obsolete or distinct); stigma capitate. Seeds biseriate, plump, not winged, narrowly oblong; seed coat (minutely reticulate), not mucilaginous when wetted; cotyledons incumbent. x = 8.

Species 1: n, w North America, e Asia (Russian Far East).

For discussion of the generic limits of Transberingia, see the original description and also under 60. Halimolobos.

Lower Taxa


 

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