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FNA | Family List | FNA Vol. 7 | Brassicaceae

60. Halimolobos Tausch, Flora. 19: 410. 1836.

[Greek halimos, of salt, and lobos, rounded protuberance, alluding to superficial resemblance of fruit indumentum to salt]

Ihsan A. Al-Shehbaz, C. Donovan Bailey

Poliophyton O. E. Schulz

Annuals, biennials, or perennials; (base often woody); not scapose; pubescent throughout, trichomes sessile, subsessile, or short-stalked, dendritic and subdendritic, 3-6-rayed. Stems erect or ascending, unbranched or branched distally. Leaves cauline and sometimes basal; petiolate or sessile; basal (often withered by anthesis or fruiting), not rosulate, petiolate, blade margins coarsely dentate or pinnatifid [sinuate]; cauline petiolate or sessile, blade margins dentate or sinuate-dentate. Racemes (corymbose), slightly to considerably elongated in fruit. Fruiting pedicels divaricate or descending, slender, (densely pubescent). Flowers: sepals slightly or widely spreading, oblong; petals white, oblanceolate or spatulate, (± equal to sepals), claw obscurely differentiated from blade, (apex obtuse); stamens slightly tetradynamous, (slightly spreading, equal to or longer than petals); filaments not dilated basally; anthers oblong [ovate], (apex obtuse); nectar glands confluent, subtending bases of stamens. Fruits siliques or silicles, sessile, not or obscurely torulose, linear or ovoid to oblong, terete or angustiseptate; valves each obscurely veined, densely pubescent, (trichomes appressed, [sub]sessile, subdendritic, mixed with coarser, short-stalked, larger ones); replum rounded; septum complete; ovules 16-110 per ovary; style distinct; stigma capitate. Seeds uniseriate in siliques, biseriate in silicles, plump, not winged, oblong; seed coat (minutely reticulate), mucilaginous when wetted; cotyledons incumbent. x = 8.

Species 6 (3 in the flora): sw United States, n Mexico.

SELECTED REFERENCE Rollins, R. C. 1943. Generic revisions in the Cruciferae: Halimolobos. Contr. Dudley Herb. 3: 241-265.

1 Annuals or biennials (bases not woody); fruits oblong to ovoid, 3-4(-5) mm wide, slightly angustiseptate; ovules (60-)70-110 per ovary; seeds biseriate.   3 Halimolobos pubens
+ Perennials (bases often woody); fruits linear, 0.5-0.9 mm wide, terete; ovules 16-38 per ovary; seeds uniseriate   (2)
2 (1) Fruits 0.6-1.4(-1.7) cm; ovules 16-24 per ovary; sepals 1.2-2 mm; petals 1.8-2.5 mm; se Arizona, New Mexico, sw Texas.   1 Halimolobos diffusa
+ Fruits (1-)1.5-2.6 cm; ovules 28-38 per ovary; sepals 2-4 mm; petals (3.5-)4.5-6 mm; e California, w Nevada.   2 Halimolobos jaegeri

Lower Taxa


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