Annuals c. 50 mm tall, delicate, tufted. Leaves c. 4 per plant, setaceous, 10-15 mm long, erect, broadened below, sheathing peduncles. Capitula solitary, pseudolateral, rarely a second one produced above, 1-4-flowered; bracts tepaloid, lowest forming continuation of stem but not overtopping flowers. Tepals ovate-concave, 2.5 mm long with dark brown margins, outer shorter, pointed. Stamens 3, about half as long as tepals; anthers somewhat shorter than filaments. Ovary ovoid; style short; stigmas fairly long, spreading. Capsule oblong, obtuse, apiculate, golden brown; seeds ovoid, obtuse, 0.3 mm long, golden brown, reticulate.
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Similar to J. rupestris but capitula usually solitary, stamens 3 and style short.