Erect, dwarf shrub, 0.2-0.3(-0.6) m high. Leaves 4-nate, 20-25 mm long, elongate-linear, acute, adaxially puberulous, abaxially glabrous or minutely scabridulous, edged with minute sessile glands. Flowers (1-3)4-nate at ends of short to medium brachyblasts, sparsely scattered over plant. Calyx 4-partite, green; sepals linear, upper 2/3 foliaceous. Corolla 4-lobed, tubular-urceolate with subquadrate swollen base, minutely puberulous, lime-green turning yellowish; lobes erect, very broadly rounded, minutely ciliate. Stamens 8, included; filaments filiform, glabrous; anthers oblong, acute, smooth, aristate; appendages 1.3 mm long, partially decurrent along filament; pore 1.6 mm long. Ovary narrowly ellipsoid subquadrate, glabrous, 4-celled, dark green; style ± exserted, narrow with slightly swollen base, stigma capitulate. Flowering time Aug.-Nov.
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Erect, gnarled, woody shrublet to 60 cm. Flowers large, tubular, lime-green, finely hairy.