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It is an annual plant with much-branched stems with slender, pubescent, and glandular-hairy branches. Leaf-blades are linear, entire, thinly stellate-pubescent on both surfaces, often glandular-hairy. Flowers are axillary, solitary, with campanulate calyx and purplish-red petals. The fruit is an oblong-ovoid, truncate, sparsely stellate-hairy capsule.