HABIT
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AN ERECT, THORNY, STRIGOSE-HISPID HERB; UP TO 60 CM TALL.
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STEMS
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THE STEM IS SQUARE AND
THICKENED AT NODES AND HAIRY. THE BARK IS DARK BROWN.
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LEAVES
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WHORLED, LANCEOLATE, DENTATE, ACUMINATE, BASE CUNEATE, SCABROUS,
SUB-SESSILE.
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FLOWERS
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PINK OR BLUE-PURPLE; SESSILE,
IN AXILLARY WHORLS, SURROUNDED BY YELLOWISH STIFF SPINES.
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FRUITS
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CAPSULE 1 CM. LONG, LINEAR OBLONG, POINTED GLABROUS, AND ABOUT 8
SEEDED.
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