HABIT
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PERENNIAL HERBS OR UNDERSHRUBS.
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STEMS
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ANGULAR, RIBBED, THICKENED
ABOVE THE NODE, MORE OR LESS DENSELY HAIRY.
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LEAVES
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OPPOSITE; THE BLADES ENTIRE.
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FLOWERS
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CLUSTERED ON A RACHIS OF A
LONG RACEME ON SHORT JOINTED STALKS. PERFECT FLOWERS IN EACH CLUSTER OF 1- 3;
STERILE FLOWERS REDUCED TO FASCICLED HOOKS.
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FRUITS
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UTRICLE, ELLIPSOID, THIN
WALLED, INDEHISCENT, 1- SEEDED.
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