STEM : Herbaceous but woody below, erect, branched, cylindrical, solid, angular, hairy,
longitudinally striated, nodes and internodes are prominent, green but violet or pink at nodes.
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LEAVES : Ramal and cauline, simple, exstipulate, opposite decussate, petiolate, ovate or
obovate, entire, acute or acuminate, hairy all over, unicostate reticulate.
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FLOWERS : Bracteate, bracteolate, bracteoles two, shorter than perianth, dry, membranous
persistent, sessile, complete, hermaphrodite, actinomorphic, pentamerous, hypogynous,
small, spinescent, green. Bracts ovate, persistent, awned.
Perianth made up of 5 tepals, polyphyllous, imbricate or quincuncial, green, ovate to oblong,
persistent.
Androecium made up of 10 stamens, out of which 5 are fertile and 5 are scale-like,
fimbriated, sterile staminodes, both alternating with each other, fertile stamens are
antiphyllous,monadelphous, filaments slightly fused at the base, dithecous, dorsifixed or
versatile, introrse.
Gynoecium is bicarpellary, syncarpous, superior, unilocular, ovule one, basal placentation,
style single and filiform, stigma capitate.
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