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| habit - glaucous, prickly annual or biennial | |
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| bud with horned sepals | Can you see the many stamens? |
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although there are no prickles on the upper leaf surfaces, prickles can be seen on the underside veins of the leaves |
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| leaves are auricled-clasping | |
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| Texas species contain a pale yellow to reddish-orange latex becoming brownish-black upon drying |
