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In some cacti, two types of sharp structures are found, spines and glochids.

013.pdf Family [family] Genus [genus] Below genus (specific epithet etc.) [species-etc] Common name [common]

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The halves of an indented key’s couplets are separated from each other, sometimes by several lines, while the halves of a bracketed key’s couplets are sequential in the key.

Orchid growth types are monopodial, which is considered determinate, or sympodial, an indeterminate growth type.

A key is called polytomous when there can be multiple answers for each question, but dichotomous when there are only two answers per question.

180.pdf Family [family] Genus [genus] Below genus (specific epithet etc.) [species-etc] Common name [common]

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