Glossary - general
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Quadrangular – with four angles
Quadrate – almost square in form
Quadrifid – cleft in four to about the middle; of a trichome with four branches
Quaternary veins, quinary veins – tiny veins, branching off from tertiary veins
Quinate – growing together in fives, e.g. leaflets from the same point, as in some Rosaceae
Quinquelobate – with five lobes
Quinquepartite – deeply divided into five parts
Quincuncial aestivation – imbricate aestivation when five organs are present; one sepal/petal has one edge outside the adjacent sepal/petal and the other one inside, two sepals/petals have both edges inside, and two sepals/petals have both edges outside