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Manual of the Trees of North America (Exclusive of Mexico) 2nd ed.
img img Manual of the Trees of North America (Exclusive of Mexico) 2nd ed. img Chapter 105 RUBIACE .
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Chapter 105 RUBIACE .

Trees or shrubs, with watery juice, and opposite simple entire leaves turning black in drying, with stipules. Flowers regular, perfect; calyx-tube adnate to the ovary, its limb 4 or 5-lobed or toothed; corolla 4 or 5-lobed; stamens inserted on the tube of the corolla, as many as and alternate with its lobes; filaments free, or united at base; anthe

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