(Last Modified On 1/22/2013)
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(Last Modified On 1/22/2013)
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Genus
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PHENAX Wedd.
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PlaceOfPublication
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Ann. Sci. Nat. IV. 1:191. 1854.
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Description
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Unarmed shrubs or suffrutescent herbs; leaves alternate, petiolate, toothed, rarely entire, the cystoliths mainly punctiform; plants monoecious or dioecious, the flowers in dense, sessile, axillary clusters; staminate flowers usually 4-lobed; pistillate flowers without a perianth, the small achene sessile and subtended by a brown, scarious bractlet, the stigma elongate-filiform, persistent.
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Habit
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shrub herb
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Key
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a. Plants dioecious; leaves narrowly lanceolate, minutely serrulate, attenuate-acuminate ........................................................ 1. P. ANGUSTIFOLIUS aa. Plants monoecious; leaves ovate or ovate-lanceolate, coarsely crenate- serrate or crenulate-serrate. b. Leaves ovate-lanceolate, narrowed at base, flat, glabrous except occa- sionally for a few hairs on the nerves beneath; stem glabrous ............. 2. P. MEXICANUS bb. Leaves ovate, rounded or cordulate at base, more or less rugose, densely pubescent beneath; stem hirsute ............................................... 3. P. PUGOSUS
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