WorldFloraDB - Syagrus

Characteristics

Solitary or clustering (not in Australia) palms. Trunk acaulescent (not in Australia) or erect, with annular leaf scars. Leaves paripinnate, plumose, spirally arranged or ranked, marcescent or caducous (not in Australia); crownshaft absent. Pinnae reduplicate, few (not in Australia) to numerous, regularly (not in Australia) or irregularly arranged in 1–several planes, linearacuminate; ramenta present. Inflorescence interfoliar, paniculate, branched to 1 order; petiole short or long (not in Australia); bracts 2; prophyll tubular; peduncular bract tubular, longer than prophyll, inserted just above prophyll, woody, apically beaked, longitudinally grooved, persistent; rachis shorter than peduncle; rachillae few to numerous, short (not in Australia) or elongate, slender. Flowers spirally arranged on rachillae, with triads in proximal portion, paired or solitary staminate flowers in distal portion. Staminate flowers asymmetric; stamens 6; anthers dorsifixed or medifixed; pistillode small or absent. Pistillate flowers smaller or larger (not in Australia) than staminate ones. Fruit globose (not in Australia), ovoid or ellipsoid; mesocarp fleshy or dry, fibrous (not in Australia); endocarp thick, with 3 basal pores. Seed shaped similar to endocarp; endosperm homogeneous (not in Australia) or ruminate, occasionally with an internal cavity; embryo basal to sub-basal. Eophyll simple.

More

Stems solitary, erect, robust, unarmed, bearing conspicuous nodal rings. Leaves: petiole unarmed; sheath not forming crownshaft; blade pinnate, unarmed; plication reduplicate; segments regularly arranged in multiple planes, apices acute to 2-cleft. Inflorescences axillary within crown of leaves, paniculate, 1 order of branching, ascending, becoming pendulous in fruit; prophyll short; peduncular bract woody, beaked, splitting abaxially, becoming boat-shaped. Flowers unisexual, sessile, borne in triads of 1 pistillate flower flanked by 2 staminate, staminate flowers borne singly along distal portions of rachillae. Staminate flowers: sepals 3, connate; petals 3, free, valvate, leathery; stamens 6, free; anthers linear; pistillode with 3 minute lobes. Pistillate flowers borne basally on rachillae, massive; sepals 3, imbricate, free; petals 3, imbricate, free; staminode a low annular ring at base of pistil; pistil 1, large; ovules 1; style indistinct; stigmas 3. Fruits drupes, ovoid, less than 4 cm diam.; exocarp orange, thin, smooth; mesocarp fleshy, oily; endocarp thick, bony, irregularly folded into seed, with 3 basal germination pores. Seeds irregular with hollow cavity; endosperm homogeneous; embryo basal; eophyll undivided, lanceolate.

Life form	perennial
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Foliage retention	deciduous
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Environment

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Hardiness (USDA)

Usage

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Cultivation

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