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Morphology of Cacti - Subfamily Cactoideae, Tribe – Rhipsalideae A. P. de Candolle 1828

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Habit

Epiphytes or lithophytes, usually pendulous, sometimes creeping or shrublike, never climbing (Anderson 2001).

Stems

Segmented, round, angled, or flattened in cross section

Leaves

 

Areoles

Sunken

Flower

Borne laterally, diurnal but remaining open at night, small, regular to tubular to bilaterally symmetrical; pericarpels naked and rarely with areoles

Fruits

Fleshy, berrylike, indehiscent

Seeds

Small to medium, lacking definitive surface architecture, hilum and micropyle fused, mucilage sheath present

Glochids

Absent

Spines

 

Roots

Fibrous or tuberous roots

Metabolism

CAM - Crassulacean acid metabolism (Anderson 2001).

Neoteny or paedomorphosis

Absent

Distribution

Mainly in eastern South America but with some species extending into Central and North America. One species, Rhipsalis baccifera, is found also in the Old World

  

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