hypanthium absent

Listing 1 - 4 from 4 for hypanthium absent

Angiosperm Families - Acanthaceae Juss.
... . Cortical bundles absent. Medullary bundles present (rarely), or absent. Internal phloem present, or absent. Secondary thickening developing from a conventional cambial ring. ‘Included’ phloem absent. Xylem with ... and involving the androecium. Flowers 4 merous, or 5 merous; tetracyclic. Free hypanthium absent. Hypogynous disk present. Perianth with distinct calyx and corolla; (6–)8, or ...
delta-intkey.com

Angiosperm Families - Aceraceae Juss.
... tissue in a cylinder, without separate bundles; centrifugal. Cortical bundles absent. Medullary bundles absent. Internal phloem absent. Secondary thickening developing from a conventional cambial ring. The ... nor gynophore. Free hypanthium absent. Hypogynous disk present, or absent (rarely); of separate members, or annular (annular or lobed, or reduced to teeth, rarely absent). Perianth with ...
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Evolution of the Cactaceae
... ample water for sedimentation. Thus the fossil record for cacti is poor, or in fact absent. In 1944, a presumed fossil cactus ^Eopuntia douglasii^ was described from Eocene deposits in Utah ... Aizoaceae (including the mesembs) was the sister family to the cacti (due to the floral hypanthium) was proved fallacious in independent tests of phylogeny for the order (Caryophyllales). We are ~continuing ...
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Glossary
... required for growth. Hydrosere- An ecological sere (plant community) originating in an aquatic habitat. Hypanthium- A floral tube formed by the fusion of the basal portions of the sepals, ... lying on the surface of, and essentially unmixed with, the mineral soil. Earthworms are absent. Muck- Highly decomposed organic material formed under conditions of waterlogging, with few recognizable remains ...
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