Hypogeal lilies evolved in harsher habitats where it would be advantageous to store food in a bulb, and later send up leaves in the spring.
12.
Plants that show hypogeal germination need relatively little in the way of external nutrients to grow, therefore they are more frequent on nutrient-poor soils.
13.
In water purification works, the "'hypogeal "'( or Schmutzdecke ) layer is a biological film just below the surface of slow sand filters.
14.
The mountain brushtail possum is known to feed at ground level and they are able to utilise hypogeal and epigeal fungi as well as ground-level plants food resources.
15.
Slow sand filters work through the formation of a gelatinous layer ( or biofilm ) called the hypogeal layer or " Schmutzdecke " in the top few millimetres of the fine sand layer.
16.
In botany, a seed is described as showing "'hypogeal germination "'when the cotyledons of the photosynthetic above the ground, is "'epigeal germination " '.
17.
The different rates of maturity between the stamens and the pistil insures hypogeal, the cotyledons remaining underground after germination and seedling emergence, the seedlings need a few years of growth before they are large enough to flower.
18.
The design included a circular iron plate that could be moved to cover the entire hypogeal night club at closing time so that from a bird's-eye view, the club resembled a helicopter landing pad.
19.
Groups which contain both hypogeal and epigeal species include, for example, the Araucariaceae family of Southern Hemisphere conifers, the Fabaceae ( pea family ), and the genus " Lilium " ( see Lily seed germination types ).
20.
The second method, sometimes called wet harrowing, involves lowering the water level to just above the hypogeal layer, stirring the sand; thus precipitating any solids held in that layer and allowing the remaining water to wash through the sand.
