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Species: Aristolochia albida Duch. Date: 2007-03-08 Location: Road East of Casa Banana, Sofala. Habitat: Roadside near margin of sand forest
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Hobro
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Hobro, kultiv.
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Århus Botaniske Have
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Hydnora africana root growing alongside Euphorbia rootA Hydnora africana that has numerous contacts with a Euphorbia (white) root. The Euphorbia roots form pad like structures. The nature of the underground axis (stem or root?) in Hydnora is not easy to determine with certainty, because there are no close relatives of Hydnora, and Hydnora is highly specialized for parasitism. However, there are reasons to favor the concept that the Hydnora axes are roots rather than stems. The growing tips show no evidence of reduced leaves at all, and there are no reduced leaves adjacent to the bases of the flowers. The five or six longitudinal rows of stubby roots on the axis remind one of patterns of lateral root formation on roots, whereas lateral roots that form on stems of plants don't tend to form neat longitudinal rows. And flowering plants other than Hydnora that are root parasites form roots (as in Orobanche), not underground stems, that interconnect with roots of host plants.
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Trilium Gap Trail, Great Smoky Mountains National Park, Sevier County, Tennessee, US
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Radnor Lake State Natural Area, Nashville, Davidson County, Tennessee, US
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Species: Aristolochia albida Duch. Date: 2011-01-13 Location: Mana Pools, near Main Office Habitat: Riverine vegetation
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Hobro
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Hobro, kultiv.
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Århus Botaniske Have
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Hydnora africanaFrom
Botanical Society of America Online Image CollectionThe flower of Hydnora, when it first opens, has white threadlike structures that cross the gap between the "sepals." The openings between these threads are barely large enough for a beetle to enter. More about that later! Although a beetle may enter a flower, it evidently has difficulty in finding its way out of the flower. This keeps it inside a flower long enough so that the beetle can pick up pollen or deposit pollen on its surface onto the stigmas at the bottom of the floral tube.
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Trilium Gap Trail, Great Smoky Mountains National Park, Sevier County, Tennessee, US
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Radnor Lake State Natural Area, Nashville, Davidson County, Tennessee, US
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Species: Aristolochia albida Duch. Date: 2011-01-13 Location: Mana Pools, near Main Office Habitat: Riverine vegetation
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Hobro
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Hobro, kultiv.
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Århus Botaniske Have
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Hydnora africana and host Euphorbia caput-medusaeFrom
The Botanical Society of America Online image CollectionThe only portion of Hydnora that appears above the ground surfaces is the upper portion of the flower. Much of the flower is below the soil surface. The flower is thick and succulent in texture. The portion of the flower above the ground surface is tubular and has three openings, one of which is shown here. There are three thick structures, which botanically should be called perianth segments, and which might be likened to sepals, that tend to stay united at the top of the flower.
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Trilium Gap Trail, Great Smoky Mountains National Park, Sevier County, Tennessee, US
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Radnor Lake State Natural Area, Nashville, Davidson County, Tennessee, US
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Species: Aristolochia albida Duch. Date: 2010-11-00 Location: Near Rhino Safari Camp, Matusadona Habitat:
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Vive Præstegård, Jylland, Danmark
