Search results
Results from the WOW.Com Content Network
The other major grouping is the core Dahlia clade (CDC), which includes most of the section Dahlia. The remainder of the species occupy what has been described as the variable root clade (VRC) which includes the small section Pseudodendron but also the monotypic section Epiphytum and a number of species from within section Dahlia.
'Moonfire' (VanDusen Botanical Garden, Stan Shebs)The following is a list of dahlia cultivars which have gained the Royal Horticultural Society's Award of Garden Merit.They are tuberous perennials, originally from South America, with showy daisy-like composite flowerheads in all shades and combinations of white, yellow, orange, pink and red, flowering in late summer and autumn (fall).
Plant species where normal mode of seed set is through a high degree of cross-pollination have characteristic reproductive features and population structure. Existence of self-sterility, [1] self-incompatibility, imperfect flowers, and mechanical obstructions make the plant dependent upon foreign pollen for normal seed set. Each plant receives ...
Some scientists argue that pollination effectiveness (PE), which is measured by studying the germination rates of seeds produced from flowers visited only once by a single animal, is the best way to determine which animals are important pollinators [22] though other scientists have used DNA barcoding to determine the genetic origin of pollen ...
The U.S. Postal Service introduces a "Pollination" stamp series released in June 2007. The U.S. Senate passed a Resolution to protect pollinators and designates June 24–30, 2007 National Pollinator Week. "Nature's Partners", a pollinator curriculum for Grades 3-6 introduced ; First-ever pollinator provision written into the 2008 Farm Bill.
Fasciculated root (tuberous root) occur in clusters at the base of the stem; examples: asparagus, dahlia. Nodulose roots become swollen near the tips; example: turmeric. Brace roots arise from the first few nodes of the stem. These penetrate obliquely down into the soil and give support to the plant; examples: maize, sugarcane.
Adult film star Dahlia Sky was found dead in a vehicle in Los Angeles two weeks ago, and authorities have since ruled her death a suicide. Sky, 31, died June 30 from a self-inflicted gunshot wound ...
A pollinium (pl.: pollinia) is a coherent mass of pollen grains in a plant that are the product of only one anther, but are transferred, during pollination, as a single unit. [1] [2] This is regularly seen in plants such as orchids and many species of milkweeds (Asclepiadoideae). Usage of the term differs: in some orchids two masses of pollen ...