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Helianthus anomalus is of particular interest due to its genetics. It was produced via hybridization of two other sunflower species, H. annuus and H. petiolaris, multiple times between approximately 60,000 and 200,000 years ago. [1] From these two parent plants, three hybrids were formed, each with distinct characteristics and habitat preferences.
Helianthus × cinereus is a species of sunflower native to the United States, in Missouri, Kentucky, Indiana, and Ohio. [2] H. cinereus was proposed as a new species by Torrey and Gray in 1842. It is a natural hybrid with similar features to artificial hybrids between Helianthus mollis and Helianthus occidentalis. [2] [3]
Hybrid species are often more vigorous and genetically differed than their ancestors. There are primarily two different forms of hybridization: natural hybridization in an uncontrolled environment, whereas artificial hybridization (or breeding ) occurs primarily for the agricultural purposes.
Helianthus spp. are a nectar producing flowering plant that attract pollinators and parasitoids which reduce the pest populations in nearby crop vegetation. Sunflowers attract different beneficial pollinators (e.g., honey bees) and other known insect prey to feed on and control the population of parasitic pests that could be harmful to the ...
By doing so, new genetic recombinations are obtained ultimately leading to the production of new hybrid species. These hybrid species generally have a higher fitness and carry properties or characteristics that farmers look for, such as resistance to pathogens. [26] Hybrid, Helianthus annuus dwarf2 does not contain the hormone gibberellin and ...
Close-up of a Schlumbergera flower, showing part of the gynoecium (specifically the stigma and part of the style) and the stamens that surround it. Plant reproductive morphology is the study of the physical form and structure (the morphology) of those parts of plants directly or indirectly concerned with sexual reproduction.
Helianthus × brevifolius is a hybrid perennial species of sunflower in the family Asteraceae. It is native to N. Central & NE. U.S.A., [ 2 ] including Ohio . [ 3 ]
Helianthus mollis grows on prairies, roadsides, dry open woods, rocky glades, fields, and thickets. [3] It is a perennial herbaceous plant up to 1.5 m (4.9 ft) tall, spreading by means of underground rhizomes. The leaves are mostly along the stem rather than crowded near the base, each egg-shaped with teeth along the edges.