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Lasthenia
''Lasthenia'', commonly known as goldfields, is a genus of flowering plants in the family Asteraceae. The genus is named after Lasthenia of Mantinea, a cross-dressing female pupil of the ancient Greek philosopher Plato. Description The goldfield genus comprises annual (rarely perennial) herbs that are either glabrous or hairy. Stems are typically branched and erect, attaining a height of less than . Their opposite leaves, up to in length, have entire margins and pinnate venation. Inflorescences are characterized by solitary heads (sometimes in cymes), with phyllaries free or partly fused. The receptacle may present as naked and narrowly conic to hemispherical. The normally yellow ray florets may number 4 to 16, and the ligules are typically yellow as well. The numerous disk florets typically have yellow, 5-lobed corollae. Anther tips manifest as acuminate to triangular. Style tips may be triangular or round and are typically hair-tufted. Fruits are less than across, cylindri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lasthenia Glabrata
''Lasthenia glabrata'' is a North American species of flowering plant in the family Asteraceae known by the common names yellowray goldfields and yellow-rayed lasthenia. It is endemic to California, where it is a resident of vernal pools and other moist areas in a number of habitat types. It is widespread across much of the state, from San Diego County to Tehama County. Description ''Lasthenia glabrata'' is an annual herb growing up to tall. The thin stem has a few pairs of oppositely-arranged, smooth-edged linear leaves each up to long. full-page color illustration, |
Contra Costa Goldfields
''Lasthenia conjugens'', commonly known as Contra Costa goldfields, is an endangered species of wildflower endemic to a limited range within the San Francisco Bay Area of the state of California, USA. Specifically this rare species occurs in Napa, Santa Barbara, Solano, Contra Costa, Santa Clara, Monterey and Alameda Counties. This annual herb typically flowers from March through June, and its colonies grow in vernal pool habitats at elevations not exceeding 100 meters above sea level. ''The Jepson Manual'' notes that the present distribution is limited to the deltaic Sacramento Valley, principally Napa and Solano Counties, but the historic range of ''L. conjugens'' is known to be significantly wider. In any case, historically the range has included parts of the North Coast, Sacramento Valley, and San Francisco Bay Area as well as the South Coast. Alternatively and less frequently this taxon has been referred to as ''Baeria fremontii var. conjugens''. Even though this plant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lasthenia Californica
''Lasthenia californica'' is a species of flowering plant in the family Asteraceae known by the common name California goldfields. It is native to western North America. Description ''L. californica'' is an annual herb approaching a maximum height near , but generally staying much smaller. The plant is quite variable in appearance across subspecies and climates. The leaves are hairy, somewhat linear in shape, and about long. Individuals growing along the coast may have fleshy leaves. Between March and May, the hairy stems are topped by inflorescences of flower heads, across, with hairy phyllaries. The head contains many yellow disc florets with a fringe of about 10 small ray florets. Large populations of this species bloom at once in the spring to produce the carpets of yellow on hillsides and in meadows that give the plant its common name. The seed sometimes has brownish scales at the tip. '' Crocidium multicaule'' is similar in appearance, but most of its leaves are in a ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lasthenia Of Mantinea
Lastheneia (or Lasthenia) of Mantinea () was a member of the Platonic Academy in the 4th century BCE. She is one of the two known female members of the Academy, the other being Axiothea of Phlius. She was born in Mantinea, in the Peloponnese. After the death of Plato she continued her studies with Speusippus Speusippus (; ; c. 408 – 339/8 BC) was an ancient Greece, ancient Greek philosopher. Speusippus was Plato's nephew by his sister Potone. After Plato's death, c. 348 BC, Speusippus inherited the Platonic Academy, Academy, near age 60, and remai ..., Plato's nephew. She is also said to have had a relationship with Speusippus.Athenaeus, vii. 279, xii. 546. Notes References * 4th-century BC Greek philosophers Ancient Athenian women Ancient Greek women philosophers Students of Plato Ancient Mantineans Year of birth unknown Year of death unknown 4th-century BC Greek women {{AncientGreece-philosopher-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sciaridae
The Sciaridae are a family of fly, flies, commonly known as dark-winged fungus gnats. Commonly found in moist environments, they are known to be a pest of mushroom farms and are commonly found in household plant pots. This is one of the least studied of the large Diptera families, probably due to the small size of these insects and the similarity among species. Currently, around 1700 species are described, but an estimated 20,000 species are awaiting discovery, mainly in the tropics. More than 600 species are known from Europe. Description Adult Sciaridae are small, dark flies 1–11 mm long and usually <5 mm long. They have a characteristic wing venation: there is no cross vein except for a short rs at the wing base, the anterior veins are a short R1 and a long R5, vein M has a simple fork with a long stem, and CuA1 has a fork with a short stem. Larval Sciaridae are slender and lack legs. They are white except for a black head, and their skin is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ephemeral Pool
Vernal pools, also called vernal ponds or ephemeral pools, are seasonal pools of water that provide habitat for distinctive plants and animals. They are considered to be a distinctive type of wetland usually devoid of fish, and thus allow the safe development of natal amphibian and insect species unable to withstand competition or predation by fish. Certain tropical fish lineages (such as killifishes) have however adapted to this habitat specifically. Vernal pools are a type of wetland. They can be surrounded by many communities/species including deciduous forest, grassland, lodgepole pine forest, blue oak woodland, sagebrush steppe, succulent coastal scrub and prairie. These pools are characteristic of Mediterranean climates, but occur in many other ecosystems. Generation and annual development During most years, a vernal pool basin will experience inundation from rain/precipitation, followed by desiccation from evapotranspiration. These conditions are commonly associated with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
