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Wolffia Borealis
''Wolffia borealis'' is a species of flowering plant known by the common name northern watermeal. It is native to North America including sections of Canada and the United States. It grows in mats on the surface of calm water bodies, such as ponds. It is a very tiny plant with no leaves, stems, or roots. The green part is up to 1.2 millimeters long with one rounded end and one pointed end. On the flattened top of the plant is a single stamen and pistil Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' .... Like other ''Wolffia'', it is edible and makes a nutritious food. References External linksJepson Manual Treatment [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Engelmann
George Engelmann, also known as Georg Engelmann, (2 February 1809 – 4 February 1884) was a German-American botanist. He was instrumental in describing the flora of the west of North America, then very poorly known to Europeans; he was particularly active in the Rocky Mountains and northern Mexico, one of his constant companions being another German-American, the botanical illustrator Paulus Roetter. Biography Origins George Engelmann was born in Frankfurt am Main, Germany, the oldest of thirteen children, nine of whom reached maturity. His father, Julius Bernhardt Engelmann, was a member of a family from which for several successive generations were chosen ministers for the Reformed Church at Bacharach-on-the-Rhine. Julius was a graduate of the University of Halle, and was also educated for the ministry, but he devoted his life to education. He established a school for young women in Frankfurt, which was rare at the time. George Engelmann's mother, Julie Antoinette, was the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christoph Friedrich Hegelmaier
Christoph Friedrich Hegelmaier (4 September 1833 – 26 May 1906) was a German physician and botanist who was a native of Sulzbach, Württemberg. In 1857 he earned his doctorate from the University of Tübingen, and later was a military doctor in Ulm. In 1864 he received his habilitation at Tübingen, where in 1866 he became an associate professor of botany. He was an authority on the plant family Lemnaceae, and in 1868 published the treatise ''Die Lemnaceen: Eine monographische Untersuchung''. Other important works by Hegelmaier include a monograph of the genus ''Callitriche'', called ''Monographie der Gattung Callitriche'' (1864), and a highly regarded study involving plant embryology, titled ''Vergleichenden Untersuchungen über Entwicklung dikotyledoner Keime'' ("Comparative studies on development of dicotyledonous seeds", 1878). [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elias Landolt
Elias Landolt (1926–2013) was a Swiss geobotanist, known for his publications on Switzerland's native flora and Lemnoideae (popularly called duckweeds or water lenses). Life and career Landolt grew up in the Zurich district Enge. He was the eldest son of the lawyer, politician and later Zurich's mayor Emil Landolt and the great-grandson of his namesake Elias Landolt, a forest scientist. At ETH Zurich (ETHZ), Elias Landolt (the younger) studied natural science from 1945 to 1949 and received his doctorate there in 1953 under the professors Ernst Gäumann and Walo Koch with a dissertation on ''Ranunculus montanus'' (mountain buttercup). From 1953 to 1955, he was a postdoc in California, first at the Carnegie Institution for Science, Department of Plant Biology, Stanford, and then at Caltech in Pasadena. Returning to Zurich in 1955, Landolt joined the academic staff of ETHZ, where he worked until his retirement. In 1957 he completed his habilitation thesis ''Physiologische un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto Wildi
Otto is a masculine German given name and a surname. It originates as an Old High German short form (variants ''Audo'', ''Odo'', ''Udo'') of Germanic names beginning in ''aud-'', an element meaning "wealth, prosperity". The name is recorded from the 7th century ( Odo, son of Uro, courtier of Sigebert III). It was the name of three 10th-century German kings, the first of whom was Otto I the Great, the first Holy Roman Emperor, founder of the Ottonian dynasty. The Gothic form of the prefix was ''auda-'' (as in e.g. '' Audaþius''), the Anglo-Saxon form was ''ead-'' (as in e.g. ''Eadmund''), and the Old Norse form was '' auð-''. The given name Otis arose from an English surname, which was in turn derived from ''Ode'', a variant form of ''Odo, Otto''. Due to Otto von Bismarck, the given name ''Otto'' was strongly associated with the German Empire in the later 19th century. It was comparatively frequently given in the United States (presumably in German American families) during t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamen
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''sporangium, microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in ''Canna (plant), Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gynoecium
Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' and is typically surrounded by the pollen-producing reproductive organs, the stamens, collectively called the androecium. The gynoecium is often referred to as the "female" portion of the flower, although rather than directly producing female gametes (i.e. egg cells), the gynoecium produces megaspores, each of which develops into a female gametophyte which then produces egg cells. The term gynoecium is also used by botanists to refer to a cluster of archegonia and any associated modified leaves or stems present on a gametophyte shoot in mosses, liverworts, and hornworts. The corresponding terms for the male parts of those plants are clusters of antheridia within the androecium. Flowers that bear a gynoecium but no stamens are called ''pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
