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Cyclamen Rohlfsianum
''Cyclamen rohlfsianum'' is a species of perennial plant in the family Primulaceae. It is endemic to Libya. It grows from a tuber in shrubland, especially in limestone cracks, up to above sea level. It is one of the tenderest cyclamen species. The plant was discovered by Friedrich Gerhard Rohlfs in 1879, and was named after him in 1897 by Paul Friedrich August Ascherson. Description Its tubers are round when young, but become irregular with age, with multiple growing points across the surface of the tuber. Cyclamen 2009. Scottish Rock Garden Club Forum. '''' also has irregular older tubers. Its |
Paul Friedrich August Ascherson
Paul Friedrich August Ascherson (June 4, 1834 – March 6, 1913) was a German botanist. His author citation is ''Asch.'', although ''Aschers.'' has been used in the past. Ascherson was born in Berlin in 1834 as the son of health counsellor. In 1850, he started studying medicine at the University of Berlin, but soon started getting more interested in botany. In 1855, he received his doctorate for a dissertation about the flora of the Margraviate of Brandenburg. In the 1850s, he started to botanize in Saxony, including several excursions with Ludwig Schneider and Gustav Maass. In 1860, Ascherson became an assistant at the Botanical Garden in Berlin; in 1865 he also started working at the Royal Herbarium. In 1863, he obtained his habilitation for specific botany and plant geography. In 1873, Ascherson became associate professor at the University of Berlin. He accompanied Friedrich Gerhard Rohlfs on his 1873/74 expedition in the Libyan desert. After 1876, he went on further expedit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphere
A sphere () is a Geometry, geometrical object that is a solid geometry, three-dimensional analogue to a two-dimensional circle. A sphere is the Locus (mathematics), set of points that are all at the same distance from a given point in three-dimensional space.. That given point is the centre (geometry), centre of the sphere, and is the sphere's radius. The earliest known mentions of spheres appear in the work of the Greek mathematics, ancient Greek mathematicians. The sphere is a fundamental object in many fields of mathematics. Spheres and nearly-spherical shapes also appear in nature and industry. Bubble (physics), Bubbles such as soap bubbles take a spherical shape in equilibrium. spherical Earth, The Earth is often approximated as a sphere in geography, and the celestial sphere is an important concept in astronomy. Manufactured items including pressure vessels and most curved mirrors and lenses are based on spheres. Spheres rolling, roll smoothly in any direction, so mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclamen
''Cyclamen'' ( or ) is a genus of 23 species of perennial flowering plants in the family Primulaceae. ''Cyclamen'' species are native to Europe and the Mediterranean Basin east to the Caucasus and Iran, with one species in Somalia. They grow from tubers and are valued for their flowers with upswept petals and variably patterned leaves. It was traditionally classified in the family Primulaceae, was reclassified in the family Myrsinaceae in 2000 and finally, in 2009 with the introduction of the APG III system, was returned to the subfamily Myrsinoideae within the family Primulaceae. Names ''Cyclamen'' is Medieval Latin, from earlier Latin ''cyclamīnos'', from Ancient Greek κυκλάμινος, ''kyklā́mīnos'' (also ''kyklāmī́s''), from κύκλος, ''kýklos'' "circle", because of the round tuber. In English the species of the genus are commonly called by the genus name. In many languages cyclamen species are colloquially called by a name like the English sow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclamen Africanum
''Cyclamen africanum'' is a species of flowering plant in the family Primulaceae. It is referred to by the common name African cyclamen and is a perennial growing from a tuber, native to northern Algeria, Morocco and Tunisia. It is similar to ''Cyclamen hederifolium'', but not frost- hardy. Description The tuber produces roots from the top, sides, and bottom, unlike ''Cyclamen hederifolium'', which produces roots from the top and sides, but not the bottom. Both the leaves and flowers are similar to ''Cyclamen hederifolium'', but are larger on average. Leaf and flower stalks extend straight up from the tuber; in ''Cyclamen hederifolium'' the leaf stalks extend outwards before bending up, forming an "elbow". ''Cyclamen africanum'' crosses easily with ''Cyclamen hederifolium''. Plants sold by nurseries are often hybrids between the two species (''Cyclamen'' ×''hildebrandii'' O. Schwarz). This robust hybrid is more hardy than ''Cyclamen africanum'' and can be planted outside in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclamen Graecum
''Cyclamen graecum'', the Greek cyclamen, is a perennial plant in the flowering plant family Primulaceae that grows from a tuber. It is native to southern Greece, southern Turkey and neighboring islands and is prized for its variable leaf forms, which include some of the most striking of any cyclamen. Distribution ''Cyclamen graecum'' is native to a wide variety of areas up to elevation in southern mainland Greece, the Peloponnese, Aegean Islands, Crete, the southern coast of Turkey, and northern Cyprus. Description The tuber is corky, with a thick, strong, fleshy anchor, and roots sprouting from the center of the bottom. The leaves are heart-shaped and toothed. The flowers bloom in autumn, with five petals which are white or pink with a darker blotch at the nose. They are often fragrant. The bases of the petals are curled outwards into auricles. After pollination, the flower stem coils in both directions, starting from the center, not from the top as in ''Cyclamen hederif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dodecatheon
''Primula'' sect. ''Dodecatheon'' is a section of herbaceous flowering plants in the family Primulaceae. ''Primula'' species in this section were formerly placed in a separate genus, ''Dodecatheon''. The species have basal clumps of leaves and nodding flowers that are produced at the top of tall stems rising from where the leaves join the crown. The genus is largely confined to North America and part of northeastern Siberia. Common names include shooting star, American cowslip, mosquito bills, mad violets, and sailor caps. A few species are grown in gardens for their showy and unique flower display. The stamens are thrust out with the sepals bent back. The flowers are pollinated by bees, which grab hold of the petals, and gather pollen by vibrating the flowers by buzzing their wings (buzz pollination). The vibration releases pollen from the anthers. Taxonomy Carl Linnaeus created the genus ''Dodecatheon'' in ''Species Plantarum'' in 1753. ''Dodecatheon'' could be distinguished ... [...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] |
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] |
Flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing (fusion of sperm and eggs from different individuals in a population) resulting from cross-pollination or allow selfing (fusion of sperm and egg from the same flower) when self-pollination occurs. There are two types of pollination: self-pollination and cross-pollination. Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is when pollen is transferred from the anther of one flower to the stigma of another flower on a different individual of the same species. Self-pollination happens in flowers where the stamen and carpel mature at the same time, and are positi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclamen Hederifolium
''Cyclamen hederifolium'', the ivy-leaved cyclamen or sowbread, is a species of flowering plant in the family Primulaceae. This widespread cyclamen species is widely cultivated and among the most hardy and vigorous in oceanic climates. It is native to woodland, shrubland, and rocky areas in the Mediterranean region from southern France to western Turkey and on Mediterranean islands, and naturalized farther north in Europe and in the Pacific Northwest. Names The species name ''hederifolium'' comes from the Latin ''hedera'' (ivy) and ''folium'' (leaf), because of the shape and patterning of the leaves. The older species name, ''neapolitanum'', refers to Naples, where the species grows. Description ''Cyclamen hederifolium'' is a tuberous perennial that blooms and sprouts leaves in autumn, grows through the winter, and goes dormant before summer, when the seed capsules ripen and open. Tuber The tuber is round-flattened and produces roots from the top and sides, leaving the base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaf
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the shoot system. In most leaves, the primary photosynthetic tissue is the palisade mesophyll and is located on the upper side of the blade or lamina of the leaf but in some species, including the mature foliage of ''Eucalyptus'', palisade mesophyll is present on both sides and the leaves are said to be isobilateral. Most leaves are flattened and have distinct upper (adaxial) and lower ( abaxial) surfaces that differ in color, hairiness, the number of stomata (pores that intake and output gases), the amount and structure of epicuticular wax and other features. Leaves are mostly green in color due to the presence of a compound called chlorophyll that is essential for photosynthesis as it absorbs light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclamen Purpurascens
''Cyclamen purpurascens'', the Alpine, European or purple cyclamen, is a species of flowering plant in the genus ''Cyclamen'' of the family (biology), family Primulaceae, native plant, native to central Europe, northern Italy, and Slovenia. It is an evergreen tuberous perennial plant, perennial with (usually) variegated leaves, and deep pink flowers in summer. Etymology The species name ''purpurāscēns'' is a present tense, present participle from the Latin verb ''purpurāscō'' "become purple". Distribution ''Cyclamen purpurascens'' grows in deciduous or mixed woodland, especially among beeches and over limestone, at above sea level in continental Europe from eastern France across the Alps to Poland and south to Bosnia and Herzegovina. It is also found in mountainous parts of Romania and western Russia, where it has been introduced species, introduced. Description File:Illustration Cyclamen purpurascens0.jpg, Whole plant (Otto Wilhelm Thomé, Thomé, ''commons:Flora von Deu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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