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Stangeria
''Stangeria eriopus'' is a cycad endemic to southern Africa. It is the sole species in the genus ''Stangeria'', most closely related to the Australian genus ''Bowenia'', with which it forms the family Stangeriaceae. Description ''Stangeria eriopus'' is a very long-lived, perennial, evergreen cycad. The stalked, feathered, fern-like leaves are between 25 centimeters and two meters long, with the petiole comprising one third to one half of the overall length (in both varieties). They are pinnately-veined, which distinguishes the species from all other cycads. The petiole comprises half the length of the leaf. The young leaves are bent in bud position, the tip appears rolled up. Young leaves are dotted with short, gray hairs (trichomes), which usually fall off quickly and only stick to the petiole. These trichomes are unbranched and transparent or colored. The species occurs as two variable forms or varieties. The forest form, growing in regions with higher rainfall, is characterize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stangeria Lignotuber
''Stangeria eriopus'' is a cycad endemic to southern Africa. It is the sole species in the genus ''Stangeria'', most closely related to the Australian genus ''Bowenia'', with which it forms the family Stangeriaceae. Description ''Stangeria eriopus'' is a very long-lived, perennial, evergreen cycad. The stalked, feathered, fern-like leaves are between 25 centimeters and two meters long, with the petiole comprising one third to one half of the overall length (in both varieties). They are pinnately-veined, which distinguishes the species from all other cycads. The petiole comprises half the length of the leaf. The young leaves are bent in bud position, the tip appears rolled up. Young leaves are dotted with short, gray hairs ( trichomes), which usually fall off quickly and only stick to the petiole. These trichomes are unbranched and transparent or colored. The species occurs as two variable forms or varieties. The forest form, growing in regions with higher rainfall, is characteriz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stangeriaceae
Stangeriaceae is the smallest family of the cycads, including only two extant genera, '' Stangeria'' and ''Bowenia'', which both have an underground stem. Taxonomy Although the family was first published by Schimper and Schenk as Stangerieae, the name Stangeriaceae was used by Johnson (who was unaware of previous uses) to include only the genus ''Stangeria.'' Later, Stevenson expanded the family to include ''Bowenia.'' This decision was based on some shared characters (synapomorphies) such as the presence of fused vacularized stipules, the lack or irregular production of cataphylls, and a few other anatomical and morphological traits. Later molecular evidence suggested that the two genera of the Stangeriaceae belonged in different positions within the Zamiaceae, thus leading other authors to propose dissolving the family. Genera * Subfamily Stangerioideae *** '' Stangeria '' Moore (1 species) * Subfamily Bowenioideae *** ''Bowenia'' Hooker ex Hooker f. (2 species) *** † ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycad
Cycads are seed plants that typically have a stout and woody (ligneous) trunk (botany), trunk with a crown (botany), crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, that is, individual plants of a species are either male or female. Cycads vary in size from having trunks only a few centimeters to several meters tall. They typically grow very slowly and live very long. Because of their superficial resemblance, they are sometimes mistaken for Arecaceae, palms or ferns, but they are not closely related to either group. Cycads are gymnosperms (naked-seeded), meaning their fertilization, unfertilized seeds are open to the air to be directly fertilized by pollination, as contrasted with angiosperms, which have enclosed seeds with more complex fertilization arrangements. Cycads have very specialized pollinators, usually a specific species of beetle. Both male and female cycads bear cones (strobilus, strobili), somewhat similar to conife ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bowenia
The genus ''Bowenia'' includes two living and two fossil species of cycads in the family Stangeriaceae, sometimes placed in their own family Boweniaceae. They are entirely restricted to Australia. The two living species occur in Queensland. ''B. spectabilis'' grows in warm, wet, tropical rainforests, on protected slopes and near streams, primarily in the lowlands of the Wet Tropics Bioregion. However, it has a local form with serrate pinna margins that grows in rainforest, ''Acacia''-dominated transition forest, and also ''Casuarina''-dominated sclerophyll forest on the Atherton Tableland, where it is subject to periodic bushfire. ''B. serrulata'' grows in sclerophyll forest and transition forest close to the Tropic of Capricorn. Species The fossil species ''Bowenia eocenica'' is known from deposits in a coal mine in Victoria, Australia, and ''B. papillosa'' is known from deposits in New South Wales. Both fossils are of Eocene age, and consist of leaf A lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Stanger (surveyor)
William Stanger (27 September 1811 in Tydd St. Mary, Wisbech – 14 March 1854 in Durban) was best known as a surveyor-general in South Africa, but was also a geologist, botanist and medical doctor. He was the son of Willam Stanger and Mary Dent. He studied medicine and natural science at Edinburgh University, and after returning from a trip to Australia and New Zealand, ran a practice in London for some time. William Stanger took part as geologist and doctor in the ill-fated 1841 British expedition to the Niger. Three vessels steamed about 320 miles up the Niger and Chadda. Treaties were signed with the two black Princes of Eboe and Iddah, agreeing to the abolition of the slave trade and of human sacrifices, and the signatories were then left to resume their normal practices. An extract from a letter written on board the "''Æthiope''" on 21 October 1841 - ''"We entered the Nun on the 10th inst., and proceeded up the river the next morning, and fell in with the "Albert" on t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aulacaspis Yasumatsui
''Aulacaspis yasumatsui'', or cycad aulacaspis scale (CAS), is a scale insect species in the genus '' Aulacaspis'' that feeds on cycad species such as ''Cycas revoluta''Aulacaspis yasumatsui (Hemiptera: Sternorrhyncha: Diaspididae), a Scale Insect Pest of Cycads Recently Introduced into Florida. Forrest W. Howard, Avas Hamon, Michael Mclaughlin, Thomas Weissling and Si-lin Yang, The Florida Entomologist, March 1999, Vol. 82, No. 1, pages 14–27article or '' Dioon purpusii'' (Purpus' cycad). Other common names include the cycad scale, the sago palm scale, and the Asian cycad scale. This is a serious pest of cycads which can kill its host plant. Description The adult female cycad aulacaspis scale has a flattened, circular or pear-shaped cover, often distorted in shape by the close proximity of leaf veins or other scale insects. The cover is white, and may be translucent enough to see the orange coloured insect with its orange eggs beneath. White or pale yellow shed skins are seen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cayman Islands
The Cayman Islands () is a self-governing British Overseas Territory—the largest by population in the western Caribbean Sea. The territory comprises the three islands of Grand Cayman, Cayman Brac and Little Cayman, which are located to the south of Cuba and northeast of Honduras, between Jamaica and Mexico's Yucatán Peninsula. The capital city is George Town on Grand Cayman, which is the most populous of the three islands. The Cayman Islands is considered to be part of the geographic Western Caribbean Zone as well as the Greater Antilles. The territory is a major world offshore financial centre for international businesses and wealthy individuals, largely as a result of the state not charging taxes on any income earned or stored. With a GDP per capita of $91,392, the Cayman Islands has the highest standard of living in the Caribbean. Immigrants from over 130 countries and territories reside in the Cayman Islands. History No archaeological evidence for an indigenous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CITES Appendix I
CITES (shorter name for the Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington Convention) is a multilateral treaty to protect endangered plants and animals from the threats of international trade. It was drafted as a result of a resolution adopted in 1963 at a meeting of members of the International Union for Conservation of Nature (IUCN). The convention was opened for signature in 1973 and CITES entered into force on 1 July 1975. Its aim is to ensure that international trade (import/export) in specimens of animals and plants included under CITES, does not threaten the survival of the species in the wild. This is achieved via a system of permits and certificates. CITES affords varying degrees of protection to more than 38,000 species. , Secretary-General of CITES is Ivonne Higuero. Background CITES is one of the largest and oldest conservation and sustainable use agreements in existence. There are three working langu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bordered to the north by Myanmar and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and the extremity of Myanmar. Thailand also shares maritime borders with Vietnam to the southeast, and Indonesia and India to the southwest. Bangkok is the nation's capital and largest city. Tai peoples migrated from southwestern China to mainland Southeast Asia from the 11th century. Indianised kingdoms such as the Mon, Khmer Empire and Malay states ruled the region, competing with Thai states such as the Kingdoms of Ngoenyang, Sukhothai, Lan Na and Ayutthaya, which also rivalled each other. European contact began in 1511 with a Portuguese diplomatic mission to Ayutthaya, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callioratis Millari
''Callioratis'' is a genus of moths in the family Geometridae The geometer moths are moths belonging to the family Geometridae of the insect order Lepidoptera, the moths and butterflies. Their scientific name derives from the Ancient Greek ''geo'' γεω (derivative form of or "the earth"), and ''met .... Species * '' Callioratis abraxas'' Felder, 1874 * '' Callioratis apicisecta'' Prout, 1915 * '' Callioratis abraxis'' * '' Callioratis millarii'' * '' Callioratis boisduvalii'' * '' Callioratis grandis'' References ''Callioratis''at Markku Savela's ''Lepidoptera and Some Other Life Forms'' Natural History Museum Lepidoptera genus database Ennominae {{Ennominae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guignardia Mangiferae
''Guignardia mangiferae'' is a plant pathogen Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomyc .... References External links Fungal plant pathogens and diseases Botryosphaeriaceae Fungi described in 1968 {{fungus-plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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