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Portulacaria Afra 2
''Portulacaria'' is a genus of succulent plant, classified in its own subfamily Portulacarioideae in the family Didiereaceae. It is indigenous to southern Africa. Taxonomy The genus was previously placed in the family Portulacaceae, but according to molecular studies is part of Didiereaceae. It has further been revised when phylogenetic tests showed conclusively that genus ''Ceraria'' was located within ''Portulacaria'', and all ''Ceraria'' species have consequently been renamed and moved into this genus. Species Species include: * ''Portulacaria afra'' Jacq. * '' Portulacaria armiana'' E. J. Van Jaarsveld * '' Portulacaria carrissoana''. Previously '' Ceraria carrissoana'' Excell & Mendonca * '' Portulacaria fruticulosa''. Previously '' Ceraria fruticulosa'' Pearson & Stephens * '' Portulacaria longipedunculata''. Previously '' Ceraria longipedunculata'' Merxm & Podlech * '' Portulacaria namaquensis''. Previously ''Ceraria namaquensis'' Sond. * '' Portulacaria pygmaea''. Prev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolaus Joseph Von Jacquin
Nikolaus Joseph Freiherr von Jacquin (16 February 172726 October 1817) was a scientist who studied medicine, chemistry and botany. Biography Born in Leiden in the Netherlands, he studied medicine at Leiden University, then moved first to Paris and afterward to Vienna. In 1752, he studied under Gerard van Swieten in Vienna. Between 1755 and 1759, Jacquin was sent to the West Indies, Central America, Venezuela and New Granada by Francis I to collect plants for the Schönbrunn Palace, and amassed a large collection of animal, plant and mineral samples. In 1797, Alexander von Humboldt profited from studying these collections and conversing with Jacquin in preparation of his own journey to the Americas. In 1763, Jacquin became professor of chemistry and mineralogy at the Bergakademie Schemnitz (now Banská Štiavnica in Slovakia). In 1768, he was appointed Professor of Botany and Chemistry and became director of the botanical gardens of the University of Vienna. For his work ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portulacaria Longipedunculata
''Portulacaria longipedunculata'' (previously ''Ceraria longipedunculata'' or ''Ceraria kaokoensis'') is a small-leaved succulent plant found in the far north of Namibia and into southern Angola , national_anthem = " Angola Avante"() , image_map = , map_caption = , capital = Luanda , religion = , religion_year = 2020 , religion_ref = , coordina .... Description It is a soft-wooded, deciduous shrub with long, thin, succulent leaves and bisexual flowers.P.Bruyns, M.Oliveira-Neto, G.F. Melo de Pinna, C.Klak: ''Phylogenetic relationships in the Didiereaceae with special reference to subfamily Portulacarioideae''. Taxon 63 (5). October 2014. 1053-1064. References {{Taxonbar, from=Q19630681 longipedunculata Flora of Angola Flora of Namibia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caryophyllales Genera
Caryophyllales ( ) is a diverse and heterogeneous order of flowering plants that includes the cacti, carnations, amaranths, ice plants, beets, and many carnivorous plants. Many members are succulent, having fleshy stems or leaves. The betalain pigments are unique in plants of this order and occur in all its families with the exception of Caryophyllaceae and Molluginaceae. Description The members of Caryophyllales include about 6% of eudicot species. This order is part of the core eudicots. Currently, the Caryophyllales contains 37 families, 749 genera, and 11,620 species The monophyly of the Caryophyllales has been supported by DNA sequences, cytochrome c sequence data and heritable characters such as anther wall development and vessel-elements with simple perforations. Circumscription As with all taxa, the circumscription of Caryophyllales has changed within various classification systems. All systems recognize a core of families with centrospermous ovules and seeds. More ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portulacaria
''Portulacaria'' is a genus of succulent plant, classified in its own subfamily Portulacarioideae in the family Didiereaceae. It is indigenous to southern Africa. Taxonomy The genus was previously placed in the family Portulacaceae, but according to molecular studies is part of Didiereaceae. It has further been revised when phylogenetic tests showed conclusively that genus ''Ceraria'' was located within ''Portulacaria'', and all ''Ceraria'' species have consequently been renamed and moved into this genus. Species Species include: * ''Portulacaria afra'' Jacq. * '' Portulacaria armiana'' E. J. Van Jaarsveld * '' Portulacaria carrissoana''. Previously '' Ceraria carrissoana'' Excell & Mendonca * '' Portulacaria fruticulosa''. Previously '' Ceraria fruticulosa'' Pearson & Stephens * '' Portulacaria longipedunculata''. Previously '' Ceraria longipedunculata'' Merxm & Podlech * ''Portulacaria namaquensis''. Previously ''Ceraria namaquensis'' Sond. * '' Portulacaria pygmaea''. Previ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crassulaceae
The Crassulaceae (from Latin ''crassus'', thick), also known as the stonecrop family or the orpine family, are a diverse family of dicotyledon flowering plants characterized by succulent leaves and a unique form of photosynthesis, known as Crassulacean acid metabolism (CAM). Flowers generally have five floral parts. Crassulaceae are usually herbaceous but there are some subshrubs, and relatively few treelike or aquatic plants. Crassulaceae are a medium size monophyletic family in the core eudicots, among the order Saxifragales, whose diversity has made infrafamilial classification very difficult. The family includes approximately 1,400 species and 34–35 genera, depending on the circumscription of the genus ''Sedum'', and distributed over three subfamilies. Members of the Crassulaceae are found worldwide, but mostly in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce, although a few are aquatic. Crassulaceae are mainly pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crassulacean Acid Metabolism
Crassulacean acid metabolism, also known as CAM photosynthesis, is a carbon fixation pathway that evolved in some plants as an adaptation to arid conditions that allows a plant to photosynthesize during the day, but only exchange gases at night. In a plant using full CAM, the stomata in the leaves remain shut during the day to reduce evapotranspiration, but they open at night to collect carbon dioxide () and allow it to diffuse into the mesophyll cells. The is stored as four-carbon malic acid in vacuoles at night, and then in the daytime, the malate is transported to chloroplasts where it is converted back to , which is then used during photosynthesis. The pre-collected is concentrated around the enzyme RuBisCO, increasing photosynthetic efficiency. This mechanism of acid metabolism was first discovered in plants of the family Crassulaceae. Historical background Observations relating to CAM were first made by de Saussure in 1804 in his ''Recherches Chimiques sur la Végétatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C3 Carbon Fixation
carbon fixation is the most common of three metabolic pathways for carbon fixation in photosynthesis, along with and CAM. This process converts carbon dioxide and ribulose bisphosphate (RuBP, a 5-carbon sugar) into two molecules of 3-phosphoglycerate through the following reaction: :CO2 + H2O + RuBP → (2) 3-phosphoglycerate This reaction was first discovered by Melvin Calvin, Andrew Benson and James Bassham in 1950. C3 carbon fixation occurs in all plants as the first step of the Calvin–Benson cycle. (In and CAM plants, carbon dioxide is drawn out of malate and into this reaction rather than directly from the air.) Plants that survive solely on fixation ( plants) tend to thrive in areas where sunlight intensity is moderate, temperatures are moderate, carbon dioxide concentrations are around 200 ppm or higher, and groundwater is plentiful. The plants, originating during Mesozoic and Paleozoic eras, predate the plants and still represent approximately 95% of Eart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceraria Pygmaea
''Portulacaria pygmaea'' (previously ''Ceraria pygmaea''), also known as the pygmy porkbush, is a small-leaved dwarf succulent plant found on the border between Namibia and South Africa. Description It is a small, compact, soft-wooded, dwarf shrub with Unisexual flowers(dioecious). Its blue-green leaves are semi-evergreen. Its tiny compact branches spread, and often droop, staying close to the ground. It also develops a thick caudex or root-stock, which has led to it being a popular bonsai specimen. Within the genus ''Portulacaria'' it is most closely related to its larger sister-species ''Portulacaria fruticulosa ''Portulacaria fruticulosa'' (previously ''Ceraria fruticulosa'' or ''Ceraria schaeferi'') is a succulent plant found on the border between Namibia and South Africa. Description It is a soft-wooded deciduous shrub with flat, round succulent leav ...''.P.Bruyns, M.Oliveira-Neto, G.F. Melo de Pinna, C.Klak: ''Phylogenetic relationships in the Didiereaceae with specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portulacaria Pygmaea
''Portulacaria pygmaea'' (previously ''Ceraria pygmaea''), also known as the pygmy porkbush, is a small-leaved dwarf succulent plant found on the border between Namibia and South Africa. Description It is a small, compact, soft-wooded, dwarf shrub with Unisexual flowers(dioecious). Its blue-green leaves are semi-evergreen. Its tiny compact branches spread, and often droop, staying close to the ground. It also develops a thick caudex or root-stock, which has led to it being a popular bonsai specimen. Within the genus ''Portulacaria'' it is most closely related to its larger sister-species ''Portulacaria fruticulosa ''Portulacaria fruticulosa'' (previously ''Ceraria fruticulosa'' or ''Ceraria schaeferi'') is a succulent plant found on the border between Namibia and South Africa. Description It is a soft-wooded deciduous shrub with flat, round succulent leav ...''.P.Bruyns, M.Oliveira-Neto, G.F. Melo de Pinna, C.Klak: ''Phylogenetic relationships in the Didiereaceae with specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceraria Namaquensis
''Ceraria namaquensis'', with the common names Namaqua porkbush and Namaqua portulacaria, is a species of succulent shrub, native to the border between South Africa and Namibia. The plant's current name is ''Portulacaria namaquensis'', due to recent phylogenetic studies have shown that it is in fact located within the genus ''Portulacaria''.P.Bruyns, M.Oliveira-Neto, G.F. Melo de Pinna, C.Klak: ''Phylogenetic relationships in the Didiereaceae with special reference to subfamily Portulacarioideae''. Taxon 63 (5). October 2014. 1053-1064. Its closest relative is the species ''Portulacaria armiana'' Distribution The natural habitat of this species extends along the Orange River valley, along the border between Namibia and South Africa. It has also been recorded near the coast slightly further north in Namibia.''Annals of the South African Museum'' 9: 33. 1912. (Ann. S. African Mus.) This is an extremely arid, winter-rainfall area. In cultivation, it requires extremely well-drain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portulacaria Namaquensis
''Ceraria namaquensis'', with the common names Namaqua porkbush and Namaqua portulacaria, is a species of succulent shrub, native to the border between South Africa and Namibia. The plant's current name is ''Portulacaria namaquensis'', due to recent phylogenetic studies have shown that it is in fact located within the genus ''Portulacaria''.P.Bruyns, M.Oliveira-Neto, G.F. Melo de Pinna, C.Klak: ''Phylogenetic relationships in the Didiereaceae with special reference to subfamily Portulacarioideae''. Taxon 63 (5). October 2014. 1053-1064. Its closest relative is the species '' Portulacaria armiana'' Distribution The natural habitat of this species extends along the Orange River valley, along the border between Namibia and South Africa. It has also been recorded near the coast slightly further north in Namibia.''Annals of the South African Museum'' 9: 33. 1912. (Ann. S. African Mus.) This is an extremely arid, winter-rainfall area. In cultivation, it requires extremely well-drai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceraria Longipedunculata
''Portulacaria longipedunculata'' (previously ''Ceraria longipedunculata'' or ''Ceraria kaokoensis'') is a small-leaved succulent plant found in the far north of Namibia and into southern Angola , national_anthem = " Angola Avante"() , image_map = , map_caption = , capital = Luanda , religion = , religion_year = 2020 , religion_ref = , coordina .... Description It is a soft-wooded, deciduous shrub with long, thin, succulent leaves and bisexual flowers.P.Bruyns, M.Oliveira-Neto, G.F. Melo de Pinna, C.Klak: ''Phylogenetic relationships in the Didiereaceae with special reference to subfamily Portulacarioideae''. Taxon 63 (5). October 2014. 1053-1064. References {{Taxonbar, from=Q19630681 longipedunculata Flora of Angola Flora of Namibia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
