Kalanchoe beharensis genannt, ist eine Pflanzenart der Gattung Kalanchoe in der Familie der Dickblattgewächse (Crassulaceae). Sie ist eine der größten Arten der Gattung.
Kalanchoe beharensis sind 2 bis 3 Meter hohe Sträucher. Die basal einfachen Triebe haben eine harzige Rinde. Darüber verzweigen sie sich, sind aufrecht, kräftig und flaumhaarig, mit Durchmessern von 2 bis 12 Zentimetern. Die Triebe haben auffällige, mit scharfen Fortsätzen auf beiden Seiten versehene Blattnarben. Die wenigen Laubblätter stehen an 4 bis 10 Zentimeter langen, fleischigen, drehrunden Blattstielen und sind an den Triebspitzen dicht gedrängt. Die Blattspreite ist 7 bis 40 Zentimeter lang und 8 bis 30 Zentimeter breit, kahl, bläulich bis mehr oder weniger dicht weiß bis bräunlich und flaumhaarig mit sternförmigen Haaren. Sie ist an der Spitze zugespitzt und an der Basis ausgerandet.
Die vielblütigen, achselständigen Blütenstände bilden 20 bis 30 Zentimeter hohe Rispen. Der Blütenstandsstiel wird 40 bis 50 Zentimeter. Die Blüten sitzen an 4 bis 13 Millimeter langen Blütenstielen, stehen in alle Richtungen ab und sind stark flaumhaarig. Der röhrenförmige Kelch ist gelbgrün mit rötlichen Linien und hat dreieckige, zugespitzte Zipfel. Die urnenförmige Blütenkrone ist rosagrünlich bis grüngelb und bildet eine 6 bis 10 Millimeter lange Röhre. Die Zipfel sind eiförmig, zugespitzt und werden 5 bis 13 Millimeter lang und 3 bis 6 Millimeter breit. Die Staubblätter sind nahe der Spitze der Kronröhre angeheftet und ragen über die Röhre heraus. Das Fruchtblatt ist 5 bis 12 Millimeter lang. Der Griffel hat eine Länge von 5 bis 10 Millimeter.
Die Früchte sind aufrechte Balgfrüchte, die zahlreiche, verkehrt eiförmige, 0,7 Millimeter große Samen enthalten.
Die Erstbeschreibung erfolgte 1903 durch Emmanuel Drake del Castillo.[1] Die Art steht auf der Roten Liste der IUCN und gilt als gefährdet (Vulnerable).[2]
Synonyme sind Kalanchoe vantieghemii Raym.-Hamet, Kalanchoe beharensis var. aureo-aeneus H.Jacobsen (nom. inval., Art, 36.1, 37.1) und Kalanchoe beharensis var. subnuda H.Jacobsen (nom. inval., Art, 36.1, 37.1).
Die Chromosomenzahl ist 2 n = 36 {displaystyle 2n=36} 
Kalanchoe beharensis ist im Süden und Südwesten von Madagaskar in Trockenwäldern auf unterschiedlichen Böden verbreitet.
Kalanchoe beharensis genannt, ist eine Pflanzenart der Gattung Kalanchoe in der Familie der Dickblattgewächse (Crassulaceae). Sie ist eine der größten Arten der Gattung.
Kalanchoe beharensis (commonly known as elephant's ear kalanchoe, felt bush, or feltbush) is a plant species in the succulent genus Kalanchoe, and the family Crassulaceae. Kalanchoe beharensis is native to Madagascar[1] known by local names mongy, rongy and tavitavy.[2]
Kalanchoe beharensis is an evergreen shrub, 3–5 ft (1–2 m) tall.[3] The stem is about 1.5 m (4.9 ft) long, slender and knotted. Leaves are olive green, triangular-lanceolate shaped, decussately arranged (pairs at right-angles to each other) with leaf margins that are doubly crenate (crinkled). Each leaf is about 10 cm (4 in) long and 5–10 cm (2–4 in) wide. The bottoms of the leaves are glabrous (smooth and glossy), and covered with a woolly hair towards the apex. The leaf hairs are brown, and the tips of the teeth are darker. The hairs on the stem, younger leaves, and petioles (leaf stalks) are white. A sign of older leaves is concavity on the upper surface. Inflorescences are 50–60 cm (20–24 in) high, forming a branched corymb. Flowers are on short pedicels (stalks). The calyx is 7 mm long with lobes that are oblong and acuminate (tapering to a point). The corolla tube is urn-shaped and 7 mm long.[4] Blooming occurs from spring to summer, and flowers are small and yellowish.[5]
The types of trichome present on the leaves of Kalanchoe vary among the different species. The different types of trichomes are an indicator of adaptation to a particular environment. On the leaf blade of K. beharensis there are trichomes of the non-glandular, bushy three-branched type. This type of trichome is dead, with evidence of tannin. K. beharensis trichomes are also characterized by striped cuticular ornamentation on their surface. Glandular trichomes are also present on the leaves, with more on petioles than on leaf blades, and more on the top of the leaf as opposed to the bottom.[6]
The genus Kalanchoe may reproduce asexually by producing plantlets on leaf margins, which when distributed on a suitable substrate will form new plants. Plantlet-forming species fall under two categories. The first category is induced plantlet-forming species that produce plantlets under stress. The second plantlet-forming species is constitutive plantlet-forming species that spontaneously forms plantlets. Induced plantlet-forming species have the LEC1 gene that allows them to produce seeds, whereas the constitutive plantlet-forming species have a defective LEC1 gene and cannot produce seeds.[7] K. beharensis produces seeds as well as plantlets.[8]
Kalanchoe beharensis uses a system of defense, not unique to this plant, termed stress-limited defence. This system involves deterring herbivores (plant eating creatures) before a high stress level ensues causing cracking in the tissue of the plant. High hardness, a structural component of this system, is characterized by tissues with high density. Since the tissues of plants employing this defense system have a high density, the defenses, commonly spines, prickles, thorns and hair, must reside on the surface of the plant. Amorphous silica is found in the defense structures with a microhardness of about 5000 MPa,[9] which is higher than the microhardness of insects, and of mammalian enamel with a microhardness of 3500 MPa.[10] Through research, this defense system is shown to decrease the amount of plant matter eaten by vertebrate herbivores by reducing the size of the bite a herbivore takes, the volume of a bite, or the rate at which biting occurs.[11]
The first field study of crassulacean acid metabolism, a type of carbon fixation, has been done on Kalanchoe beharensis ‘Drake del Castillo’, in a paper by Kluge et al. entitled "In situ studies of crassulacean acid metabolism in Kalanchoe beharensis Drake Del Castillo, a plant of the semi-arid southern region of Madagascar." The study includes information on diel patterns of CO2 exchange and transpiration. It also includes measurements of fluctuations in organic acid levels, PEP carboxylase properties and water relations. Some conclusions of this study are that Kalanchoe beharensis advantageously performs CAM fully during the entire arid seasons, avoiding CAM idling. It can do this because of its ability to maintain the correct water balance in its leaves, even in periods of drought.[12]
It may be grown as a houseplant or outdoors in mostly frost-free landscapes and is not toxic to dogs if it has not been treated with any chemicals (according to the National Animal Poison Information network).[13] This plant needs full to partial sun, with intermediate to warm temperatures above 5 °C (41 °F).[14] It will survive frost on a scale from light to moderate.[15] For growth in a greenhouse K. beharensis will grow in a mixture of equally distributed loam and sand, and gravel for drainage. The plant should be dry before watering again, as too much water will kill it. Watering should occur every 14–20 days during the growing season. In the winter months it should be watered sparingly. The species is resilient and will survive if neglected.[16]
Propagation is by seed,[17] stem cuttings, or by leaf cuttings, in which the mid rib should be cut in various places. The cuttings should be grown on a sandy substrate.[18] In many instances, numerous varieties of Kalanchoe will not only root from freshly pruned leaves, they will form new baby plantlets right from the very center of the removed leaf.
The species[14] and the cultivar 'Fang'[19] have gained the Royal Horticultural Society's Award of Garden Merit.[20] Fang was hybridized originally by crossing K. beharensis with K. tomentosa.
{{cite encyclopedia}}: CS1 maint: url-status (link) Kalanchoe beharensis (commonly known as elephant's ear kalanchoe, felt bush, or feltbush) is a plant species in the succulent genus Kalanchoe, and the family Crassulaceae. Kalanchoe beharensis is native to Madagascar known by local names mongy, rongy and tavitavy.
Kalanchoe beharensis es una especie en el género Kalanchoe, endémica de Madagascar.
Planta suculenta que puede alcanzar más de 3 m de altura. De porte erecto, con tallo delgado de color gris y aspecto afelpado y nudoso debido a las hojas que va perdiendo al crecer. Hojas carnosas con peciolos que miden 3-4 cm, decusadas, triangular-lanceoladas de entre 10 y 20 cm de largo por 5-10 de ancho con márgenes que poseen un doble festón. Son de color verde oliva con una vellosidad fina de apariencia aterciopelada y color tostado o azulado en ambas caras. Las hojas viejas están plegadas en su mitad apical. Inflorescencia terminal de 50-60 cm de largo que forma un corimbo ligeramente colgante, muy ramificado y velloso. Las flores, de color verde amarillento, poseen pedúnculos cortos, 4 pétalos casi totalmente soldados y corola en forma de jarrón de unos 7 mm. Florece a principios de la primavera.
Su cultivo como planta de interior decorativa es muy fácil. Se puede cultivar al aire libre en climas donde la temperatura mínima no baje de 7 ºC ya que, aunque tolera más frío, puede perder las hojas. La propagación es hace por esqueje, semillas o rompiendo una hoja, que se mantiene a la sombra durante dos o tres días y se planta cubriéndola parcialmente de sustrato.
Kalanchoe beharensis fue descrita por Emmanuel Drake del Castillo y publicado en Bulletin du Muséum d'Histoire Naturelle 9: 41. 1903.[1]
Ver: Kalanchoe
beharensis: epíteto geográfico que alude a su localización en Behara en Madagascar.
Kalanchoe beharensis, le Kalanchoé de Behara, ou Kalanchoé à oreilles d'éléphant[1] est une plante vivace succulente de la famille des Crassulaceae, originaire du Behara à Madagascar.
Synonyme[2] :
Kalanchoe van-tieghemii Raym.-Hamet.
La plante récoltée au Behara à Madagascar en juillet 1901 a été décrite par le botaniste français Drake del Castillo[3] dans le Bulletin du Muséum national d'histoire naturelle, tome 9, 1903.
Le Kalanchoé de Behara est un arbuste succulent pouvant atteindre 3 m de haut[4]. De port ramifié, il s'élargit en grandissant et perd ses feuilles basses en laissant de grandes cicatrices[1] creuses, dont le rebord durci, aigu et blessant joue très efficacement le rôle de piquants courts.
Les feuilles rassemblées à l'extrémité des tiges, sont opposées, décussées, charnues, très duveteuses[5], douces comme du velours, de couleur vert clair à bleuté, devenant bronze au soleil, de 10 à 30 cm (ou plus) de long sur 10 à 20 cm de large, triangulaires à largement ovées-lancéolées, à grands lobes, et marge ondulée, crantée.
Une grande hampe florale axillaire (jusqu'à 60 cm de haut) porte une inflorescence paniculiforme, ramifiée en cymes[6], groupant des fleurs érigées, velues. Le calice vert jaunâtre, est couvert de longs poils laineux, à 4 lobes triangulaires. La corolle tubulleuse, laineuse, s'ouvre en 4 lobes (pétales) blancs à jaunes, striés de rouge foncé à l'intérieur. Les 8 étamines sont fixées en deux verticilles distincts sur le tube corollien. Les 4 carpelles sont connivents.
Il existe plusieurs cultivars[7] : "Rose Leaf" (K. beharensis x K. tomentosa), "Oak Leaf" (K. beharensis x K. millotii), "Minima" aux feuilles allongées vert pâle, "Rusty", etc.
Kalanchoe beharensis est endémique de Madagascar. Il est originaire du Behara, province d'Ambovombe.
Il croît dans le bush xérophytique.
Il a été introduit comme plante ornementale de jardin dans les régions tropicales et plante de serres dans les régions tempérées.
Le kalanchoé de Behara demande à être installé en plein soleil, avec un arrosage modéré. Il se cultive sur un sol bien drainé, humifère, assez sablonneux.
Il est peu rustique ; la température minimale supportée est de 10 °C. La variété Fang gèle à −2 °C.
Feuilles triangulaires, Jardin du Luxembourg (Paris)
Inflorescence en boutons, Californie
Kalanchoe beharensis, le Kalanchoé de Behara, ou Kalanchoé à oreilles d'éléphant est une plante vivace succulente de la famille des Crassulaceae, originaire du Behara à Madagascar.
Synonyme :
Kalanchoe van-tieghemii Raym.-Hamet.
Kalanchoe beharensis (Drake, 1903) è una pianta succulenta appartenente alla famiglia delle Crassulaceae, endemica del Madagascar[2].
Ha foglie verdi-grigie di forma leggermente triangolare, lunghe circa 20 cm, dotate di piccoli peletti. Raggiunge lentamente i 3.5 o i 4 metri. A fine inverno produce fiori gialli.
Molto famosa anche una varietà di questa specie, la Kalanchoe beharensis cv. fang, con foglie leggermente tondeggianti lunghe non più di 7 cm dotate di punteggiature nere lungo i margini e di piccole escrescenze ruvide nelle pagina inferiore.
Kalanchoe beharensis (Drake, 1903) è una pianta succulenta appartenente alla famiglia delle Crassulaceae, endemica del Madagascar.
Kalanchoe beharensis é uma planta suculenta original de Madagascar do gênero Kalanchoe. Ela cresce em lugares secos ao abrigo da sombra.[1]
Kalanchoe beharensis é uma planta suculenta original de Madagascar do gênero Kalanchoe. Ela cresce em lugares secos ao abrigo da sombra.
Видова назва походить від назви села Бехар на Мадагаскарі, біля якого цей вид був знайдений.[2]
Напівкущевидна рослина з прямостоячими одиночними або слабо розгалуженими стеблами, заввишки до 3 м. Листя супротивні, черешкові з широкою округло-трикутною пластиною до 30 см завдовжки і до 15 см завширшки в основі. Мають хвилясто-зазубрені краї. Верхня сторона листка вогнута, покрита щільною рудуватою повстю. Нижня сторона опукла, має густе білувате опушення, таким сами опушенням цілком вкриті молоді листочки. Наприкінці зими у дорослих рослин на верхівці з'являються суцвіття до 60 см заввишки, з багатьма дрібними зеленувато-жовтими квітками, що мають фіолетові прожилки.
Батьківщина цієї рослини — південна частина острова Мадагаскар.
Невибалглива в культурі рослина, яку слід вирощувати в піщанистому, добре дренованому ґрунті при яскравому освітленні. У вегетаційний період рослини потребують помірного поливу, взимку — сухе утримання. Мінімальна температура 10 °C.
В культурі цвіте рідко. З віком втрачає листя і нижня частина рослини оголюється. Старі росллини періодично заміннють молодими паростками.
Розмножують стебловими живцями, які зазвичай укорінюють навесні або влітку у вологому субстраті.
Має низку сортів. Розповсюджений різновид aureo-aeneus з листям, що вкрите червонувато-коричневими волосками.
Kalanchoe beharensis là một loài thực vật có hoa trong họ Crassulaceae. Loài này được Drake miêu tả khoa học đầu tiên năm 1903.[1]
Bài viết chủ đề họ Lá bỏng này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Kalanchoe beharensis là một loài thực vật có hoa trong họ Crassulaceae. Loài này được Drake miêu tả khoa học đầu tiên năm 1903.
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