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Ranunculus adoneus ist eine Pflanzenart aus der Familie der Hahnenfußgewächse.
Die Stängel sind 9 bis 25 Zentimeter hoch, aufrecht und unbehaart. Jeder Stängel trägt ein bis drei Blüten. Die Wurzeln sind schlank und 0,8 bis 1,4 Millimeter dick. Die Grundblätter sind bleibend. Ihre Blattspreite ist 0,9 bis 2,5 × 1,1 bis 2,8 Zentimeter groß, kreis- bis nierenförmig und zwei- bis dreimal in linealische Segmente geteilt. Der Blattrand ist ganz, die Blattbasis stumpf und die Blattenden der Segmente spitz bis eng abgerundet. Der Blütenstiel ist unbehaart. Der Blütenboden ist unbehaart. Die Kelchblätter sind 4 bis 11 × 3 bis 7 Millimeter groß. Ihre Unterseite ist spärlich mit farblosen Haaren bedeckt. Die 5 bis 10 Kronblätter sind 8 bis 15 × 8 bis 19 Millimeter groß. Die Nektardrüse ist unbehaart. Die Köpfe der Achänen sind 6 bis 12 × 5 bis 9 Millimeter groß und eiförmig. Die Achänen sind völlig oder fast unbehaart und 1,8 bis 2,4 × 1 bis 1,4 Millimeter groß. Der Schnabel ist 1,2 bis 1,7 Millimeter lang, pfriemlich und gerade.
Die Chromosomenzahl beträgt 2n = 16.
Die Art blüht von Mai bis September.
Ranunculus adoneus kommt in Colorado, Idaho, Montana, Nevada, Utah und Wyoming vor. Die Art wächst in der alpinen und subalpinen Stufe auf Grünland in Höhenlagen von 2500 bis 4000 Meter. Sie ist für gewöhnlich um abschmelzende Schneeablagerungen herum anzutreffen.
Ranunculus adoneus wurde 1863 von Asa Gray erstbeschrieben.
Ranunculus adoneus ist eine Pflanzenart aus der Familie der Hahnenfußgewächse.
Ranunculus adoneus, the alpine buttercup[2] or snow buttercup, is a species of flowering plant. It is an alpine buttercup from the family Ranunculaceae. This species is mainly found in the Rocky Mountains in Colorado and Wyoming but can also be found in Idaho, northern Utah and eastern Nevada. Its typical habitat is short grass meadows near the edge of melting snow.
Ranunculus adoneus was first formally described in 1863 by Asa Gray in a list of species collected by several colleagues during the summer and autumn of 1862 on and near the Rocky Mountains in Colorado.[3][4]
Ranunculus adoneus is a native species that is found only in the Rocky Mountains around the limit of snow where it is quite common.[5] It is a long-lived perennial that is found at elevated meadows in alpine environments. The plants emerge at the edge of the melting snow and flower within a few days. The flowering time of R. adoneus is controlled by the time of snowmelt, so that on a steep gradient flowers appear first on a lower altitude and subsequently, with melting of the snow, several tens of meters higher. They are found at an altitude of 2500 – 4000 meters. Flowering lasts longer at lower altitudes.[6][7][8] The flowers persist for approximately 10 days. Secondary flowers may open a week or two after the primary flowers.[8]
The leaves of R. adoneus are about 4 cm in diameter and deeply dissected into linear lobes, with narrow leaf segments that grow at the base and along the stem and are often just one pair. The stem, which is about 9–25 cm long, is hairless and quite thick and ascends erect from the roots (caudices). It bears 1 to 3 flowers that are yellow with 5 to 10 wedge-shaped petals.[9] The flowers are larger than the leaves, about 4 cm and are situated low in the young plant but become higher through stem elongation in the summer. The flowers are protogynous: the pistils mature before the maturation of the anthers to prevent self-fertility.
The flower has 5 greenish-yellow sepals that have white hairs on the lower surface. Petals are overlapping and curved-up towards the tip so the flower is cup-shaped.
Receptacles bear 50–150 stigmas, which mature over several days. Photosynthetic achenes, the fruit that contains a seed, develop from the fertilized ovules. Seeds disperse mainly by gravity 3 to 5 weeks after fertilization.[8]
The flowers present heliotropism, a property that is often present in alpine and arctic plants. It allows the flowers to track the sun, warm up and attract insects[10] In fact, when the flowers are not within 45° in line with the sun, and less insects visit the flower, the seed yield is much less.[11]
Data related to Ranunculus adoneus at Wikispecies
Ranunculus adoneus, the alpine buttercup or snow buttercup, is a species of flowering plant. It is an alpine buttercup from the family Ranunculaceae. This species is mainly found in the Rocky Mountains in Colorado and Wyoming but can also be found in Idaho, northern Utah and eastern Nevada. Its typical habitat is short grass meadows near the edge of melting snow.
Ranunculus adoneus es una de las especies del género Ranunculus comunes de las regiones altas de los Alpes de Europa
Es una planta arbustiva perenne que alcanza 6-10 dm de altura; trepadora, crece apoyándose en soportes vegetales. En primavera se torna rojiza. Y no siempre son verdes, perdiendo las hojas por algunos meses al año.
Raíz fina que anualmente emite varios tallos erectos y redondos. Hojas basales persistentes, láminas circulares a reniformes, 2-3×-disectadas en segmentos lineales, 0,9-2,5 × 1,1-2,8 cm, base obtusa, márgenes enteros, ápices de segmentos angostos y aguzados. Flores amarillas, con pedicelos glabros; receptáculo glabro; sépalos 4-11 × 3-7 mm, abaxialmente poco pilosos, pelos incoloros; pétalos 5-10, 8-15 × 8-19 mm; nectario escamoso glabro. Cabeza de aquenios ovoides, 6-12 × 5-9 mm; aquenios 1,8-2,4 × 1-1,4 mm, glabros o casi; pico subulado, recto, 1,2-1,7 mm. Tiene un número de cromosoma 2 n = 16.
Presenta heliotropismo.
Ranunculus adoneus fue descrita por Asa Gray y publicado en Proceedings of the Academy of Natural Sciences of Philadelphia 15(3): 56–57. 1863[1864].[1]
Ver: Ranunculus
adoneus: epíteto
Ranunculus adoneus es una de las especies del género Ranunculus comunes de las regiones altas de los Alpes de Europa
Ranunculus adoneus A. Gray – gatunek rośliny z rodziny jaskrowatych (Ranunculaceae Juss.). Występuje naturalnie w Stanach Zjednoczonych, w stanach Kolorado, Utah, w północno-wschodniej części Nevady, w Idaho, Wyoming oraz w południowo-zachodniej części Montany[3][4].
Rośnie na łąkach w strefie alpejskiej. Występuje na wysokości od 2500 do 4000 m n.p.m. Kwitnie od maja do września[5].
Ranunculus adoneus A. Gray – gatunek rośliny z rodziny jaskrowatych (Ranunculaceae Juss.). Występuje naturalnie w Stanach Zjednoczonych, w stanach Kolorado, Utah, w północno-wschodniej części Nevady, w Idaho, Wyoming oraz w południowo-zachodniej części Montany.
Ranunculus adoneus là một loài thực vật có hoa trong họ Mao lương. Loài này được A. Gray miêu tả khoa học đầu tiên năm 1863.[1]
Bài viết về chủ đề tông mao lương Ranunculeae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Ranunculus adoneus là một loài thực vật có hoa trong họ Mao lương. Loài này được A. Gray miêu tả khoa học đầu tiên năm 1863.
