Viburnum rhytidophyllum

Runzelblättriger (Viburnum rhytidophyllum )

The Runzelblättrige (Viburnum rhytidophyllum ), a wizened Snowball, Runzelblatt Snowball, Evergreen snowball, tongue snowball, Evergreen Chinese snowball, Evergreen Großblatt Snowball or Evergreen tongue snowball called, a species belonging to the genus viburnum ( Viburnum ) is within the Family Moschuskraut plants ( Adoxaceae ) belongs. Their home is in China. It is used as an ornamental tree in parks and gardens.

• 4.1 Notes and references

Description

Appearance and leaf

Viburnum rhytidophyllum grows as evergreen shrub or small tree that reaches the stature heights of up to 4 meters. The bark is gray - brown. The branches have a bark that in the first year densely woolly with yellow- whitish, yellow -brown or red -brown stellate hairs ( trichomes ) is covered later she is bald and has scattered small rounded lenticels. The winter buds are covered with woolly yellow- or red- brownish bräunlichenen stellate hairs.

The ever against constantly arranged on the branches leaves are divided into petiole and leaf blade. The robust, green, usually 1.5 to 3 (up to 4 ) cm long petiole is dense woolly covered with yellow- whitish, yellow -brown or red -brown stellate hairs. The simple, leathery leaf blade is at a length of usually 8 to 18 (up to 25 ) cm and a width of (1.5 to ) usually 2.5 to 8 cm ovate - oblong to ovate - lanceolate, rarely lanceolate with rounded to slightly sweetheart Spreitenbasis and easily pointed to blunt upper end. The leaf margin is serrated smooth or indistinct. The leaf surfaces are initially yellow- whitish, yellow- brown or red- brown and the leaf surface is intensely green. The lower leaf surface is strongly rugose and distinctly reticulate. The glossy upper leaf surface is initially sparsely covered with fluffy star hair and verkahlt. The median nerve and the lateral nerves are raised on the underside of leaves. It is Fiedernervatur ago with six to eight, rarely up to twelve lateral nerves. There are no stipules present.

Inflorescence and flower

The flowering period begins after the formation of new leaves and extends from April to May The strong inflorescence stem has a length of usually 1.5 to 4 ( to 7) inches. The terminal, umbel- like, branched, zymöse inflorescence has a diameter of 7 to 12 cm and contains many flowers. The primary branching of the inflorescence usually has seven rays, which are densely covered with woolly yellow- whitish, yellow -brown or red -brown stellate hairs. The deciduous bracts are leaf-like foliage, green, linear to linear- lanceolate and fluffy covered with stellate hairs. The bracts are linear. The almost sessile to short -stalked flowers are located on the third-order beams.

The relatively small, hermaphroditic flowers are radial symmetry and fünfzählig double perianth. The five green, 2-3 mm long sepals are fused tubular and bell-shaped and covered with woolly yellow- whitish stellate hairs. The five calyx teeth are at a length of only 0.5 to 1 mm triangular- ovate with blunt upper end which is ciliated something, and have only sparse fluffy star hair. The five petals are almost bare fused to a 3 to 4 mm long corolla tube. The five at a length of 2 to 3 mm circular - ovate Corolla lobe with rounded tip and smooth edge are expanded to a crown with a diameter of 5 to 7 mm. The color of the petals is predominantly white, but in knospigen state and outside they are pink. It's just a circle with five fertile stamens present; they project beyond the corolla tube. The corolla tube inserted close to the base of the filaments have a length of about 6 mm. The yellow dust bags are broadly elliptic with a length of about 1 mm. The style dominated as the calyx teeth, ending in a capitate stigma.

Fruit and seeds

The fruits ripen from September to October and will initially be red until maturity they turn black. The single-seeded drupe is broadly elliptical with a rounded base and peak at a length of 6 to 8 mm; it is bare or sparsely covered with stellate hairs fluffy. The at a length of 6 to 7 mm and a width of 4 to 5 mm wide elliptical seeds have two on the back and abdomen three furrows, and a rounded upper end.

Chromosome number

The chromosome number is 2n = 18

Occurrence

Viburnum rhytidophyllum grows naturally in forests and thickets at altitudes 700-2400 m only in the Chinese provinces of Guizhou, western Hubei, southern Shaanxi and Sichuan.

System

The first description of Viburnum rhytidophyllum in 1888 by William Botting Hemsley in Francis Blackwell Forbes & William Botting Hemsley: Journal of the Linnean Society, Botany, Volume 23 (156 ), pp. 355 A synonym for Viburnum rhytidophyllum Hemsl. (sometimes Viburnum rhytidophyllum Hemsl. ex Forb. Hemsl et. ) is Callicarpa vastifolia Diels ..

There are two forms of type Viburnum rhytidophyllum known:

• Viburnum rhytidophyllum format aureovariegatum Boom
• Viburnum rhytidophyllum forma roseum Rehder

Swell

• Qiner Yang & Valéry Malécot: Viburnum. In: Flora of China Editorial Committee: Wu Zheng -yi, Peter H. Raven & Deyuan Hong (eds.): Flora of China. Cucurbitaceae through Valerianaceae, with Annonaceae and Berberidaceae. Volume 19, Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 28 February, 2011, ISBN 978-1-935641-04-9, pp. 579 ( online text is identical to the printed work, Viburnum rhytidophyllum - online). (Section Description, distribution and systematics)