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Alnus serrulata is a large shrub or small tree that may grow up to 2.5–4 m (8.2–13.1 ft) high and 15 cm (5.9 in) in diameter. The scientific name originates from alnus which is an old name for alder; serrulata points to the finely-toothed leaf margins which it possesses. It takes about 10 yrs to mature.
Rhamnus alnifolia is a spreading shrub usually 0.5 to 1.5 metres (20 to 59 inches) tall, [5] rarely to 2 m (6 + 1 ⁄ 2 ft), its thin branches bearing deciduous leaves. [6] The thin, deeply veined leaves have oval blades 4.5 to 11 centimetres (1 + 3 ⁄ 4 to 4 + 3 ⁄ 8 in) long, pointed at the tip and lightly toothed along the edges. [5]
Foliage and inflorescence, subsp. crispa It is a large shrub or small tree3–12 metres (10– 39 + 1 ⁄ 2 ft) tall with smooth grey bark even in old age. The leaves are shiny green with light green undersurfaces, ovoid, 3–8 centimetres (1 + 1 ⁄ 4 – 3 + 1 ⁄ 4 in) long and 2–6 cm broad.
Betulaceae flowers are monoecious, meaning that they have both male and female flowers on the same tree. Their flowers present as catkins and are small and inconspicuous, often with reduced perianth parts. These flowers have large feathery stamen and produce a high volume of pollen, as they rely on wind pollination.
Female alder catkins after shedding their seeds Alnus serrulata male catkins. Alders are trees of the genus Alnus in the birch family Betulaceae.The genus includes about 35 species [2] of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes.
Hutchinson's system was one of the most influential revisions of taxonomy in the early twentieth century. Hutchinson is known for his 24 dicta on the classification of flowering plants. A key feature of his third edition in 1973 was based on the habit of the plant, namely that herbaceous plants or Herbaceae are phylogenetically more recent than ...
common alder; hazel alder; tag alder; smooth alder Betulaceae (birch family) Alnus sinuata: Sitka alder Betulaceae (birch family) Alnus subcordata: Caucasian alder Betulaceae (birch family) Alnus tenuifolia: mountain alder; thin-leaf alder Betulaceae (birch family) Betula: birches; Betula × caerulea: blue birch; blueleaf birch Betulaceae ...
Alder buckthorn has limited decorative qualities without conspicuous flowers or bold foliage, and is mainly grown for its conservation value, particularly to attract Brimstone butterflies. A variegated cultivar Frangula alnus 'Variegata' and a cultivar with very slender leaves 'Asplenifolia' are sometimes grown in gardens as ornamental shrubs ...