Genus Sorbus L.
Род 412 (19). ОФИКА, СКОРУША, МУКИНА — SORBUS L.¹
L., Sp. Pl. ed. 1 (1753) 477; Gen. Pl. ed. 5 (1754) 213.Fam: Rosaceae Juss.
Genus: Sorbus L.
English Name: White beam, Rowan, Service tree and Mountain-ashDescription:
Deciduous, rarely with overwintering leaves of not prickly trees and shrubs. Leaves simple, entire, divided, feathery-like dissected or complex, feathery-like, glabrous below, with sparse hairs or felted, with or without glands, while in the buds pleated. Bracts of different shape and size. Flowers small, collected in terminal umbellate thyroid panicles. Sepals 5, triangular. Petals 5, rounded or ovoid, with or without claws, white, yellowish white or rarely pink. Stamens 15 - 25, yellow. Carpels 2 - 5, partly free, partly fused with the dorsal side with hypantia and from the base to the middle with each other. The ovary lower, 2 - 5- nested with 2 seed buds in each nest. The styles are free or fused together at the bottom. The stigmas flat, smooth, not wider than the styles. Fruits false, globose, pear-shaped, ellipsoidal, spherical or broadly ovoid, fleshy, red, yellow, orange or brown, with hard leathery or membranous walls of the nests. Seeds oblong, trifoliate, pointed at both ends, reddish-brown.
Of this genus, S. aff. aria Crantz, leaf prints (Kurilo - Sofia, Pliocene and Lozenets - Sofia, Plio-Pleistocene).
Table for determination of the species 1 Leaves complex, unpaired ............................................. ......................................................................................................... 2
1* Leaves simple, undivided or feathery-like dissected .................................................................................................................. 3
2 Leaves with 7 - 9 pairs of leaflets. The buds are bare, sticky. The bark is cracked and scattered. The styles 5. Ripe fruits (20)
25 - 30 (40) mm in diameter, pear-shaped or spherical, yellow-green or red-brown .......................................... 2. - S domestica L.
2 * Leaves with 5 - 7 pairs of leaflets. The buds are felted and non-sticky. The bark is smooth. The styles 3 - 4. Ripe fruits up to 15
mm in diameter, spherically globular, ovoid, rarely ellipsoidal, bright red or orange-red ...................................... 1. - S. aucuparia L.
3 Fully developed green leaves below ........................................................................................................................................ 4
3* Fully developed leaves below white or gray hairy (felted) ......................................................................................................... 5
4 Leaves clearly divided, incised, sometimes feathery-like divided at the base, 16 - 18 cm long, with sharp finely serrated shares.
The buds are bare. The fruits are brown. Trees ............. ................................................................... 3. - S. torminalis (L.) Crantz
4* The leaves are not divided, 3 - 6 cm long. Buds with ciliated scales. The fruits are scarlet. Shrubs ............................................... …………………………………………………............................................................……....... 4. - S. chameepes (L.) Crantz
5 Leaves undivided or shallowly divided ………………………….....................................................………………………… 6
5* Leaves clearly endowed …………………………………………...................................................………………………… 7
6 Leaves broadly elliptic, oblong-elliptic, rounded ovate or semicircular, broader at the base, simple or double-toothed, opaque
above, whitish below. Fruits longer than wide ….....................................……………………………….... 5. - S. aria (L.) Crantz
6* Leaves broadly back ovoid to almost rounded, basically wedge-shaped, wider at the top, with spaced, symmetrically arranged
teeth, glossy above, flattened below. Fruits not longer than wide ………………………………… 6. - S. graeca (Spach) Kotschy
7 Leaves below white fibrous felted. Lateral veins less than 7 pairs ……............………………. 8. - S. umbellata (Desf.) Fritsch
7* Leaves below yellowish or gray fibrous felted. Lateral veins more than 7 pairs …….........……… 7. - S. austriaca (Beck) Hedl.
¹ Developed by St. Valev.From: „Флора на Н. Р. България”, том V, БАН, София, (1973)
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Sorbus is a genus of about 100–200 species of trees and shrubs in the rose family, Rosaceae. Species of Sorbus (s.l.) are commonly known as whitebeam, rowan, service tree, and mountain-ash. The exact number of species is disputed depending on the circumscription of the genus, and also due to the number of apomictic microspecies, which some treat as distinct species, but others group in a smaller number of variable species. Recent treatments [1][2][3][4] treat Sorbus in a narrower sense to include only the pinnate leaved species of subgenus Sorbus, raising several of the other subgenera to generic rank.
Sorbus is not closely related to the true ash trees which belong to the genus Fraxinus, although the leaves are superficially similar.
Rowan in the garden of Eastern Siberia
As treated in its broad sense, the genus is divided into two main and three or four small subgenera (with more recent generic assignments in parentheses):
Sorbus subgenus Sorbus (genus Sorbus s.s.), commonly known as the rowan (primarily in the UK) or mountain-ash (in Ireland, North America and the UK), with compound leaves usually hairless or thinly hairy below; fruit carpels not fused; the type is Sorbus aucuparia (European rowan). Distribution: cool-temperate Northern Hemisphere. (Genus Sorbus s.s.)
From Wikipedia, the free encyclopedia
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Distribution in Bulgaria: (Conspectus of the Bulgarian Vascular Flora) = conspectus&gs_l= Zlc.
Distribution:
References: „Флора на Н. Р. България”, том V, БАН, София, (1973), Wikipedia, the free encyclopedia
SPECIES:
Sorbus aucuparia L. - Rowan, Mountain-ash
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