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53c. Sorbus Linnaeus subg. Sorbus
Shrubs or trees, to 150 dm. Winter buds glutinous or not. Leaves pinnately compound at least proximally; petiole nodes 5-lacunate; leaflet margins usually serrate, rarely almost entire. Flowers: styles distinct. Pomes: epidermis single-layered; flesh without tanniferous cells; core absent.
Species 72 (8 in the flora): North America, Eurasia, n Africa, Atlantic Islands; introduced in Pacific Islands (New Zealand).
Four of the 11 recognized sections of subg. Sorbus occur in the flora area.
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| 1 |
Leaflets minutely, densely papillose abaxially (at 70× ); carpels in fruit distinct in distal 1/2, apices convex; winter buds densely hairy, hairs usually whitish, rarely rufous, not glutinous. |
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53c.1 Sorbus sect. Sorbus |
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Leaflets not papillose abaxially; carpels in fruit connate or distinct, apices flat or convex; winter buds glabrous, glutinous, or hairy, hairs usually rufous, sometimes whitish |
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(2) |
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| 2 (1) |
Winter buds mostly glutinous; carpel apices flat or convex. |
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53c.2 Sorbus sect. Commixtae |
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Winter buds never strongly glutinous; carpel apices convex |
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(3) |
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| 3 (2) |
Leaflets not glaucous adaxially; flowers: perianth and androecium epigynous; carpels connate entire lengths; pomes red, not glaucous. |
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53c.3 Sorbus sect. Sambucifoliae |
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Leaflets somewhat glaucous adaxially; flowers: perianth and androecium semiepigynous; carpels distinct most of lengths; pomes pinkish red, glaucous. |
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53c.4 Sorbus sect. Tianshanicae |
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List of lower taxa
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