| 1 |
Flowers in terminal capitate heads |
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(2) |
| + |
Flowers in axillary pairs |
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(4) |
| |
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| 2 (1) |
Rants erect |
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18 Lonicera sp. |
| + |
Rants climbing or scandent |
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(3) |
| |
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| 3 (2) |
Flowers orange-red. Upper leaves perfoliate or united at the base. Cultivated |
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20 Lonicera sempervirens |
| + |
Flowers pink-purple. Upper leaves not united at the base. Wild |
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17 Lonicera griffithii |
| |
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| 4 (1) |
Evergreen climbing or twining shrubs. Cultivated |
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19 Lonicera japonica |
| + |
Deciduous erect or prostrate shrubs. Wild |
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(5) |
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| 5 (4) |
Bracts large, ovate or boat-shaped, bracteoles absent |
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(6) |
| + |
Bracts linear or narrow oblong, bracteoles connate or distinct |
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(9) |
| |
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| 6 (5) |
Bracts boat-shaped, obovate-elliptic, peduncles (1-) 1.5 cm long |
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(7) |
| + |
Bracts flat, ovate, peduncle less than 1 cm long |
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(8) |
| |
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| 7 (6) |
Leaves and bracts glabrous with ciliate margin |
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4 Lonicera vaccinioides |
| + |
Leaves and bracts hirsute and glandular hairy all over the surface |
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3 Lonicera hispida |
| |
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| 8 (6) |
Plant glabrous to subglabrous, except leaf margin |
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2 Lonicera semenovii |
| + |
Pant more or less hispid all over the surface |
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1 Lonicera asperifolia |
| |
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| 9 (5) |
Corolla distinctly 2-lipped |
|
(13) |
| + |
Corolla not 2-lipped, limb unequally 5-lobed |
|
(10) |
| |
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| 10 (9) |
Rigid, more or less prostrate or dwarf shrubs. Leaves less than 2 cm long |
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(11) |
| + |
Erect shrubs. Leaves more than 2 cm long |
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(12) |
| |
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| 11 (10) |
Calyx limb minute, undulate. Corolla distinctly gibbous at the base |
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9 Lonicera obovata |
| + |
Calyx teeth triangular to linear, conspicuous. Corolla not gibbous at the base |
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10 Lonicera myrtillus |
| |
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| 12 (10) |
Corolla yellow. Berries blue, on short peduncle up to 10 mm long |
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12 Lonicera stenantha |
| + |
Corolla purple. Berries red-black, on long peduncle up to 20 mm long |
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11 Lonicera purpurascens |
| |
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| 13 (9) |
Branches hollow |
|
(14) |
| + |
Branches solid |
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(16) |
| |
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| 14 (13) |
Peduncle longer than petiole. Borries red |
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8 Lonicera korolkovii |
| + |
Peduncle shorter than petiole. Berries white-translucent |
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(15) |
| |
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| 15 (14) |
Bracteoles free, glandular hairy. Corolla white, diffused with pink or purple |
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7 Lonicera nummularifolia |
| + |
Bracteoles connate in pairs, not glandular. Corolla white, fading to yellow |
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6 Lonicera quinquelocularis |
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| 16 (13) |
Leaves densely pubescent, glandular on both surfaces. Bracteoles connate, cup-shaped |
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5 Lonicera hypoleuca |
| + |
Leaves slightly pilose on the nerves. Bracteoles free, minute or obsolete |
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(17) |
| |
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| 17 (16) |
Berries connate, bracteoles minute or absent |
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(18) |
| + |
Berries free, bracteoles small, glandular hairy |
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(19) |
| |
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| 18 (17) |
Calyx lobes obsolete, margin undulate. Berries red |
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15 Lonicera microphylla |
| + |
Calyx teeth linear-lanceolate. Berries black |
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13 Lonicera caucasica subsp. govaniana |
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| 19 (17) |
Leaves more than 8 cm long. Corolla ± 12 mm long, densely hairy |
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14 Lonicera webbiana |
| + |
Leaves less than 4 cm long. Corolla ± 7 mm long, sparsely pubescent |
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16 Lonicera heterophylla |
