| 1 |
Sepals lilac-blue or pale blue, or white with blue veins, persistent |
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16 T. lilacinus |
| + |
Sepals yellow, usually caducous, or rarely white inside and purplish outside, persistent. |
|
(2) |
| |
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|
| 2 (1) |
Leaves palmately parted. |
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(3) |
| + |
Leaves palmately sect. |
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(7) |
| |
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| 3 (2) |
Leaves all basal, or 1--3 inserted near base of stem. |
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(4) |
| + |
Leaves both basal and cauline, cauline leaves 2--4, inserted at middle or above on stem. |
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(5) |
| |
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| 4 (3) |
Leaf blade 3-parted, lobes indistinct, margin with teeth ovate or broadly ovate |
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4 T. pumilus |
| + |
Leaf blade deeply 3-sect nearly to base, segments lobed, margin with teeth triangular or narrowly triangular |
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5 T. farreri |
| |
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| 5 (3) |
Sepals 8--13 |
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3 T. dschungaricus |
| + |
Sepals 5. |
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(6) |
| |
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| 6 (5) |
Sepals ± green when dried; petals broadly spatulate at apex; persistent style erect |
|
1 T. yunnanensis |
| + |
Sepals not green when dried; petals narrowed at apex; persistent style turning outside |
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2 T. buddae |
| |
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| 7 (2) |
Petals longer than stamens, caducous. |
|
(8) |
| + |
Petals shorter than or subequaling stamens, usually persistent. |
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(11) |
| |
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|
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| 8 (7) |
Petals shorter than sepals. |
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(9) |
| + |
Petals equaling or longer than sepals. |
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(10) |
| |
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|
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| 9 (8) |
Petals narrowly linear, 1--1.5(--1.8) mm wide, slightly spatulate |
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12 T. ledebourii |
| + |
Petals spatulate-linear, broadened from base, broadest above middle, 2--3.5 mm wide |
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13 T. asiaticus |
| |
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|
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| 10 (8) |
Sepals (6--)10--15(--19); petals subequaling sepals; persistent style ca. 1 mm |
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14 T. chinensis |
| + |
Sepals 5--7; petals usually longer than sepals; persistent style 3.5--4 mm |
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15 T. macropetalus |
| |
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| 11 (7) |
Petals longer than filaments, subequaling stamens; flower solitary and terminal, or 2 or 3 flowers in a cyme. |
|
(12) |
| + |
Petals equaling filaments; flower solitary, terminal. |
|
(13) |
| |
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|
|
| 12 (11) |
Sepals 5--7; styles purplish |
|
10 T. japonicus |
| + |
Sepals 15--18; styles dark purple or black |
|
11 T. altaicus |
| |
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|
|
| 13 (11) |
Sepals ca. 6 mm, persistent |
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6 T. micranthus |
| + |
Sepals 10--20 mm, caducous or persistent. |
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(14) |
| |
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|
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| 14 (13) |
Segments of leaves not separate; sepals ± green when dried |
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7 T. ranunculoides |
| + |
Segments of leaves separate; sepals not green when dried. |
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(15) |
| |
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|
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| 15 (14) |
Basal leaves 4--6.5 cm wide; sepals not purplish outside, caducous |
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9 T. taihasenzanensis |
| + |
Basal leaves 1--2.6(--4.5) cm wide; sepals purplish outside, usually persistent. |
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(16) |
| |
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| 16 (15) |
Central segment 3-lobed to ± middle; carpels 6--9(--25) |
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5 T. farreri |
| + |
Central segment 3-parted nearly to base; carpels 4--6 |
|
8 T. vaginatus |
