| 1 |
Basal leaves 3-lobed. |
|
(2) |
| + |
Basal leaves 3-partite, 3-sect, or ternate. |
|
(24) |
| |
|
|
|
| 2 (1) |
Petals abaxially puberulent |
|
63 R. hamiensis |
| + |
Petals glabrous. |
|
(3) |
| |
|
|
|
| 3 (2) |
Petal nectary pit with a scale |
|
75 R. xinningensis |
| + |
Petal nectary pit without scale. |
|
(4) |
| |
|
|
|
| 4 (3) |
Carpels and achenes puberulent. |
|
(5) |
| + |
Carpels and achenes glabrous. |
|
(9) |
| |
|
|
|
| 5 (4) |
Fibrous roots subequally thick. |
|
(6) |
| + |
Fibrous roots thickened at base. |
|
(7) |
| |
|
|
|
| 6 (5) |
Basal leaves 1(--3), blade thinly papery, reniform, rarely orbicular-ovate, 2--5 cm wide, base usually cordate; stem leaves 3--7-sect; style shorter than ovary |
|
59 R. monophyllus |
| + |
Basal leaves ca. 4, blade leathery, suborbicular or orbicular-ovate, 0.8--1.4 cm wide, base subcordate; stem leaves 3-lobed or 3-sect; styles 2 × as long as ovary |
|
73 R. pseudolobatus |
| |
|
|
|
| 7 (5) |
Blade of basal leaves flabellate or flabellate-ovate, base subtruncate to cuneate |
|
64 R. felixii |
| + |
Blade of basal leaves pentagonal or reniform, base cordate. |
|
(8) |
| |
|
|
|
| 8 (7) |
Stem leaves 3-sect; style 0.6--1 mm |
|
71 R. dielsianus |
| + |
Stem leaves 3-lobed; style ca. 0.4 mm |
|
72 R. limprichtii |
| |
|
|
|
| 9 (4) |
Leaves glabrous. |
|
(10) |
| + |
Leaves puberulent. |
|
(17) |
| |
|
|
|
| 10 (9) |
Plants aquatic; petals 2.5--4.2 mm; style up to 0.1 mm. |
|
(11) |
| + |
Plants of alpine meadows or grassy slopes; petals 5.5--13 mm; style 0.5--0.7 mm. |
|
(12) |
| |
|
|
|
| 11 (10) |
Stems 10--40 cm, glabrous; receptacle puberulent; aggregate fruit 5--6 mm in diam. |
|
84 R. natans |
| + |
Stems 3--5 cm, subglabrous or sparsely puberulent; receptacle glabrous; aggregate fruit 3--4 mm in diam. |
|
85 R. intramongolicus |
| |
|
|
|
| 12 (10) |
Blade of basal leaves up to 3--3.5 cm wide, lateral lobes with 3--6 rounded teeth; petals 9--17 mm wide. |
|
(13) |
| + |
Blade of basal leaves up to 1.4 cm wide, lateral lobes entire; petals 2.5--8.5 mm wide. |
|
(14) |
| |
|
|
|
| 13 (12) |
Sepals abaxially yellowish puberulent |
|
60 R. albertii |
| + |
Sepals abaxially black-brown puberulent |
|
61 R. transiliensis |
| |
|
|
|
| 14 (12) |
Petal apex emarginate |
|
54 R. yechengensis |
| + |
Petal apex rounded. |
|
(15) |
| |
|
|
|
| 15 (14) |
Stem leaves undivided, lanceolate, 3-sect sometimes only in R. nephelogenes var. geniculatus |
|
56 R. nephelogenes |
| + |
Stem leaves 3-partite or 3-sect. |
|
(16) |
| |
|
|
|
| 16 (15) |
Blades of basal leaves trapeziform-ovate, 0.8--2 cm wide, base subtruncate or truncate-cordate, |
|
43 R. popovii |
| + |
Blades of basal leaves ovate or narrowly obovate, 0.5--0.9 cm wide, base broadly cuneate or rounded |
|
51 R. pulchellus |
| |
|
|
|
| 17 (9) |
Basal leaf blade bases cuneate. |
|
(18) |
| + |
Basal leaf blade bases cordate, rounded, or broadly cuneate. |
|
(19) |
| |
|
|
|
| 18 (17) |
Basal leaf blade broadly cuneate or obovate, up to 1.5 cm; flowers solitary |
|
48 R. yaoanus |
| + |
Basal leaf blade narrowly oblong or lanceolate-linear, 2--6 cm; flowers solitary or 2 or 3 in a terminal monochasium |
|
57 R. membranaceus |
| |
|
|
|
| 19 (17) |
Basal leaf blade bases cordate. |
|
(20) |
| + |
Basal leaf blade bases rounded or broadly cuneate. |
|
(21) |
| |
|
|
|
| 20 (19) |
Stems 19--24 cm; basal leaves 1.6--2.4 cm wide, adaxially sparsely puberulent, abaxially glabrous; receptacle puberulent; petals obovate, 5--6.5 × 4.5--7 mm |
|
68 R. menyuanensis |
| + |
Stems 5.5--8.5 cm; basal leaves 0.6--1 cm wide, adaxially glabrous, abaxially strigose; receptacle glabrous; petals flabellate or broadly obovate, 6--7.5 × 6--9.5 mm |
|
70 R. zhungdianensis |
| |
|
|
|
| 21 (19) |
Lateral lobe of basal leaf with up to 4 obliquely triangular locules |
|
44 R. pectinatilobus |
| + |
Lateral lobe of basal leaf undivided or 2-lobed. |
|
(22) |
| |
|
|
|
| 22 (21) |
Stems and leaves drying blackish; basal leaves densely appressed ciliate at margin |
|
53 R. densiciliatus |
| + |
Stems and leaves not drying blackish; basal leaves not ciliate or with sparse spreading hairs. |
|
(23) |
| |
|
|
|
| 23 (22) |
Lateral lobes of basal leaves unequally 2-lobed |
|
43 R. popovii |
| + |
Lateral lobes of basal leaves usually undivided |
|
69 R. dongrergensis |
| |
|
|
|
| 24 (1) |
Basal leaves ternate. |
|
(25) |
| + |
Basal leaves 3-partite or 3-sect. |
|
(38) |
| |
|
|
|
| 25 (24) |
Carpels and achenes puberulent. |
|
(26) |
| + |
Carpels and achenes glabrous. |
|
(29) |
| |
|
|
|
| 26 (25) |
Stems 20--30 cm; leaflets 2 or 3 × dissected, ultimate lobules subfiliform; flowers 2 or 3 in a monochasium |
|
50 R. nematolobus |
| + |
Stems 4.5--16 cm; leaflets with ultimate lobules ovate, narrowly ovate, or oblong; flowers solitary. |
|
(27) |
| |
|
|
|
| 27 (26) |
Receptacle puberulent; petals broadly obovate, 8--12 × 6--10 mm |
|
31 R. gelidus |
| + |
Receptacle glabrous; petals narrowly obovate or cuneate, 5.8--6.5 × 2.6--4 mm. |
|
(28) |
| |
|
|
|
| 28 (27) |
Basal leaves abaxially sericeous, central leaflet 3-lobed |
|
35 R. stenorhynchus |
| + |
Basal leaves adaxially glabrous, central leaflet 3-partite or 3-sect |
|
39 R. polii |
| |
|
|
|
| 29 (25) |
Stolons present, ca. 20 cm, strigose; flowers 2 in terminal monochasium |
|
40 R. yanshanensis |
| + |
Stolons absent; flowers solitary, terminal or leaf-opposed. |
|
(30) |
| |
|
|
|
| 30 (29) |
Sepals completely or partly dark purple. |
|
(31) |
| + |
Sepals greenish. |
|
(32) |
| |
|
|
|
| 31 (30) |
Sepals uniformly dark purple; longest petiole 6--8.5 cm; leaf blade glabrous |
|
32 R. rufosepalus |
| + |
Sepals with purple margins; longest petiole 2--5 cm; leaf blade sparsely pubescent |
|
33 R. adoxifolius |
| |
|
|
|
| 32 (30) |
Petals 3 or 4, cuneate or cuneate-obovate; leaflets 1 or 2 × dissected, ultimate lobules lanceolate-linear; |
|
49 R. jingyuanensis |
| + |
Petals 5; leaflets not as dissected, ultimate lobules ovate or narrowly ovate. |
|
(33) |
| |
|
|
|
| 33 (32) |
Stamens 5--14. |
|
(34) |
| + |
Stamens many. |
|
(35) |
| |
|
|
|
| 34 (33) |
Fibrous roots thick at base; stamens 7--14 |
|
34 R. mainlingensis |
| + |
Fibrous roots uniformly thick; stamens 5 |
|
48 R. yaoanus |
| |
|
|
|
| 35 (33) |
Petiole 8--15 cm; basal leaves ca. 2. |
|
(36) |
| + |
Petiole 2--6.5 cm; basal leaves 3--8. |
|
(37) |
| |
|
|
|
| 36 (35) |
Leaf blade appressed puberulent, terminal segment irregularly 3-fid; petals 7--12 × 6--10 mm, obovate-orbicular |
|
36 R. formosa-montanus |
| + |
Leaf blade glabrous or nearly so, terminal segment pinnatifid; petals 9--12 × 4--6 mm, narrowly obovate |
|
38 R. morii |
| |
|
|
|
| 37 (35) |
Stem very slender, trailing and rooting from upper nodes; basal leaves ca. 3 |
|
37 R. matsudae |
| + |
Stem erect, not rooting from upper nodes; basal leaves 4--8, |
|
39 R. polii |
| |
|
|
|
| 38 (24) |
Basal leaves 3-sect. |
|
(39) |
| + |
Basal leaves 3-partite. |
|
(66) |
| |
|
|
|
| 39 (38) |
Carpels and achenes puberulent. |
|
(40) |
| + |
Carpels and achenes glabrous. |
|
(45) |
| |
|
|
|
| 40 (39) |
Flowers in a monochasium. |
|
(41) |
| + |
Flowers solitary. |
|
(42) |
| |
|
|
|
| 41 (40) |
Blades of basal leaves up to 4 cm wide; central segment 3-lobed, lobes ovate |
|
25 R. hirtellus |
| + |
Blades of basal leaves up to 2(--3.4) cm; central segment usually 2 × dissected, ultimate lobules linear-lanceolate |
|
47 R. tanguticus |
| |
|
|
|
| 42 (40) |
Petals puberulent adaxially near nectary pit |
|
3 R. polyrhizos |
| + |
Petals glabrous. |
|
(43) |
| |
|
|
|
| 43 (42) |
Stems 20--26 cm, mostly glabrous, sparsely puberulent only near apex; basal leaf 1 |
|
59 R. monophyllus |
| + |
Stems 5--14 cm, puberulent; basal leaves 3--5. |
|
(44) |
| |
|
|
|
| 44 (43) |
Leaf hairs 0.8--1 mm; flower ca. 1 cm in diam. |
|
25 R. hirtellus |
| + |
Leaf hairs 0.3--0.6 mm; flower 1.7--2 cm in diam. |
|
31 R. gelidus |
| |
|
|
|
| 45 (39) |
Leaves all basal; scape 4.5--7 mm |
|
30 R. oreionannos |
| + |
Leaves basal and stem; stems taller. |
|
(46) |
| |
|
|
|
| 46 (45) |
Basal leaves leathery, glabrous, or only adaxially puberulent. |
|
(47) |
| + |
Basal leaves papery or herbaceous. |
|
(50) |
| |
|
|
|
| 47 (46) |
Petals flabellate-obovate or broadly obovate, 10--16 mm; central segment of basal leaf long elliptic or oblanceolate, undivided |
|
15 R. chuanchingensis |
| + |
Petals obovate or broadly obovate, up to 7--10 mm; central segment of basal leaf rhombic, obovate, or ovate, usually 3-lobed. |
|
(48) |
| |
|
|
|
| 48 (47) |
Lateral segments of basal leaf blade oblong, undivided |
|
26 R. banguoensis |
| + |
Lateral segments of basal leaf blade oblique flabellate, unequally 2-cleft. |
|
(49) |
| |
|
|
|
| 49 (48) |
Stems 3.5--15 cm; flowers solitary, or 2 in a monochasium; petals obovate, 5--10 × 4--12 mm |
|
16 R. glareosus |
| + |
Stems 1.5--3.7 cm; flowers solitary; petals broadly obovate, 5.5--7 × 4--6.5 mm |
|
28 R. glabricaulis |
| |
|
|
|
| 50 (46) |
Basal leaf blade segments linear, undivided. |
|
(51) |
| + |
Basal leaf blade segments not linear, usually divided. |
|
(52) |
| |
|
|
|
| 51 (50) |
Stems prostrate, rooting adventitiously near base, up to 27 cm; basal leaves glabrous, base cuneate, lateral segments spreading at an acute angle to central segment |
|
56 R. nephelogenes |
| + |
Stems erect, 5--6 cm; basal leaves adaxially glabrous, abaxially appressed puberulent, base subtruncate, lateral segments spreading at a right angle to central segment |
|
58 R. hejingensis |
| |
|
|
|
| 52 (50) |
Inflorescence a 2- or 3-flowered monochasium. |
|
(53) |
| + |
Inflorescence 1-flowered. |
|
(54) |
| |
|
|
|
| 53 (52) |
Basal leaf blade base broadly cuneate; flower 1--1.7 cm diam. |
|
41 R. potaninii |
| + |
Basal leaf blade base deeply cordate; flower ca. 2.5 cm diam. |
|
24 R. balikunensis |
| |
|
|
|
| 54 (52) |
Basal leaf blade base broadly cuneate |
|
41 R. potaninii |
| + |
Basal leaf blade base cordate or cordate-truncate. |
|
(55) |
| |
|
|
|
| 55 (54) |
Basal leaf blade base cordate-truncate |
|
45 R. brotherusii |
| + |
Basal leaf blade base cordate. |
|
(56) |
| |
|
|
|
| 56 (55) |
Stems prostrate, filiform, up to 20 cm |
|
19 R. pegaeus |
| + |
Stems erect. |
|
(57) |
| |
|
|
|
| 57 (56) |
Fibrous roots conspicuously thickened at base |
|
14 R. pseudopygmaeus |
| + |
Fibrous roots subequally thick, in R. hirtellus above slightly thickened. |
|
(58) |
| |
|
|
|
| 58 (57) |
Segments of basal leaf 1--3 × dissected, ultimate lobules lanceolate-linear |
|
47 R. tanguticus |
| + |
Segments of basal leaf not dissected, ultimate lobules ovate or narrowly ovate. |
|
(59) |
| |
|
|
|
| 59 (58) |
Sepals dark red |
|
23 R. rubrocalyx |
| + |
Sepals greenish. |
|
(60) |
| |
|
|
|
| 60 (59) |
Receptacle yellow puberulent; sepals persistent |
|
20 R. glacialiformis |
| + |
Receptacle glabrous, subglabrous or sparsely white puberulent only in R. songoricus; sepals deciduous. |
|
(61) |
| |
|
|
|
| 61 (60) |
Basal leaves 2--4.4 cm wide; receptacle subglabrous or sparsely puberulent; stamens ca. 70; stems 7--30 cm |
|
1 R. songoricus |
| + |
Basal leaves less than 2 cm wide; receptacle glabrous; stamens fewer than 35; stems usually less than 10 cm. |
|
(62) |
| |
|
|
|
| 62 (61) |
Petals oblong, 4--5.2 mm |
|
18 R. micronivalis |
| + |
Petals obovate. |
|
(63) |
| |
|
|
|
| 63 (62) |
Central segment of basal leaf undivided, obovate or obovate-oblong. |
|
(64) |
| + |
Central segment of basal leaf 3-lobed, rhombic-obovate |
|
(65) |
| |
|
|
|
| 64 (63) |
Stems puberulent; basal leaves appressed yellowish pubescent |
|
25 R. hirtellus |
| + |
Stems and basal leaves glabrous |
|
29 R. pedicellatus |
| |
|
|
|
| 65 (63) |
Stems 5--12(--20) cm; basal leaves 4--14(--22) mm wide; stem leaves 2; ovary as long as styles |
|
17 R. petrogeiton |
| + |
Stems 1--2.5 cm; basal leaves up to 4 mm wide; stem leaf 1; ovary 3 × longer than styles |
|
27 R. dingjieensis |
| |
|
|
|
| 66 (38) |
Petals hairy. |
|
(67) |
| + |
Petals glabrous. |
|
(68) |
| |
|
|
|
| 67 (66) |
Stems 5--18 cm; basal leaves 0.7--1.8 × 1--3.2 cm, base cordate, rarely subtruncate; petals obovate, adaxially puberulent near nectary pit, abaxially glabrous; achenes puberulent |
|
3 R. polyrhizos |
| + |
Stems 20--30 cm; basal leaves larger, 2.5--4 × 2--4 cm, base truncate; petals ovate, adaxially glabrous, abaxially puberulent; achenes glabrous |
|
63 R. hamiensis |
| |
|
|
|
| 68 (66) |
Carpels and achenes puberulent. |
|
(69) |
| + |
Carpels and achenes glabrous. |
|
(76) |
| |
|
|
|
| 69 (68) |
Fibrous roots thickened at base. |
|
(70) |
| + |
Fibrous roots subequally thick, not thickened at base. |
|
(71) |
| |
|
|
|
| 70 (69) |
Basal leaf blade base broadly cuneate |
|
64 R. felixii |
| + |
Basal leaf blade base cordate |
|
71 R. dielsianus |
| |
|
|
|
| 71 (69) |
Stems mostly glabrous, sparsely puberulent only below flower; receptacle glabrous. |
|
(72) |
| + |
Stems puberulent throughout; receptacle puberulent. |
|
(73) |
| |
|
|
|
| 72 (71) |
Basal leaves ca. 10, herbaceous |
|
6 R. franchetii |
| + |
Basal leaf 1, papery |
|
59 R. monophyllus |
| |
|
|
|
| 73 (71) |
Stems densely brownish puberulent; basal leaf blades abaxially puberulent, adaxially glabrous |
|
43 R. popovii |
| + |
Stems sparsely white puberulent; basal leaf blades glabrous on both surfaces. |
|
(74) |
| |
|
|
|
| 74 (73) |
Basal leaf blade base subtruncate |
|
13 R. nankotaizanus |
| + |
Basal leaf blade base cordate. |
|
(75) |
| |
|
|
|
| 75 (74) |
Stems (10--)15--25 cm; basal leaf blade with lateral segments pectinately 4- or 5-cleft, white puberulent; flowers 1.4--1.9 cm in diam. |
|
4 R. pedatifidus |
| + |
Stems 7--14 cm; basal leaf blade with lateral segments unequally 2 or 3-lobed, yellowish strigose; flowers 0.9--1.1 cm in diam. |
|
25 R. hirtellus |
| |
|
|
|
| 76 (68) |
Fibrous roots thickened at base. |
|
(77) |
| + |
Fibrous roots subequally thick, not thickened at base. |
|
(78) |
| |
|
|
|
| 77 (76) |
Stems 0.8--5 cm; basal leaf blade 3--8 mm wide, adaxially glabrous or sparsely puberulent, abaxially glabrous; receptacle glabrous |
|
14 R. pseudopygmaeus |
| + |
Stems ca. 40 cm; basal leaf blade 12--20 mm wide, adaxially glabrous, abaxially puberulent; receptacle puberulent |
|
71 R. dielsianus |
| |
|
|
|
| 78 (76) |
Basal leaf blades with base truncate, rounded, broadly cuneate, or cuneate (R. chuanchingensis, R. trautvetterianus, and R. brotherusii) sometimes cordate-truncate. |
|
(79) |
| + |
Basal leaf blade base cordate. |
|
(92) |
| |
|
|
|
| 79 (78) |
Plants aquatic |
|
82 R. radicans |
| + |
Plants of alpine meadows or on slopes. |
|
(80) |
| |
|
|
|
| 80 (79) |
Receptacle puberulent. |
|
(81) |
| + |
Receptacle glabrous. |
|
(84) |
| |
|
|
|
| 81 (80) |
Lateral lobes of basal leaves pectinately 4- or 5-cleft, lobules sublinear |
|
5 R. rigescens |
| + |
Lateral lobes not pectinate-cleft. |
|
(82) |
| |
|
|
|
| 82 (81) |
Basal leaf blades up to 4 cm wide, base truncate-cuneate or cordate-truncate; central lobe obovate or cuneate, 3-lobed |
|
2 R. trautvetterianus |
| + |
Basal leaf blades up to 1.4--3.3 cm wide, base broadly cuneate or rounded; central lobe linear or oblong-oblanceolate, usually undivided. |
|
(83) |
| |
|
|
|
| 83 (82) |
Basal leaf blades broadly cuneate at base; central lobe linear or oblong, undivided or 1- or 2-lobulate, lateral lobes oblique lanceolate, undivided, or oblique cuneate, 2- or 3-lobulate |
|
46 R. furcatifidus |
| + |
Basal leaf blades rounded at base; central lobe oblong, undivided, lateral lobes ovate, undivided |
|
69 R. dongrergensis |
| |
|
|
|
| 84 (80) |
Petals 6--8, broadly oblong-oblanceolate or narrowly obovate, 6--8 |
|
21 R. luoergaiensis |
| + |
Petals usually 5, obovate or elliptic (in R. junipericola sometimes oblong, then petals 5). |
|
(85) |
| |
|
|
|
| 85 (84) |
Leaf blades abaxially densely pubescent |
|
57 R. membranaceus |
| + |
Leaf blades abaxially glabrous or sparsely puberulent. |
|
(86) |
| |
|
|
|
| 86 (85) |
Petals broadly obovate or flabellate-obovate |
|
15 R. chuanchingensis |
| + |
Petals obovate, narrowly obovate, or oblong. |
|
(87) |
| |
|
|
|
| 87 (86) |
Basal leaf blades leathery, base rounded, all lobes undivided, entire |
|
26 R. banguoensis |
| + |
Basal leaf blades papery or herbaceous, all or at least lateral lobes divided. |
|
(88) |
| |
|
|
|
| 88 (87) |
Basal leaf blades 2.1--4.5 cm wide. |
|
(89) |
| + |
Basal leaf blades up to 2.2--2.8 cm wide. |
|
(90) |
| |
|
|
|
| 89 (88) |
Basal leaf blade subpentagonal or rhombic-ovate, base broadly cuneate, lateral lobes unequally 3-partite |
|
41 R. potaninii |
| + |
Basal leaf blade rhombic or cuneate, base cuneate, lateral lobes unequally 2-lobed or undivided |
|
42 R. cangshanicus |
| |
|
|
|
| 90 (88) |
Basal leaf blade with central lobe and lobules of lateral lobes rounded or obtuse, and apiculate at apex |
|
12 R. junipericola |
| + |
Basal leaf blade with lobes and lobules acute or slightly acute, and not apiculate at apex. |
|
(91) |
| |
|
|
|
| 91 (90) |
Basal leaf blade 3-partite slightly beyond middle, lateral lobes oblique cuneate or oblique oblong, unequally 2-lobed or 2-cleft, glabrous or abaxially puberulent, base rounded, broadly cuneate, or subtruncate at base |
|
43 R. popovii |
| + |
Basal leaf blade 3-partite nearly to base, lateral lobes oblique flabellate, unequally 2-partite, puberulent, base cordate-truncate or truncate |
|
45 R. brotherusii |
| |
|
|
|
| 92 (78) |
Petals 8, oblong |
|
22 R. chinghoensis |
| + |
Petals 5 (sometimes 6 in R. petrogeiton, R. songoricus, and R. trautvetterianus). |
|
(93) |
| |
|
|
|
| 93 (92) |
Receptacle glabrous. |
|
(94) |
| + |
Receptacle puberulent. |
|
(101) |
| |
|
|
|
| 94 (93) |
Petals cuneate, oblong, or long elliptic. |
|
(95) |
| + |
Petals obovate or broadly obovate, sometimes oblong-obovate in R. petrogeiton. |
|
(97) |
| |
|
|
|
| 95 (94) |
Stems slender, prostrate, up to 20 cm, glabrous, rooting at nodes |
|
19 R. pegaeus |
| + |
Stems erect, 4.2--5 cm tall, usually puberulent, not rooting. |
|
(96) |
| |
|
|
|
| 96 (95) |
Basal leaf blade puberulent on both surfaces or only adaxially; petals cuneate, apex truncate; ovary longer than style |
|
10 R. minor |
| + |
Basal leaf blade glabrous; petals long elliptic, apex obtuse; ovary shorter than style |
|
18 R. micronivalis |
| |
|
|
|
| 97 (94) |
Basal leaf blades up to 3 cm wide, 3-partite slightly beyond middle, glabrous |
|
11 R. munroanus |
| + |
Basal leaf blades smaller, up to 1.8--2 cm wide, 3-partite nearly to base, often hairy. |
|
(98) |
| |
|
|
|
| 98 (97) |
Basal leaves yellowish strigose |
|
25 R. hirtellus |
| + |
Basal leaves glabrous or white puberulent on one or other surface. |
|
(99) |
| |
|
|
|
| 99 (98) |
Petal apex emarginate |
|
9 R. platypetalus |
| + |
Petal apex not emarginate. |
|
(100) |
| |
|
|
|
| 100 (99) |
Basal leaves leathery, glabrous or adaxially puberulent |
|
16 R. glareosus |
| + |
Basal leaves papery, glabrous or abaxially sparsely puberulent |
|
17 R. petrogeiton |
| |
|
|
|
| 101 (93) |
Plants aquatic. |
|
(102) |
| + |
Plants terrestrial. |
|
(103) |
| |
|
|
|
| 102 (101) |
Basal leaf blade 3-partite; central lobe 3-lobed or undivided, ultimate lobules ovate |
|
82 R. radicans |
| + |
Basal leaf blade 3-sect; central lobe 1 or 2 × dissected, ultimate lobules narrowly ovate to linear-lanceolate |
|
83 R. gmelinii |
| |
|
|
|
| 103 (101) |
Lateral lobes of basal leaf pectinately 4- or 5-cleft, glabrous |
|
5 R. rigescens |
| + |
Lateral lobes of basal leaf not pectinately cleft. |
|
(104) |
| |
|
|
|
| 104 (103) |
Leaf blade leathery; sepals persistent. |
|
(105) |
| + |
Leaf blade papery; sepals deciduous. |
|
(106) |
| |
|
|
|
| 105 (104) |
Receptacle densely yellow puberulent |
|
20 R. glacialiformis |
| + |
Receptacle white puberulent |
|
8 R. balangshanicus |
| |
|
|
|
| 106 (104) |
Basal leaf blade up to 4--4.4 cm wide. |
|
(107) |
| + |
Basal leaf blade up to 2.4 cm wide. |
|
(108) |
| |
|
|
|
| 107 (106) |
Basal leaves cordate at base, 3-partite nearly to base |
|
1 R. songoricus |
| + |
Basal leaves truncate-cordate at base, 3-partite slightly beyond middle |
|
2 R. trautvetterianus |
| |
|
|
|
| 108 (106) |
Petals narrowly obovate or oblong, 1.4--2 mm wide |
|
7 R. yinshanicus |
| + |
Petals obovate or broadly obovate, 4--11 mm wide. |
|
(109) |
| |
|
|
|
| 109 (108) |
Stems 2--12 cm; basal leaves 0.7--1.2 cm wide; petal apex emarginate |
|
9 R. platypetalus |
| + |
Stems 19--24 cm; basal leaves 1.6--2.4 cm wide; petal apex rounded |
|
68 R. menyuanensis |
