| 1 |
Margin of basal leaves glabrous or apparently so. |
|
(2) |
| + |
Margin of basal leaves ciliate. |
|
(9) |
| |
|
|
|
| 2 (1) |
Flowers with conspicuous nectary disc surrounding ovary; pedicels white eglandular pilose. |
|
(3) |
| + |
Flowers without conspicuous nectary disc; pedicels brown glandular pilose or glabrous. |
|
(4) |
| |
|
|
|
| 3 (2) |
Leaves alternate; petals broadly elliptic, 3-4 × 2-2.5 mm |
|
139 S. engleriana |
| + |
At least some leaves opposite; petals elliptic, ca. 2 × 1.1 mm |
|
140 S. contraria |
| |
|
|
|
| 4 (2) |
Pedicels sparsely glandular pilose; petals broadly elliptic, 7-8 × 5-6 mm |
|
132 S. drabiformis |
| + |
Pedicels glabrous; petals elliptic or narrowly ovate to suboblong, 2-7 × 1-3 mm. |
|
(5) |
| |
|
|
|
| 5 (4) |
Petals 1-veined |
|
152 S. uninervia |
| + |
Petals at least 3-veined. |
|
(6) |
| |
|
|
|
| 6 (5) |
Leaves to 4 mm, tightly imbricate; plants forming a compact cushion; petals 2-3 mm |
|
141 S. atuntsiensis |
| + |
Leaves at least 4.5 mm, laxly imbricate; plants erect or forming a mat; petals at least 4 mm. |
|
(7) |
| |
|
|
|
| 7 (6) |
Petals purple abaxially and yellow adaxially, or yellow throughout |
|
149 S. glacialis |
| + |
Petals yellow abaxially. |
|
(8) |
| |
|
|
|
| 8 (7) |
Plants usually less than 7 cm tall; apex of cauline leaves mucronate |
|
150 S. flexilis |
| + |
Plants at least 7 cm tall; apex of cauline leaves obtuse |
|
146 S. carnosula |
| |
|
|
|
| 9 (1) |
Margin of basal leaves glandular ciliate distally. |
|
(10) |
| + |
Margin of basal leaves eglandular setose-ciliate or fimbriate-ciliate distally, occasionally so only proximally. |
|
(17) |
| |
|
|
|
| 10 (9) |
Flowering stem submerged in foliage. |
|
(11) |
| + |
Flowering stem visible, overtopping foliage. |
|
(13) |
| |
|
|
|
| 11 (10) |
Leaves glabrous adaxially |
|
129 S. jainzhuglaensis |
| + |
Leaves glandular pilose adaxially. |
|
(12) |
| |
|
|
|
| 12 (11) |
Basal leaves with long, glandular hairs, apex aristate |
|
128 S. jacquemontiana |
| + |
Basal leaves with short, glandular hairs, apex glandular but not aristate |
|
127 S. paiquensis |
| |
|
|
|
| 13 (10) |
Basal leaves with long, curly, glandular and eglandular hairs at least at margin |
|
135 S. llonakhensis |
| + |
Basal leaves with short, glandular hairs. |
|
(14) |
| |
|
|
|
| 14 (13) |
Petals 5.5-7 mm |
|
130 S. finitima |
| + |
Petals to 5 mm. |
|
(15) |
| |
|
|
|
| 15 (14) |
Leaves very sparsely glandular ciliate; leaves to 1 mm wide |
|
143 S. medogensis |
| + |
Leaves densely glandular ciliate; leaves at least 1 mm wide. |
|
(16) |
| |
|
|
|
| 16 (15) |
Pedicels 6-9 mm; leaf margin denticulate-ciliate |
|
148 S. nanella |
| + |
Pedicels usually at least 1 cm; leaf margin pilose-ciliate |
|
131 S. stella-aurea |
| |
|
|
|
| 17 (9) |
Flowers with conspicuous nectary disc surrounding ovary; pedicels white eglandular pilose. |
|
(18) |
| + |
Flowers without conspicuous nectary disc; pedicels brown glandular pilose or glabrous. |
|
(19) |
| |
|
|
|
| 18 (17) |
Leaves alternate; petals broadly elliptic, 3-4 × 2-2.5 mm |
|
139 S. engleriana |
| + |
At least some leaves opposite; petals narrowly elliptic, ca. 2 × 1.1 mm |
|
140 S. contraria |
| |
|
|
|
| 19 (17) |
Apical margin of basal leaves fimbriate, hairs often united to form a scarious margin. |
|
(20) |
| + |
Apical margin of basal leaves setose-ciliate or glabrous. |
|
(22) |
| |
|
|
|
| 20 (19) |
Flowering stem submerged in foliage |
|
124 S. hemisphaerica |
| + |
Flowering stem short, but overtopping foliage. |
|
(21) |
| |
|
|
|
| 21 (20) |
Basal leaves abaxially convex distally, adaxially concave (spoonlike) |
|
122 S. perpusilla |
| + |
Basal leaves ± flat |
|
123 S. zhidoensis |
| |
|
|
|
| 22 (19) |
Flowering stem not overtopping leaves |
|
125 S. sessiliflora |
| + |
Flowering stem overtopping leaves. |
|
(23) |
| |
|
|
|
| 23 (22) |
Cyme 2-5(-12)-flowered. |
|
(24) |
| + |
Flower solitary. |
|
(32) |
| |
|
|
|
| 24 (23) |
Distal cauline leaves longer than proximal ones, aggregated to form a "rosette" subtending inflorescence. |
|
(25) |
| + |
Distal cauline leaves smaller than or subequaling median and proximal ones, not aggregated. |
|
(26) |
| |
|
|
|
| 25 (24) |
Petals 4-5 mm |
|
148 S. nanella |
| + |
Petals 6-7 mm |
|
145 S. prattii |
| |
|
|
|
| 26 (24) |
Pedicels glabrous. |
|
(27) |
| + |
Pedicels glandular pilose, sometimes sparsely so. |
|
(28) |
| |
|
|
|
| 27 (26) |
Petals red or purple abaxially, yellow and unspotted adaxially |
|
149 S. glacialis |
| + |
Petals yellow abaxially, yellow and brown spotted adaxially |
|
150 S. flexilis |
| |
|
|
|
| 28 (26) |
Sepals reflexed at anthesis. |
|
(29) |
| + |
Sepals erect or spreading at anthesis. |
|
(30) |
| |
|
|
|
| 29 (28) |
Margin of sepals glandular pilose, sometimes sparsely so |
|
154 S. densifoliata |
| + |
Margin of sepals glabrous |
|
153 S. aurantiaca |
| |
|
|
|
| 30 (28) |
Base of petals obtuse, neither tapered nor contracted into a claw |
|
147 S. dshagalensis |
| + |
Base of petals tapered or contracted into a claw. |
|
(31) |
| |
|
|
|
| 31 (30) |
Proximal cauline leaves setose-ciliate along entire margin |
|
154 S. densifoliata |
| + |
Proximal cauline leaves setose-ciliate at distal margin only |
|
151 S. tatsienluensis |
| |
|
|
|
| 32 (23) |
Axils of cauline leaves with leaf buds |
|
142 S. gemmigera |
| + |
Axils of cauline leaves without leaf buds. |
|
(33) |
| |
|
|
|
| 33 (32) |
Petals to 5 mm. |
|
(34) |
| + |
Petals at least 5 mm. |
|
(38) |
| |
|
|
|
| 34 (33) |
Petals red or purple abaxially, yellow and unspotted adaxially |
|
149 S. glacialis |
| + |
Petals yellow abaxially, yellow and orange spotted adaxially. |
|
(35) |
| |
|
|
|
| 35 (34) |
Pedicels pale eglandular pilose. |
|
(36) |
| + |
Pedicels glandular pilose or glabrous. |
|
(37) |
| |
|
|
|
| 36 (35) |
Basal leaves to 4 mm |
|
137 S. baimashanensis |
| + |
Basal leaves at least 5 mm |
|
136 S. miralana |
| |
|
|
|
| 37 (35) |
Plants to 4 cm tall |
|
148 S. nanella |
| + |
Plants at least 4 cm tall |
|
52 S. auriculata |
| |
|
|
|
| 38 (33) |
Margin of sepals ciliate. |
|
(39) |
| + |
Margin of sepals entire, glabrous. |
|
(43) |
| |
|
|
|
| 39 (38) |
Margin of sepals setose-ciliate. |
|
(40) |
| + |
Margin of sepals glandular ciliate. |
|
(41) |
| |
|
|
|
| 40 (39) |
Basal leaves 3-4 mm; sepals erect; petals 5-8 mm |
|
126 S. brevicaulis |
| + |
Basal leaves ca. 6 mm; sepals spreading to reflexed; petals 5-6 mm |
|
133 S. chrysanthoides |
| |
|
|
|
| 41 (39) |
Sepals reflexed, at least 3 mm |
|
138 S. draboides |
| + |
Sepals spreading or reflexed, to 2.5 mm. |
|
(42) |
| |
|
|
|
| 42 (41) |
Proximal cauline leaves ciliate distally |
|
151 S. tatsienluensis |
| + |
Proximal cauline leaves ciliate at least proximally |
|
145 S. prattii |
| |
|
|
|
| 43 (38) |
Margin of cauline leaves glabrous |
|
134 S. filifolia |
| + |
Margin of cauline leaves ciliate. |
|
(44) |
| |
|
|
|
| 44 (43) |
Pedicels glabrous. |
|
(45) |
| + |
Pedicels glandular or eglandular pilose. |
|
(46) |
| |
|
|
|
| 45 (44) |
Cauline leaves 5.7-5.9 mm, distal ones subequaling proximal ones |
|
150 S. flexilis |
| + |
Cauline leaves 2-5 mm, distal ones larger than proximal ones |
|
145 S. prattii |
| |
|
|
|
| 46 (44) |
Pedicels eglandular pilose |
|
136 S. miralana |
| + |
Pedicels glandular pilose. |
|
(47) |
| |
|
|
|
| 47 (46) |
Petals apparently without callosities |
|
145 S. prattii |
| + |
Petals with 2-5 callosities. |
|
(48) |
| |
|
|
|
| 48 (47) |
Sepals erect to spreading. |
|
(49) |
| + |
Sepals reflexed. |
|
(50) |
| |
|
|
|
| 49 (48) |
Base of petals obtuse, neither tapered nor contracted into a claw |
|
147 S. dshagalensis |
| + |
Base of petals tapered or contracted into a claw |
|
151 S. tatsienluensis |
| |
|
|
|
| 50 (48) |
Sepal veins free, not confluent at apex; petals to 2.6 mm wide |
|
153 S. aurantiaca |
| + |
Sepal veins confluent at apex; petals at least 3 mm wide |
|
144 S. nanelloides |
