| 1 |
Inflorescences subcapitate, short pedicellate; calyx actinomorphic. |
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(2) |
| + |
Inflorescences capitate or spicate; flowers sessile, reflexed; calyx ± zygomorphic. |
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(13) |
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| 2 (1) |
Bracts broadly ovate to elliptic, leaflike; leaf blade broadly elliptic to suborbicular, base truncate or slightly cordate, evergreen |
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266 Primula dryadifolia |
| + |
Bracts lanceolate to ovate-lanceolate; leaf blade not as above. |
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(3) |
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| 3 (2) |
Flowers spreading or ± nodding; bracts and flower buds overlapping, forming a tuft or crown at apex |
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276 Primula capitata |
| + |
Flowers erect; bracts not forming a crown at apex. |
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(4) |
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| 4 (3) |
Plants with basal bud scales at anthesis. |
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(5) |
| + |
Plants without basal bud scales at anthesis. |
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(6) |
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| 5 (4) |
Leaves puberulent or glabrescent; corolla exannulate |
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269 Primula denticulata |
| + |
Leaves glabrous; corolla annulate |
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270 Primula monticola |
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| 6 (4) |
Leaves pubescent. |
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(7) |
| + |
Leaves glabrous. |
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(9) |
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| 7 (6) |
Inflorescences loose; pedicel 2-5 mm; leaves pilose |
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273 Primula laxiuscula |
| + |
Inflorescences compact; pedicel less than 2 mm; leaves septate or scabrous glandular pubescent. |
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(8) |
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| 8 (7) |
Flowering scapes (1-)4-8(-15) cm; leaves with fine scabrous glandular hairs |
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271 Primula atrodentata |
| + |
Flowering scapes (6-)10-30 cm; leaves with white septate hairs |
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272 Primula erythrocarpa |
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| 9 (6) |
Calyx parted below middle, lobes acute |
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275 Primula glomerata |
| + |
Calyx parted only to middle, lobes obtuse. |
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(10) |
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| 10 (9) |
Inflorescences 2-4 cm in diam.; flowering scapes to 35 cm |
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274 Primula pseudodenticulata |
| + |
Inflorescences 1-1.5 cm in diam.; flowering scapes to 11 cm. |
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(11) |
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| 11 (10) |
Leaves conspicuously denticulate; bracts not concealing pedicels |
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197 Primula glabra |
| + |
Leaves entire or obscurely denticulate; bracts concealing pedicels, ca. 1/2 as long as calyx. |
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(12) |
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| 12 (11) |
Leaves densely glandular; calyx and bracts often tinged with purple |
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198 Primula kongboensis |
| + |
Leaves sparsely glandular; calyx and bracts green, puberulent |
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199 Primula pseudoglabra |
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| 13 (1) |
Corolla tube 1.8-4 cm, limb 2-3 cm wide |
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294 Primula sherriffiae |
| + |
Corolla tube and limb usually less than 1.1 cm. |
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(14) |
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| 14 (13) |
Corolla lobes acute at apex. |
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(15) |
| + |
Corolla lobes rounded, truncate, or lobed at apex. |
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(16) |
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| 15 (14) |
Bracts and calyx crimson; scapes glabrous |
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278 Primula vialii |
| + |
Bracts and calyx green or tinged with purple; scapes sparsely pilose |
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279 Primula gracilenta |
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| 16 (14) |
Leaves scabrous-pubescent |
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280 Primula violacea |
| + |
Leaves with long multicellular hairs or subglabrous. |
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(17) |
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| 17 (16) |
Corolla tube only slightly longer than calyx; limb subglobose |
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281 Primula concholoba |
| + |
Corolla tube at least 2 × as long as calyx, limb funnelform. |
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(18) |
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| 18 (17) |
Style of thrum flower reaching middle of corolla tube. |
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(19) |
| + |
Style of thrum flower approaching base of corolla tube. |
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(20) |
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| 19 (18) |
Corolla deep indigo-purple; lobes nearly quadrate, apex truncate or obscurely emarginate |
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282 Primula watsonii |
| + |
Corolla bluish violet to pale purple; lobes ovate to suborbicular, margin entire |
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283 Primula giraldiana |
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| 20 (18) |
Leaf blade obovate to oblanceolate, entire to repand-crenulate, subsessile |
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284 Primula cernua |
| + |
Leaf blade usually elliptic to lanceolate, crenate, dentate, or lobed, distinctly petiolate. |
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(21) |
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| 21 (20) |
Inflorescences ± white farinose |
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285 Primula bellidifolia |
| + |
Inflorescences efarinose or yellow farinose. |
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(22) |
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| 22 (21) |
Corolla lobes spreading |
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286 Primula aerinantha |
| + |
Corolla lobes ± erect. |
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(23) |
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| 23 (22) |
Scapes pilose or subglabrous |
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287 Primula deflexa |
| + |
Scapes glabrous. |
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(24) |
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| 24 (23) |
Leaf blade crenate-dentate; corolla lobes truncate to emarginate at apex |
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288 Primula muscarioides |
| + |
Leaf blade deeply incised-lobulate or pinnatifid or very coarsely dentate; corolla lobes rounded or nearly so at apex |
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289 Primula pinnatifida |
