1	"Corolla lobes spreading or erect, rounded; anthers free; leaf 1.5--3.5 cm; heterostylous"	"Primula suffrutescens"
1	"Corolla lobes reflexed, generally acute; anthers +- adherent into a cone; leaf (2)12--30 cm; homostylous"	2
2	"Stigma enlarged (>> style in width); anther connective wrinkled, dark maroon to black; filaments < 1.5 mm, free or joined by thin membrane but not fused into tube"	3
2	"Stigma +- not enlarged (+- = style in width); anther connectives smooth or wrinkled, yellow or dark; filaments 1--4 mm, fused into tube, or < 1.5 mm, free"	5
3	"Corolla tube generally covering anther bases; flower parts in 5s; anther tips acute; plant densely glandular-hairy"	"Primula fragrans"
3	"Corolla tube not covering anther bases; flower parts in 4s or 5s; anthers tips truncate to obtuse; plant glabrous to glandular-hairy"	4
4	"Leaf 9--50 cm, linear-oblanceolate to oblanceolate; stem glandular-hairy; inflorescence glandular-hairy; flower parts in 4s or 5s; fruit circumscissile or with valves, sometimes both on 1 plant"	"Primula jeffreyi"
4	"Leaf 2--20 cm, linear to linear-oblanceolate; stem glabrous; inflorescence glabrous to +- glandular-hairy; flower parts in 4s; fruit with valves"	"Primula tetrandra"
5	"Anther connectives smooth (to longitudinally wrinkled when dry); fruit circumscissile or with valves"	6
5	"Anther connectives transversely wrinkled; fruit circumscissile"	7
6	"Corolla lobe generally 9--14 mm, magenta to lavender; roots white, without bulblets; fruit with valves"	"Primula pauciflora"
6	"Corolla lobe generally 5--9 mm, magenta to white; roots +- red, with many bulblets; fruit circumscissile"	"Primula subalpina"
7	"Leaf blade generally tapered to petiole, length generally > 2.5 &times; width; filament tube > 2 mm; connective dark, smooth or obscurely wrinkled (if leaf narrowed abruptly to petiole, then filament tube < 1.5 mm, connective dark, generally smooth)"	8
7	"Leaf blade generally narrowed abruptly to petiole, length generally < 2.5 &times; width; filament tube 1--4 mm; connective dark, generally wrinkled"	9
8	"Anther 5--9 mm, filament 0.5--1.5 mm, free or fused into tube; corolla lobe generally 7--20 mm"	"Primula conjugens"
8	"Anther 3--4 mm, filament 2--3.5 mm, fused into tube; corolla lobe generally 5--9 mm"	"Primula subalpina"
9	"Leaf blade length generally < 2 &times; width; filament tube generally < 3 mm wide; root bulblets present at flower"	"Primula hendersonii"
9	"Leaf blade length generally > 2 &times; width; filament tube generally 3--4 mm wide; root bulblets 0"	10
10	"Anther connectives yellow; filament tube without yellow or white spot below each anther, sometimes all yellow"	"Primula clevelandii var. clevelandii"
10	"Anther connectives maroon to black; filament tube with or without yellow or white spot below each anther"	11
11	"Filament tube without yellow or white spot below each anther"	"Primula clevelandii var. insularis"
11	"Filament tube with yellow or white spot below each anther"	12
12	"Anther dark red, black, or generally yellow, tip acute to obtuse"	"Primula clevelandii var. gracilis"
12	"Anther generally dark purple, tip obtuse to notched"	"Primula clevelandii var. patula"