268 Craib — Primulas of Petiolaris-Sonchifolia Section. 



Corolla lobes rather deeply 2- or 3-lobed, the tube 7.5-10 mm. 



long ; scape not developed. 



Leaves with a dense coating of sulphur farina on the under 



surface ; pedicels 1.5-2 cm. long . . II. sulphurea. 



Leaves efarinose or with sparse whitish or pale yellow 



farina; pedicels not exceeding about 1 cm. in 



length 13- Cunninghamii. 



Corolla lobes acuminate or shallowly 3-lobed or irregularly lobed 

 or dentate, the lobules or teeth triangular, acute or acumi- 

 nate, sometimes obtuse but not rounded at the apex. 

 Corolla tube villous inside towards the apex ; leaves in a dense 

 rosette, sessile or the outer with broadly winged short 

 petioles, coriaceous, drying pale dull green, the broad midrib 

 and the lateral nerves prominent below ; calyx lobes entire 

 or casually tridentate at the apex ; almost efarinose at 

 flowering "time, densely sulphur-farinose before flowering 

 . 17. deuteronana. 



with minute hairs only, 

 linate or if. tridentate then the 

 leaves sessile or with a short 

 or occasionally fairly long winged petiole, rather thin, 

 efarinose ; calyx lobes entire, aristate or almost aristate- 



acuminate 16. sessilis. 



Corolla lobes or their teeth not acuminate (most often acute, 

 very rarely subacuminate, but never distinctly long- 

 acuminate). 

 Outside of calyx and the pedicels very densely covered 

 with glandular papillae ; leaves in a dense rosette, 

 the inner oblong, sessile, the outer more or less ellip- 

 tic, long petioled ; buds with dense pale yellow 

 farina ; calyx lobes nearly always trilobulate . 



19. irregularis. 



Outside of calyx and the pedicels minutely and sparsely 

 puberulous or farinose, calyx lobes exceptionally 

 tridentate. 

 Calyx brown or reddish-brown. 



Corolla in bud farinose, its lobes regularly and sub- 

 equally 3-toothed ; leaves in a dense rosette, as 

 in P. irregularis, but outer petioled leaves some- 

 times wanting ; short scape sometimes present ; 

 calyx lobes entire or casually tridentate . 



• . . 21. Boothii. 



Corolla in bud efarinose, its lobes usually unequally 

 3-toothed, but often irregularly toothed. 

 Scape present, though sometimes quite short, and 

 included in the dense rosette of leaves which are 

 all sessile, or with a short and broadly winged 

 petiole, with occasionally the outer long petioled 

 leaves still present ; calyx lobes entire, acu- 

 minate, acute .... 23. scapigera. 

 Scape wanting. 



Leaf margin erose-denticulate, leaves all sessile, 

 or a few outer ones with winged petioles about 

 as long as the lamina, calyx lobes entire, acute 



