56 PRIMULACE^. 



* Scapigerous or tufted : flowers chiefly 5-merou8, umbellate or solitary : capsule dehis- 



cent (at least at the apex) by valves: lobes of the corolla imbricated (or sometimes 

 partly convolute) in the bud. 



•i— Stamens exserted, connivent in a cone, monadelplious. 



2. DODECATHEON. Corolla 5-parted with very short tube, and dilated thickened 

 throat; the long and narrow divisions (with the calyx-lobes in flower) reflexed. Stamens 

 inserted on the throat of the corolla : filaments short and flat, monadelphous (but sepa- 

 rable above in age) : anthers lanceolate or linear. Style fihform, exserted : stigma small. 

 Placenta columnar, many-seeded. 



•i— -h- Stamens included, distinct, with short filaments and short and blunt anthers : corolla 

 salverform or f unnelform. 



3. PRIMULA. Corolla with tube surpassing or at least equalling the calyx, and spreading 

 mostly obcordate or eraarginate lobes. Style filiform. Capsule many-seeded. Leaves all 

 radical. 



4. DOUGL ASIA. Corolla with tube equalling or surpassing the calyx, somewhat inflated 

 above ; tlie throat more or less contracted and 5-formicate beneath the sinuses ; lobes 

 entire. Style filiform. Ovary 5-ovuled. Capsule tm-binate, 1-2-seeded. Leaves im- 

 bricated or crowded on tufted stems. 



5. ANDROSACE. Corolla short ; its tube shorter than the calyx ; the throat constricted. 

 Style mostly short. Ovules and seeds numerous or few. Flowers small. 



* * Leafy-stemmed : corolla rotate or somewhat so, and the divisions convolute or some- 



times involute in the bud, in Glaux none : leaves entire. 



-1— Capsule dehiscent vertically by valves or irregularly, mostly globose. 



6. TRIENTALIS. Flowers 7-merous (rarely 5-6- or 8-merous. Corolla completely rotate, 

 without a tube, deeply parted ; the divisions convolute in the bud, ovate to lanceolate and 

 pointed. Filaments long and filiform, united at their insertion into a very short ring : 

 anthers linear, recurving when old. Style filiform. Leaves clustered at the summit of the 

 simple stem. 



7. STEIRONEMA. Flowers 5-merous. Corolla rotate, with no proper tube, deeply parted, 

 and the sinuses rounded ; the divisions ovate, cuspidate-pointed, erose-denticulate above, each 

 separately involute or convolute around its stamen ! Filaments distinct or nearly so on the 

 ring at the base of the corolla : anthers linear and arcuate in age, nearly as in Trientalis: 

 sterile filaments (staminodia) 5, interposed between the fertilje ones, subulate. Capsule 

 10-20-seeded. Flowers nodding on the slender peduncles. Leaves opposite, destitute of 

 dots. Calyx valvate in the bud. v "- 



8. LYSIMACHIA. Flowers 5-merous (or casually 6-7-merous). > Corolla rotate (or short 

 funnelform in some foreign species) ; the divisions entire, convolute in the bud. Filaments 

 more commonly monadelphous at base : anthers oblong or oval. No statninodia or ves- 

 tige of sterile stamens. Capsule few-several-seeded. Herbage commonly glandular-dotted. 

 Stems leafy throughout. Calyx lightly imbricated or valvate in the bud. 



9. GLAUX. Flowers 5-merous. Corolla none. Calyx with 5 petaloid lobes, which are 

 imbricated in the bud and equal the campanulate tube. Stamens on the base of calyx, 

 alternate with its lobes : filaments slender : anthers cordate-ovate. Style filiform : stigma 

 capitate. Capsule 5-valved at apex, few-seeded. Leafy throughout : leaves mainly oppo- 

 site : nearly sessile flowers solitary in the axils. 



+_ ^_ Globose capsule circumscissile, the top falling off as a lid : seeds numerous. 



10. ANAGALLIS. Corolla completely rotate, 5-parted; tlie rounded lobes convolute in 

 the bud, exceeding the 5-parted calyx. Stamens on the base of the corolla : filaments 

 bearded or pubescent : anthers broadly oblong. . 



1 1. CENTUNCULUS. Corolla with a globular tube and a 4-5-lobed limb, shorter than 

 the calyx ; lobes acute. Stamens on the tube of the corolla : filaments short and subulate, 

 beardless : anthers ovate or cordate. 



Tribe III. SAMOLE^. Ovary connate at base with the base of the calyx : ovules 

 as in the preceding tribe. 



12. SAMOLUS. Flowers 5-merous. Corolla perigynous, nearly campanulate ; the rounded 

 lobes imbricated in the bud. Fertile stamens 5, on the tube of the corolla, with short 

 filaments and cordate anthers. Staminodia or sterile filaments 5 in the sinuses of the 

 corolla, or in one species wanting. Style short or slender : stigma obtuse or capitate. 

 Capsule ovate or globular, 5-valved at the apex, many-seeded. Caulescent, alternate- 

 leaved, with racemose flowers. 



