GENTIANACE^E 61 



Order LV. GENTIANACE^E. 



Flowers regular, solitary or in cymes ; calyx 4-5- 

 toothed; corolla 4-5-lobed; stamens 4-8; ovary usually 

 2-celled ; seed-vessel usually a i-2-celled capsule; leaves 

 generally opposite and entire. A large order, belonging 

 chiefly to the cold and temperate parts of the globe. 



i. CHLORA, L. 



Flowers yellow, in dichotomous cymes; calyx-teeth, 

 corolla-lobes, and stamens 6-8 each; ovary I -celled; 

 style bifid ; seed-vessel a 2-valved capsule. Not alpine. 



C. perfoliata, L., Yellow Centaury; stem-leaves com- 

 pletely connate at the base ; open hill-sides, frequent. 

 C. serotina, Koch ; a smaller plant with paler flowers, 

 calyx-teeth longer, stem-leaves only partially connate; 

 very rare ; Canton de Vaud, Valais, Zurich. 



2. ERYTHR^A, Pers. 



Flowers small, usually pink, in trichotomous cymes ; 

 corolla funnel-shaped ; calyx-teeth, corolla-lobes, and 

 stamens 4-5 each ; anthers twisted spirally ; ovary par- 

 tially 2-celled. Not alpine. 



E. Centaurium, Pers., Centaury, with numerous varie- 

 ties ; stem-leaves partially connate ; banks, common. 



3. SWERTIA, L. 



Flowers in racemes; calyx 5 -toothed ; corolla rotate, 

 5-lobed, with two nectariferous glands; capsule i-celled. 



