GENTIAN ACE.E. 



565 



IV. CHLORA. CHLORA. 



Glaucous annuals, with yellow flowers. Calyx deeply divided as in 

 Erythrcea, but into 8 lobes. Corolla-tube very short ; the limb spread- 

 ing, 8-lobed. Stamens 8. Style persisting on the capsule as in 

 Gentian. 



Besides the British species, the genus includes one or two south 

 European ones. 



1. Perfoliate Chlora. Chlora perfoliate, Linn. (Fig. 675.) 



(Eng. Bot. t. GO. Yellowwort.) 



An erect, rather stiff annual, 2 or 3 

 inches to a foot high, of a pale glaucous- 

 green. Radical leaves in a spreading 

 tuft, those of the stem in distant pairs, 

 broadly connected together at the base, 

 so that the stem appears to pass through 

 them, whence the specific name. Flow- 

 ers of a bright yellow, in rather loose 

 terminal cymes ; the corolla nearly ro- 

 tate. 



In dry pastures, and waste places, 

 generally confined to limestone districts, 

 in western, central, and southern Eu- 

 rope to the Caucasus. In Britain, limited 

 to the southern and central counties of 

 England and Ireland. Fl. summer. 



Fig. 675. 



Y. BUCKBEAN. MENYANTHES. 



A single species, distinguished as a genus from Limnanth by its 

 compound leaves and the capsule opening in 2 valves. 



1. Common Buckbean. Menyanthes trifoliata, Linn. 

 (Fig. .676.) 

 (Eng. Bot. t. 495. Buckbean or Marsh Trefoil.) 

 An aquatic herb, with a creeping rootstock and densely matted roots. 



