CHLORA. ERYTHRJEA. 221 



Suborder I. Gentianea. Tribe I. Chlorece. 



1. CHLORA Linn. Yellow-wort. 



1. C. perfoliata (L.); lowermost 1. elliptic-oblong narrowed 

 below, stem-1. broadly connate, st. perfoliate. E. B. 60. R. xvii. 

 1060. St. 12 18 in. high, simple. Stem-1. triangular-ovate, 

 connected by their whole breadth in rather distant pairs, glau- 

 cous. Panicle forked, many-flowered. Cal. divided to its base 

 into linear- subulate segments. Cor. bright yellow. Stigmas 

 yellow. Dry calcareous hills. A. VII. IX. E. I. 



Tribe II. Erythraea. 



2. ERYTHR^EA Eenealm. Centaury. 



1. E. pulchella (Fries) ; st. erect much branched acutely qua- 

 drangular, 1. ovate the uppermost oblong-lanceolate, fl. all 

 stalked axillary and terminal, cal. rather shorter than the tube of 

 the opening corolla, lobes of the cor. elliptic-oblong obtuse. 

 E. B. 458. St. quite simple, 1 in. high and single-flowered ; or 

 very much branched, even from the base, 6 8 in. high, with very 

 many flowers. Radical 1. very few. Inflorescence forked, the 

 lateral fl. distant from the floral leaves. The length of the tube 

 must be observed exactly at the time when the flower is about 

 to expand. Sandy ground. A. VII. IX. 



2. E. Centaurium (Pers.) ; st. erect branched above quadran- 

 gular, 1. elliptic-oblong the upper ones acute, fl. nearly sessile 

 corymbosely panicled, cal. not half as long as the tube of the 

 opening corolla, lobes of the cor. oval. E. B. 417. St. 6 18 

 in. high, usually simple below. Panicles of fl.lax. Lateral fl. 

 apparently stalked but sessile between the small floral leaves. 

 Radical 1. many. Dry pastures. A. VII. VIII. 



3. E. latifolia (Sm.) ; st. short branched from the base qua- 

 drangular, 1. broadly elliptical obtuse, fl. in dense forked tufts 

 sessile, cal. rather shorter than the tube of the opening corolla, 

 lobes of the cor. lanceolate. .E. B. S. 2719. St. thick, 23 in. 

 high, sometimes taller and branched, usually dividing into 3 main 

 branches. Fl. densely aggregated. Radical 1. very large, with 

 5 7 ribs, many. " Cor.-lobes sometimes oval." Mr. Watson. 

 Near the sea-shore. A. VI. VIII. E. I. 



4. E. littoralis (Fries) ; st. simple solitary or several from the 

 crown of the root, 1. oblong-linear obtuse narrowed below, radical 

 1. crowded spathulate, fl. sessile between the floral 1. densely 

 corymbose, calyx as long as the tube of the opening corolla, lobes 



