BLACKSTONIA. ERYTHILEA. 285 



3. CICENDIA. Cal. 4-partite or lobed. Cor. salver-shaped, 

 limb short, 4-tid. Stam. 4. Anth. erect, not twisted. 

 Stio-ma capitate, undivided. Caps. 1- or imperfectly 2- 

 celled. 



** Style persistent or stigma sessile. 

 Tr.III. SWEUTIEJE. Style often wanting, stigma persistent. 



4. GENTIANA. Cal. 4 5-cleft. Cor. funnel- or salver-shaped, 

 limb 4 5-cleft. Stain. 4 5, straight. Stigmas 2. Caps. 

 1-celled, seeds on the inflexed margins of the valves. 



Subord. II. MENYANTHE^R. Corolla induplicate in the 

 bud. L. alternate, or opposite to the fl.-stems. 



5. LIMNANTHEMUM. Cal. 5-parted. Cor. rotate, thin ; limb 

 5-parted, smooth on the disk, hairy or scaly at the base 

 within. Stam. 5. Stigma with two toothed lobes. Caps. 

 1 -celled, not bursting. L. simple, floating. 



6. MENYANTHES. Cal. 5-parted. Cor. funnelshaped, fleshy ; 

 limb 5-parted hairy within. Stam. 5. Stigma capitate, 

 notched. Caps. 1-celled, 2-valved ; valves bearing the 

 seeds along their middle. L. ternate. 



Suborder I. Gentianea. Tribe I. Chlorea. 



1. BLACKSTONIA Huds.[Clilora Linn. ed. viii.]. 

 Yellow wort. 



1. B. perfolidta (Huds.) ; lowermost 1. elliptic-oblong narrowed 

 below, stern-1. broadly connate. E. B. 60. JR. xvii. 1060. 

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

 ovate, connected by their whole breadth in rather distant pairs, 

 glaucous. Panicle forked, many-flowered. Cal. divided to 

 its base into linear-subulate segments. Cor. bright yellow. 

 Stigmas yellow. Damp chalky places. A. VII. IX. E. I. 



Tribe II. Erythr&ece. 



2. EKYTHK^'A Necker. Centaury. 

 * Stamens from top of cor. -tube. Caps, included. 



1. E. ramosiss'ima (Pers.) ; st. much branched acutely qua- 

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

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



