284 51. GENTIANACEJ3. 



1. VINCA. Cor. salvershaped ; tube long 1 , with 5 angles at 

 the mouth, closed by speading hairs and the conuivent 

 stamens ; limb flat, 5-lobed. Stigma capitate with a ring" 

 at its base. Fr. of 2 erect long slender follicles or rarely one, 

 2 glands alternating with them. 



1. VIN'CA Linn. Periwinkle. 



tl. V. minor (L.) ; st. procumbent, 1. lanceolate-elliptic, their 

 margins as well as those of the small lanceolate calyx-segments 

 glabrous. E. B. 917. St. rooting. Flowering branches erect. 

 Fl. smaller than those of the next, blue, rarely white. Woods 

 and thickets. P. V. VI. Lesser Periwinkle. E. L 



[2. V. major (L.) ; st. somewhat ascending, 1. ovate acute or 

 subcordate, their margins as well as those of the long subulate 

 calyx-segments ciliate. E. . 514. St. at first ascending, 

 afterwards prostrate and rooting. Flowering shoots erect. Fl. 

 large, purplish blue. Hedges and thickets, introduced. P. 

 IV. V. Greater PeriivinkleJ] E. I. 



Order LI. GENTIANACE^E. 



Cal. inferior, divided, persistent. Cor.regular, 4 8-fid, hypo- 

 gynous, marcescent ; imbricate and twisted, rarely induplicate 

 in the bud. Stain, inserted on the cor., as many as the segments. 

 Anth. versatile. Ovary of 2 carpels with the edges slightly in- 

 flexed or meeting. Caps, many-seeded, generally two-valved. 

 No stipules. 



Subord. I. GENTIANE^G. Corolla twisted in the bud. 

 L. opposite. 



* Style deciduous. 

 Tribe I. CRLORE^. Corolla rotate. 



1. BLACKSTONIA. Cal. 8-parted. Cor. nearly rotate, 

 8-parted. Stam. 8. Style 1. Stigma 2 4-cleft. Caps. 

 1-celled placentas on the inflexed margin of the valves. 



Tr. II. ERYTHRJEE&. Corolla funnel- or salver-shaped. 



2. ERYTHEMA. Cal. 4 5-fid. Cor. funnel-shaped, limb 

 short, 4 5-fid. Stam. 4 5. Anth. erect, at length spirally 

 twisted. Style simple ; stigmas 2. Caps, imperfectly 2- 

 celled from the inflexed margins of the valves. 



