Gentianaceae. 99 



ORDER 46 — Gentianaceae. 



Calyx gamosepalous of 5 sepals inferior persistent. Corolla gamopetalous 

 hypogynous regular of 5 petals persistent. Stamens epipetalous alternate 

 with the segments of the corolla. Ovary I -seeded, or 2-celled many-seeded. 

 Style continuous with the ovary or none. Stigmas i or 2. Leaves ribbed 

 without stipules. 



Leaves opposite, 405 



Leaves alternate, 406 



405 Style persistent, 407 



405 Style deciduous, flowers red, ..... Erythr^ea III. 

 406 Leaves entire, . . . . . Limnanthemum V. 



406 Leaves temate, Menyanthes I. 



407 Flowers yellow, Chlora IV. 



407 Flowers blue, Gentiana II. 



I. —MEN YA NTHES. 



MENYAN'THES TRIFOLIA'TA (106). Buckbean. 5—9. Calyx 



(979) 5-partite, corolla pinkish-white funnel-shaped, limb 5-partite spreading 



densely bearded, stamens 5, style i, stigma 2-lobed, root-stock 



creeping, leaves ternate, leaflets obovate, whole plant very bitter. 



Bogs. 



II.— GENTIANA. 



Leaves opposite, calyx 4- or 5-cleft, corolla funnel-shaped 4- or 5-lobed, 

 Btamens 5, ovary I -celled, ovules many, style short or none, stigma 2-lobed. 



Gentia'na Pneunoman'the (30). Marsh Gentian. 8 — 9. Throat of 

 (973) corolla naked, corolla large blue campanulate. [G. {Clapham.) 



GENTIA'NA AMAREL'LA (81). Small-flowered Gentian. 8—9. 

 (976) Throat of corolla fringed, calyx 5-cleft segments equal, corolla pale 

 purple. Dry heaths. 



GENTIA'NA CAMPES'TRIS (85). Field Gentian. 8—9. Throat 

 (978) of corolla fringed, calyx 4-cleft two outer segments larger, corolla pale 

 blue. Chalk and Limestone Bills. 



\\\.~ERYTHRMA. 



ERYTHRiE'A CENTAU'RIUM (98). Common Centaury. 6—9. 

 (967) Flowers bright pink small in cymes, calyx 5-cleft half as long as the 



corolla, corolla funnel-shaped, limb short, leaves ovate, stem erect 



angular. Dry pastures. 



