270 



THE FLORA. 



Order XCY.— GENTIA]S\CE.^. The Gentianworts. 



Herbs with opposite, entire, 

 smooth leaves^ and showy 

 rQ^xAav flowers ; 



corolla usually twisted in the 

 bud, with as many lobes as 



stamens^ and alternate with 

 them, mostly persistent 

 and withering ; 



stigmas 1 or 2 ; 



otary 1-celled, superior, be- 

 coming a 2-valved 



pod with many seeds. 



Analysis of the Genera. 



§ Leaves opposite or whorl ed, 



sometimes minute. Corolla 



mostly twisted in bud. . . .2 

 § Leaves alternate or radical. 



Corolla valvate in the bud 



2 Corollawitha glandular spot 

 on each lobe, sometimes 



with spurs c 



2 Corolla without glandular 



spots or spurs 3 



3 Corolla tubular, the tube longer than the limb a 



S Corolla deeply cleft, mostly wheel-shaped, tube very short.... b 

 a Sepals 4 or 5. Corolla fringed, or with folds between lobes. Anthers straight. 



Gentia'na. 1 

 a Sepals 4 or 5. Anthers spirally twisted. European Centaury. Erythr^'a. 



a Sepals 2, leaf-like. Cor. 4-cleft, white or purplish. Pennywort. Obola''ria. 

 b Leaves very small or mere bracts. Fls. 4-parted. Screxo-stem. Barto'nia. 

 b Leafy. Fls. 5-12-parted. Anthers curved. American Centaury. Sabba'tia. 2 

 c Corolla 4-parted, with 4 spurs beneath at base. Spurred Gentlar^. Hale'nia. 

 c Cor. 4-parted, without spurs. Tall, with whorled leaves. Columbo. Fba'seua. 

 d Corolla bearded inside. Leaves 8-foliate, on long stalks. 



Jjuck-bean. Menyan'thes. 

 d Corolla smooth inside. Leaves simple, floating. 



Floating Heart. Limnan'themum. 



Fig.&lh. Gentiana Andrewsii. 6. The calyx and 

 capsule. 7. The corolla laid open, showing the fold? 

 (2-lobed) between the proper petals, and the stamens 

 attached at base. 8. Capsule cut across. 9. Seed 

 magnified, with its large, loose testa. 



