ORDER 95. THE GENTIAKWORTS. 285 



1. GENTIA'NA. Gentian. 



Calyx 4-5-cleft. Corolla 4-5-lobed, regular, usually with plaited folds 

 between the lobes. Stigmas 2, style short or none. Pod oblong, 2-valved, 

 many-seeded. Leaves opposite. Flowers solitary or in cymes. Aug. -Oct. 



Corolla with folded appendages between the 5 lobes. Anthers cohering.... b 

 Coroiia with no appendages between the lobes. Anthers separate. . . .a 

 a Segments it me corolla entire, pale-blue, 5 in number....! 



a Segments 01 tne corolla fringed, mostly but 4, bright blue 2, 3 



o jj'iowers bolitury, terminal, blue or white ... .4 



!) flowers cvistered, yellowish or cream- white.... 5, 6 



> jPlAwors clustered, blue 7-9 



O. qulnqucflo'ra. Five-leaved G. Clusters about 5-flowered. Corolla lobes bristle- 



?ointeri. 

 2 3. crini'ta. Fringed Q. Leaves lanceolate. Corolla conspicuously fringed. 



Height If. 



8 G. det'onsa. Shorn (f. Lvs. linear. Corolla lobes crenato-ciliate. Height If 

 4 G.angustifo'lia. Sand G. Slender, If. erect. Lvs. linear. Flower large, b. or p. 



5 G-. ochroleu'ca. Pule G. Lvs. lance-oval, narrowed to the sessile base. Corolla 



greenish-A-hitc, a third longer than the sepals. S. M. 



6 G. alba. Whitish G. Lvs. lance-ovate, clasping with the broad base. Corolla 



cream-white, 4 times longer than sepals. W. M. 



T G. Andrew's!!. Closed Blue G. Leaves ovate -lanceolate, 3-veined. Corolla never 

 opening, the lobes equalling the 5 fringed folds. (Figs. 615-619.) 



8 G. Sapona'ria. Soapwort G. Plant smooth. Leaves rough-edged, linear-lanceo- 



late. Corolla open, the lobes twice longer than the cleft folds. 



9 G. puber'ula. Rongk G. Plant scabrous. Lvs. lance-ovate, very rough at edge. 



Corolla somewhat bell-shaped, folds very short. W. S. 



2. S ABB ATI A. American Centaury. 



Calyx 5-12-parted. Corolla rotate, limb 5-1 2-parted. Stamens 5-12, 

 Style 2-parted. Capsule 1-celled. Beautiful biennials, with mostly ro- 

 seate flowers. 



Corolla mostly 9 (rarely 7-12)-parted 1, 2 



| Corolla 5 (rircly P)-parted a 



a Branches alternate or forked b 



a Branches opposite. Flowers with a central star....C 



b Flowers white or nearly white 3, 4 



b Flowers rose-red, with a central star.... 5, tt 

 c Flowers white, corymbed. . . .7, 8 

 c Flowers rose red, panionlate....9. 10 



