OiiDKii 05.— THE GENTIANWOKTS. 271 



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 witli folded appendages between the 5 lobes. Anthers cohering b 



t^oroiia with no appendages between the lobes. Anthers separate a 



a begnietits ot ino corolla entire, pale-blue, 5 in number....! 



a Segments or me corolla fringed, mostly but 4, bright blue 2, 3 



Jtf lowers soliliiry, terminal, blue or white 4 



? «''owe'-$ CL^stered, yellowish or cream-white. . . .5, 6 

 ' }<^;AWf>rs claslercd, blue.... 7-9 

 " Gr. quinqueflo'ra. Five-leaved G. Clusters about 5-flowered. Corolla lobes bristle- 

 IDcmt.eri. 

 2 3-. criai'ta. Fringed G. Leaves lanceolate. Corolla conspicuously fringed. 



Height If. 

 8 Gr. det'onsa. Shorn G. Lvs. linear. Corolla lobes crenatc-ciliate. Height If. 

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



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



greenish-white, 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. 



7 G-. Andrew'sii. Cloml Blue G. Leaves ovate lanceolate, 3-veinecl. Corolla never 



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



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



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



9 G^. puber'ala. Rough G. Tlant scabrous. Lvs. lance-ovate, very rough at edge. 



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



2. SABBA'TIx\. American Centaury. 



Calyx 5-12-parted. Corolla rotate, limb 5-12-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 (rarely 6)-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 Flowei-3 rose-red, with a central star o, 



c Flowers white, corymbed 7, 8 



c Flowers rose-rod, paniouiato 9, 10 



