OENTIANACEiE. 79 



2. ERYTHRiEA, Renealm. 



Corolla-lobes li to 2.^ lines long; tube uiuch longer: anthers oblong 1, 2,8 



Corolla-lobes 3^ to G lines long: tube a little longer; anthers linear 4» 5 



1. E, floribunda, Benth. Peilicels short or none: corolla-lobes 2 lines long or less. 



MuhJenbergii, Gristb. Pedicels short or 2-bracted; corolla-lobes obtuse. 



Douglasii, Gr. Pedicels slender: corolla-lobes obtuse: seeds globular. 



trich.anth.a, Griseb. Flowers often corymbose, some sessile, lobes acute. 



venusta, Gr. Flowers pediceled : corolla-lobes obtuse, tube yellowiah. 



3. GENTIANA, Tournefort. 



a. Corolla without plaited folds or appendages between the lobes. 



Flowers solitary on terminal peduncle, 12 to 1 S lines long 1, 9 



Flowers several, smaller, 5 to 7 lines long: calyx 5-cleft 3 



6. Corolla with folds between the (usually 5) lobes which are prolonged into thin teeth or 

 accessory lobes; stigmas distinct: pod on a stijje. 



Annual: anthers introrse: stem leaves ovate-cordate 2 to 4 lines long 4 



Perennial: anthers more or less extrorse: usually a pair of bracts or leaves under the short- 

 peduncled or sessile flower. 

 Stems several from one caudex, 1-2-flowered: stem-leaves connate-sheathing. 



Stems 1 -flowered, 2 to 4 inches high: radical leaves rosulate 5 



Stems longer: upper pair of leaves enclosing the flower 0, 7 



Stems many-leaved: style manifest, corolla blue or bluish. 



Corolla-lobes broad, narrowed at base; accessory lobes entire 8, 9 



Corolla-lobes not narrowed at base: accessory lobes laciniate 10, IX 



1. O. Berrata, Gunner, yar. holopetala, Gr. Calyx angular, lobes keeled. 



2. G. simplex, Gr. Leaves linear-oblong, 3 to 9 lines long: calyx hardly angular. 



3. O. Amarella, Li. var. acuta, Engelm. Stem acute-angled: capsule sessile. 



4. G. Douglasiana, Bong. Cymosely branched: radical leaves rosulate. 



6. G. Newberryi, Gr. Radical leaves obovate to spatulate: corrolla 18 lines long. 



6. G. setig-era, Gr. Stems decumbent: 1 or 3 bristles between corolla-lobes. 



7. G. calycosa, Griseb. Stems erect: accessory corolla-tubes laciniate or 2-clefi. 



8. G. Menziesii, Griseb. Stems slender, a ft. long or less: leaves 1^ in. long or 1m» 



9. G. sceptrum, Griseb. Stem 2 to 4 ft. high: leaves broader, 1^ to 3 in. long. 



10. G. Oregana, Engelm. Corolla over an inch long, lobes roundish. 



1 1. G. afinis, Griseb, Corolla an inch long or less, lobes ovate, acute. 



4. FRASERA. Walter. 

 Stout, 2 to 5 ft. high : leaves not white margined 1, 9 



Gray-green, 1 to 3 ft. high: leaves with cartilaginous white margins. 3, 4, 6 



1. F. thyrsiilora, Uook. Leaves in 2*8 or 3's: a gland on each oorolla-lobe. 



