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GENTIANACE^. 79 



2. ERYTHR^A, Renealm. 



Corolla-lobes IJ to 2^ lines long; tube much longer: anthers oblong 1, 2, 3 



Corolla-lobes 3.^ to 6 lines long: tube a little longer; anthers linear 4, 5 



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



2. E. MuMenbergii, Griseb. Pedicels short or 2-brac ted; corolla-lobes obtuse. 



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



4. E. tricb.antlia, Griseb. Flowers often corymbose, some sessile, lobes acute. 



5. E. venusta, Gr. Flow ers pediceled : corolla-lobes obtuse, tube yellowish. 



3. GENTIANA, Toumefort. 



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



Flowers solitary on terminal peduncle, 12 to 18 lines long 1, 2 



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



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

 accessory lobes; stigmas distinct: pod on a stipe. 



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



Perennial: anthers more or less extrorse: usually a pair yf 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 6 



Stems longer: upper pair of leaves enclosing the flower 6, 7 



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



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



Corolla-lobes not narrowed at base: accessory lobes laciniate 10, 11 



1. O. serrata. Gunner, var. holopetala, Gr. Calyx angular, lobes keeled. 



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



3. Q. Amarella, L. var. acuta, Eugelm. Stem acute-angled: capsule sessile. 



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



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



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



7. G, cd.lycosa, Griseb. Stems erect: accessory corolla-tubes laciniate or 2-cleft. 



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



9. G. Bceptrum, 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. afflnis, Griseb, Corolla au inch long or less, lobes ovate, acute. 



4. FBASERA. Walter. 



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



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



1. F. th3n:siflora, llook. Leaves in 2'8 or S's: a gland on each corolla- lobe. 



