GENTIAN FAMILY 661 



or the uppermost acute; flowers 1-3 in each axil; calyx-lobes linear, slightly 

 unequal, 3-7 mm. long; corolla blue or bluish, 10-15 mm. long; lobes acute or 

 obtuee; setae of crown numerous. Gentiana plebeia Cham. Mountains : Alaska 

 —(? CaUf.)— Colo.— Sask.— Mack.; e Asia. Mont.—Subalp, Jl-Au. 



7. A. tortuosa (M. E. Jones) Rydb. Low annual, with spreading branches, 

 about 1 dm, high or less; leaves all linear or linear-lanceolate, 1-3 cm. long; 

 flowers nimierous, fascicled in the axils; calyx-Iobcs subequal, about 6 mm. long; 

 corolla yellowish, 8-10 mm. long; crown in the throat well developed. Gentiana 

 tortuosa M. E. Jones. In meadows: South-central Utah. Mont. S. 



8. A. ventorum Rydb. Low annual or biennial, branched near the base; 

 stems 5-10 cm. long, branched; basal leaves oblanceolate; stem-leaves linear or 

 Unear-lanceolate, about 2 cm. long; flowers 1-3 in the axils; calyx-lobes linear- 

 lanceolate, 3-5 mm. long, acute, scabrous on the margins; corolla about 5 mm. 

 long; lobes ovate, obtuse or acute. Mountains; Wind River Mountains, \Ayo. 



Au. 



9. A. propinqua (Richards.) Greene. Annual, often branched near the 

 base; stems 0.5-3 dm. high, often purplish; basal leaves spatulate or oblanceolate, 

 1-2 cm. long; stem-leaves lanceolate, 1-2 cm. long, acute; flowers 1-3 in the 

 axils, on naked pedicels; calyx-lobes very unequal, the two outer ovate or ob ong, 

 acute, 5-7 mm. long, the rest linear, 3-5 mm. long; corolla blue, 10-17 mm. long. 

 G. propinqua Richards. Moist slopes and glades: Alaska— B.C.— Alta.— Mack.; 

 6 Asia. Subalp. — Alp. Jl~Au. 



10. A. arctophila (Griseb) Greene. Low annual, branching at the base; 

 branches 2-10 cm. high, deciunbent; basal leaves spatulate or obovate, about 1 

 cm. long; stem-leaves 1 cm, or less long, acute; flowers 1-2 m the axils; calyx- 

 lobes ovate, 5-8 mm. long; corolla 15-18 mm. long. G. arctophila Griseb. Arctic 

 coast: Alta. — B.C. Alp, Au-S. 



5. CHONDROPHYLLA A. Nels. Moss Gentian. 



Small annuals or biennials. Leaves numerous, small, opposite, imbricate, 

 with white scarious or cartilaginous margins. Flowers sohtary and terminal. 

 Calyx narrow, 4- or 5-lobed. Corolla salverform, plicate, with broad emarginate 

 plaits in the sinuses. Ovary 1-celled. Anthers versatile. Capsule more or 

 less stipitate. Seeds oblong, with close coat. 



Leaves and calyx-lobes with broad scarious margins ; capsule long-stipitate at last exserted 

 from the corolla ^' remonin. 



Leaves and calyx-lobes slightly scarious-margined ; capsule short-stipitate, not ex.serted. 



1 C. Fremontii (Torr.) A. Ncls. Low biennial, branched at the base, 

 l-lOcm" high; leaves glaucous and with broad white margins, the basal ones or- 

 bicular or obovate or ovate, about 5 mm. long; stem-leaves oblong to hnear- 

 lanceolate, acute, appressed, 3-5 mm. long; calyx-tube 5-7 mm. long; corolla 

 10-15 mm long, light greenish purple. Gentiana humilis A. Uray, not btev. 

 Grassy banks in the mountains: Wyo.— Colo.— Alta. Subalp— Alp. Je-Jl. 



2 C. americana (Engehn.) A. Nels. Low biennial, branched at the base, 

 l-12'cm high- leaves green, slightly if at all white-margined; basal ones orbicular 

 or obovate 2-5 mm. long; stem-leaves ovate, about 5 mm. long, scarcely ap- 

 pressed; calyx-tube 5-8 mm. long; corolla 10-20 mm. long, azure-blue; lobes ovate. 

 Gentiana prostrata americana Engehn. Alpme-arctic regions: Alaska— Colo.— 

 Alta. Subalp,— Alp. Je-Au. 



6. DASYSTEPHANA Adans. Gextian. 



Mostly perennial, rarely annual, caulescent herbs. Leaves opposite, entire 

 or merely erose-ciliolate. Flowers perfect, c>Tnose, sessile or nearly so, rarely 

 solitary and pedicelled. Calj-x with a membrane inside the calyx-lobes, which 

 varv from obsolete to fohaceous. Corolla salverform, funnelform, or clavate, 

 without glands and cro^N-ns, but with cleft plaits between the convolute lobes. 

 Stamens with converging or cohering anthers. Ovary 1-ceUed; ovules numerous. 

 Capsule stipitate. 



