GENTIAN FAMILY 663 



5. D, calycosa (Griseb.) Rydb. Stems 1-3 dm. high, ascending, erect or 

 decumbent; internodes short, about equaUing the leaves; leaves 2-3 cm. long, 

 3-5-ribbed; flowers usually sohtarv-, sessile, and subtended by the upper broad 

 leaves; cah'x-lobes ovate, foliaceous, 7-10 mm. long, obtuse; corolla dark blue, 

 or (in var. xantha A. Nels.) j-ellow, green-spotted, 3— i cm. long; lobes ovate, 

 triangular-acute at the apex; plaits •nith a lanceolate, more or less laciniate, 

 acximinate prolongation, haK as long as the coroUa-lobes or longer. G. calycosa 

 Griseb. High mountains: Wash.- — Calif. — w Wyo. Mont. — Subalp. Jl-S. 



6. D. monticola Rydb. Stem about 1 dm. high, erect; internodes usually 

 shorter than the leaves; leaves 3-ribbed; flowers soHtar\- and sessile, subtended 

 by the broad upper leaves; cah'x-tube 7-9 mm. long; lobes lance-ovate, 8-10 

 mm. long; coroUa dark blue, about 3 cm. long; lobes of the plaits lanceolate, 

 acimiinate, laciniate or toothed, half as long as the corolla-lobes or longer. High 

 moimtains: Wash. — Mont. — nw Wyo. Mont. — Subalp. Au. 



7. D. Parryi (Engelm.) Rydb. Stems erect or ascending, many-leaved, 

 1-4 dm. high; leaves from linear-lanceolate to ovate, fleshy and somewhat glau- 

 cous, 1.5-4 cm. long; flowers ]-6 at the summit of the stem; cah'x-tube 10-15 

 mm. long, white and scarious; lobes linear or lanceolate, 4—8 mm. long: corolla 

 bright blue, about 4 cm. long: lobes obovate, acute; lobes of the plaits ovate, 

 usually 2-cleft, toothed, two-thirds as long as the coroUa-lobes. G. Parryi 

 Engelm. G. bracteosa Greene. High mountains: Wvo. — Colo. — Utah. Mont. 

 —Subalp. Jl-S. 



8. D. oregana rEngehn.) Rydb. Stems erect. 3—4 dm. high, leafy: leaves 

 2— i cm. long. 3-5-ribbed, acutish or obtuse, roimded to acute at the base: flowers 

 short -pedicelled in the upper axils; cah'x-tube about 1 cm. long; lobes 5-8 mm. 

 long; coroUa purple, 3-3.5 cm. long; lobes ovate, acute; lobes of the plaits tri- 

 angular, vrith. 2 acuminate lobes. G. oregana Engehn. Meadows: Wash. — 

 Cahf.— Mont. SubmotU. Jl-S. 



9. D. afflnis (Griseb.) Rydb. Stems 1-3 dm. high, leaf.v; leaves 1.5-3 cm. 

 long; calyx-tube 5-7 nmi. long; lobes 2-10 mm. long, acute; corolla blue or 

 purple, 2..5-3 cm. long; lobes ovate, acute; lobes of the plaits ovate, 2-cleft, 

 acuminate, laciniate, two-thirds as long as the coroUa-lobe. G. affinis Griseb. 

 Mountams and hills: B.C.— (? Cahf.)— Colo.— Sask. Mont.—Subalp. Au-S. 



10. D. Forwoodii (A. Gray) Rydb. Closely related to D. afinis: stem 

 1-3 dm. high, leafy: leaves 1.5-3 cm. long, rather thick; flowers short-pediceUed 

 in the upper axils, forming a dense spike-Uke inflorescence; cah'x-tube 5-8 mm. 

 long, usually purplish; corolla blue or purple, about 3 cm. long; lobes obovate. 

 acute; lobes of the plaits 2-cleft, lanceolate, acuminate, a httle shorter than the 

 coroUa-lobes. G. Forwoodii A. Gray. HiUs and mountains : Alta. — Colo. — Ida. 

 Submont. — Mont. Jl-Au. 



11. D. Bigelovii (A. Gray) Rydb. Stem 2-3 dm. high, erect: lower leaves 

 oblong, the upper hnear or lance-linear; floral leaves and cah'x-lobes glandular- 

 ciholate; flowers short -pedicelled in the upper axils, forming a many-flowered 

 spike; cah'x-tube 5-6 mm. long; lobes hnear-subulate. 5-7 mm. long; coroUa 

 cylindro-funnelform, 2-2.5 cm. long; lobes acute: lobes of the plaits triangular, 

 2-cleft, acute, half as long as the coroUa-lobes. G. Bigelovii A. Gray. Moun- 

 tains: Colo. — N.M. — Ariz. SuhnoJit. Au-0. 



12. D. interrupta (Greene) Rydb. Stem 3-4 dm. high; lower leaves ovate 

 or oblong, 1-2 cm. long, the upper narrowly linear, 2-4 cm. long; lower flowers 

 on peduncles 1-2 cm. long; cah'x-tube .5-6 mm. long; lobes linear or subulate, 

 2. .5-4 mm. long; coroUa open-funnelform, 2.5-3 cm. long: lobes obovate; lobes 

 of the plaits 2-cleft; di^'isions lanceolate, acute, two-thirds as long as the coroUa- 

 lobes. G. interrupta Greene. Mountains: Wash. — Ore. — Colo. — Sask. Sub- 

 mont. Au— S. 



13. D. puberula (Michx.) SmaU. Stem strict, erect, .3-5 dm. high, more 

 or less scabrous, leafy; leaves lanceolate, firm, scabrous-puberulent on the mar- 

 gins and midrib, paler beneath, 3-5 cm. long; flowers subsessile, forming a dense 

 spike; calyx-tube not scarious, about 1 cm. long; lobes subulate, S-12 mm. long. 



