280 
POLEMONIACEAE. 
9. POLEMONIUM L. Jacob’s Ladder. 
Corolla campanulate; filaments with pilose appendages at the base; inflorescence 
usually open; leaflets never verticillate. 
Low, 1-3 dm. high, cespitose; basal leaves numerous and stem-leaves few. 
Stem and leaves viscid-pubescent with long flat hairs. 
Calyx-lobes broadly lanceolate ; pedicels in anthesis shorter than the flowers. 
. 1. P. scopulinum. 
Calyx-lobes narrowly lanceolate; pedicels in anthesis usually equalling or 
exceeding the flowers. 2. P. delicatum. 
Stem and leaves viscid-puberulent; the latter often glabrate. 
3. P. parvidorum. 
Stem tall, leafy, usually solitary from the rootstock, 4-10 dm. high. 
Inflorescence narrow, dense, thyrsoid. 
Plants with a slender rootstock, not long-villous. 4. P. occidentale. 
Plants with a woody base ; stem and leaves long-villous. 
9. P. foliosissimum. 
Inflorescence open and broad. 
Corolla 2 cm. high or nearly so ; leaves glabrous. 5. P. grande. 
Corolla 8-15 mm. high; leaves pubescent. 
Stem and inflorescence long-villous, scarcely at all viscid. 
6. P. molle. 
Stem and inflorescence short-hairy; the latter at least distinctly viscid. 
Corolla over 1 cm. long; inflorescence conical or obovoid in outline; 
main peduncle usually exceeding the branches. 
Sepals oblong-lanceolate ; flowers few. 7. P. Archebaldiae. 
Sepals lanceolate ; flowers numerous. 8. P. robustum. 
Corolla less than 1 cm. long; inflorescence flat-topped ; main peduncle 
exceeded in length by the branches. 9. P. foliosissimum. 
Corolla funnelform; filaments without appendages at the base; inflorescence 
dense, spiciform ; leaflets (except in the first species) verticillate. 
Corolla purple. 
Leaflets not verticillate. 10. P. speciosum. 
Leaflets more or less verticillate. 
Corolla less than 2 cm. long, campanulate-funnelform with a rather broad 
tube. 11. P. Grayianum. 
Corolla 2-3 cm. long, funnelform with a narrow tube. 
12. P. confertum. 
Corolla yellow, ochroleucous or greenish. 
Corolla funnelform ; stamens adnate to the middle of the corolla-tube. 
13. P. mellitum. 
Corolla almost tubular; stamens almost wholly adnate to the corolla-tube. 
14. P. Brandegei. 
1. Polemonium scopulinum Greene. (P. humile pule helium A. Gray, in 
part) On mountain sides of Colo.—Alt. 8000-14,000 ft.—Lake City; head¬ 
waters of Clear Creek; Mt. Hesperus; Iron Mountain; Tennessee Pass, Lake 
Co.; Seven Lakes; Cameron Pass; Georgetown; Gray’s Peak; Silverton; 
Mt. Abram, Ouray; Alpine Tunnel; Pike’s Peak; Bob Creek; Mt. Baldy; 
Bottomless Pit; Cottonwood Lake; Red Mountain road, south of Ouray; 
Carson; near Pagosa Peak; near Ironton, San Juan Co.; Silver Plume; 
Grand Mesa, Gunnison watershed; above Graymont; Beaver Creek; Empire; 
Buffalo Pass; Eldora to Baltimore; mountains between Sunshine and Ward. 
2. Polemonium delicatum Rydb. On high mountains in Colo, and N. M. 
—Alt. 10,000-12,000 ft.—Marshall Pass (?); West Spanish Peak; Silver 
Plume; Bob Creek; Berthoud Pass. 
3. Polemonium parviflorum Nutt. (P. viscosum A. Gray, in part; not 
Nutt.) On hills from Mont, and Wash, to Colo, and Calif.—“ Colorado.” 
