722 BORAGINACEAE 



margins sharp, almost winged. K. virgata A. Gray. Dry hills and mountains: 

 Colo. Wyo. Submont. Mont. My-Jl. 



7. O. spicata Rydb. Stem solitary and simple, virgate, hispid throughout; 

 basal leaves numerous, spatulate, 2-5 cm. long, hispid on both sides; stem-leaves 

 linear-oblanceolate or linear, 4-9 cm. long; corolla 6 mm. long, 4 mm. broad; nut- 

 lets 4 mm. long, ovate in outline, scarcely keeled on the back, white and shining, 

 the margins merely acute. Hills: Colo. Submont. Jl-Au. 



8. O. setosissima (A. Gray) Greene. Biennial or perennial, with a taproot; 

 stem 6-8 dm. high, very hispid; basal leaves oblanceolate or linear-oblanceolate, 

 1-2 dm. long, hirsute; corolla about 5 mm. long, 4 mm. wide; nutlets nearly 6 

 mm. long, broadly ovate, dull, scabrous-muricate on the back, distinctly winged. 

 Dry hills: Utah Ariz. Son. Je-Au. 



9. O. elata Eastw. Stems 3-4 dm. high, virgate, white-strigose and some- 

 what hirsute; basal leaves clustered, spatulate, 2-3 cm. long, densely white- 

 strigose; upper stem-leaves linear, more hirsute; inflorescence with very short 

 branches; corolla white, 6-7 mm. long; nutlets ovate, acutely margined. Dry 

 clay-hills: w Colo. Submont. My-Je. 



10. O. Bakeri Greene. Stem 1-2 dm. high, hirsute; leaves oblanceolate, 

 strigose-hispid; inflorescence with few short branches; calyx hispid; corolla white, 

 4-5 mm. long; nutlets ovate. Sage plains: s Colo. Je-Jl. 



11. O. virginensis (M. E. Jones) F. Macbr. Stem 2-3 dm. high, hirsute; 

 basal leaves oblanceolate, 6-10 cm. long, canescent and hispid; inflorescence 

 rather open-paniculate, 1-2 dm. long, yellowish hispid; corolla white, 4 mm. long; 

 nutlets broadly ovate, narrowly winged and strongly ridged. K. glomerata 

 viginensis M. E. Jones. Hillsides: s Utah. Son. My-Je. 



12. O. thyrsiflora Greene. Stem branched above, very hispid, 2-4 dm. 

 high; basal leaves numerous, spatulate or oblanceolate, very hispid, 4-10 cm. long; 

 inflorescence 1-2 dm. long, 5-8 cm. wide, often yellowish hispid; corolla about 5 

 mm. long, 3 mm. wide; nutlets 3 mm. long. 0. hispidissima (Torr.) Rydb. 

 Hillsides and river valleys : Neb. N.M. Utah. Plain Mont. Je-Au. 



13. O. aperta Eastw. Stem 1-2 dm. high, branching, hirsute; basal leaves 

 spatulate or oblanceolate, 2-4 cm. long, strigose as well as hirsute; stem-leaves 

 oblanceolate; inflorescence a closely branched thyrsus; corolla white, 6 mm. long; 

 nutlets 2.5 mm. long. Dry hills: Colo. -Mont. Submont. Je-S. 



14. O. Macounii Eastw. Biennial or perennial, with a slender taproot; 

 stem sparingly hirsute; leaves sparingly hirsute; corolla white, 5 mm. long, 4 mm. 

 wide; nutlets ovate, obtuse, 2 mm. long, acutely margined, rounded on the back 

 and coarsely muricate. Plains: Sask. Plain. Jl. 



15. O. glomerata (Pursh.) Greene. Perennial or biennial; stem erect, 1-3 

 dm. high; basal leaf -blades 2-6 cm.; stem-leaves oblanceolate; corolla white, 7-8 

 mm. long, 7-10 mm. wide; nutlets ovate, 3 mm. long, acute-margined, obtuse, 

 transversely rugose and muricate on the back. K. glomerata A. Gray. Dry 

 hills: Sask. Neb. (? Colo.) Utah. B.C. Plain Submont. My-Jl. 



16. O. affinis Greene. Biennial; stems 2-4 dm. high, hispid; leaves oblance- 

 olate, somewhat grayish strigose and hirsute, 3-10 cm. long; stem-leaves linear 

 or linear-oblanceolate, greener and more hirsute; corolla 7-9 mm. long, 7-10 mm. 

 wide; nutlets ovate, rounded on the back, coarsely tuberculate on the back 

 (rarely somewhat rugose), finely so towards the margin. Krynitzkia pustulata 

 Blankinship. Dry hills: S.D. Colo. Ida. Mont. Plain Submont. Je-Jl. 



17. O. spiculifera Piper. Perennial, with a tufted caudex; stem erect, 2-3 

 dm. high, finely strigose and hispid; basal leaves spatulate-oblanceolate, densely 

 strigose and sparingly hispid; blades 1.5-2 cm. long; inflorescence of 8-12 false 

 racemes; corolla white; tube 5 mm. long; limb 8 mm. broad; nutlets ovate, obtuse, 

 3 mm. long, the back bluntly tuberculate. 0. ciliohirsuta Nels. & Macbr. Hills: 

 Wash. Ida. Submont. Je. 



18. O. perennis (A. Nels.) Rydb. Perennial, with a taproot; stem hispid; 

 basal leaves grayish strigose and hirsute; corolla 5-7 mm. long; nutlets about 3 



