BORAGE FAMILY 723 



mm. long, rounded and muricate on the back, not at all cross-ridged. 0. affinis 

 perennis A. Nels. Dry hills: N.D. Colo. Ida. Submont. Je-Jl. 



19. O. argentea Rydb. Cespitose perennial; stems 3-4 dm. high, hispid; 

 basal leaves spatulate or oblanceolate, obtuse, 5-6 cm. long, densely white or 

 yellowish pubescent; stem-leaves oblanceolate, with the bristles more spreading; 

 corolla white, less than 5 mm. long; nutlets about 3.5 mm. long, papillose and 

 with more or less distinct cross-ridges. Hills: Colo. Utah. Son. Je. 



20. O. cana A. Nels. Stem 1 dm. high or less, silvery-strigose; leaves 1-3 

 cm. long; corolla about 4 mm. long and 3 mm. wide; nutlets broadly ovate, 2 mm. 

 long. Krynitzkia sericea Nutt. ; A. Gray, in part. Dry hills: w Neb. Submont. 

 Je-Au. 



21. O. nana Eastw. Densely cespitose perennial; stems 5-10 cm. high, 

 hispid; basal leaves crowded on the caudex, densely white-strigose, oblanceolate, 

 1-2 cm. long; corolla white, 6-7 mm. long; nutlets 1 or 2, ovate, muriculate and 

 somewhat rugose. Mesas: Colo. Son. My. 



22. O. echinoides (M. E. Jones) F. Macbr. Cespitose perennial; stems 

 about 1.5 dm. high, fulvous-hispid; basal leaves spatulate, 4-5 cm. long, densely 

 canescent and strigose; stem-leaves narrowly oblanceolate; corolla nearly 1 cm. 

 long, 5-6 mm. wide; nutlets sharply angled, muricate-papillose and short-setose 

 on the sides. Eritrichum glomeratum humile A. Gray. Krynitzkia echinoides M. 

 E. Jones. 0. humile Greene. 0. hispida Nels. & Kenn. Dry hills: Utah 

 Calif. Submont. Ap-Je. 



23. O. sericea (A. Gray) Greene. Cespitose perennial; stem 1-2.5 dm. 

 high, hirsute above with yellow hairs; basal leaves spatulate, 3-5 cm. long, with 

 long petioles, silky canescent; stem-leaves linear or linear-oblanceolate ; corolla 

 7-8 mm. long; nutlets ovate, ridged on the back, rugose. 0. humilis Greene. 

 K. sericea A. Gray. Dry arid hills: Utah w Wyo. Mont. My-Jl. 



24. O. depressa (M. E. Jones) F. Macbr. Densely cespitose perennial; basal 

 leaves many, tomentose and strigose, spatulate, 2-5 cm. long; petioles long-hairy; 

 spike barely surpassing the leaves; calyx about 4 mm. long, densely pubescent; 

 lobes triangular; corolla 4 mm. long and as broad, white; nutlets deltoid-ovate, 

 with sharp edges, closely tuberculate on the back. K. depressa M. E. Jones. Dry 

 slopes: Nev. Utah. Submont. Mont. Je. 



25. O. caespitosa A. Nels. Densely cespitose perennial; stems 5-10 cm. 

 high, numerous, densely hirsute below; basal leaves crowded, very numerous, 

 spatulate or oblanceolate, 1-3 cm. long, densely silky-canescent or sometimes 

 yellowish; corolla white, 4-5 mm. long; nutlets narrowly ovate. Dry arid hills: 

 Wyo. Submont. My-Je. 



26. O. Shantzii Tidestr. Cespitose perennial; stems about 1 dm. high, 

 strigose and white-hispid; leaves linear-spatulate, 2 cm. long, 4 mm. broad, 

 densely strigose; calyx densely hirsute; lobes 4 mm. long; corolla-tube slightly 

 longer than the calyx; nutlets elongate-ovate, obtuse, white-punctate on the 

 back. Dry saline soil: Utah. Son. Je-Au. 



27. O. dolosa F. Macbr. Cespitose perennial; stem 7-10 cm. high, strigose 

 and softly hirsute; basal leaves about 3 cm. long and 4 mm. wide, canescent and 

 strigose-hispid; inflorescence spike-like, 3-5 cm. long; calyx hispid; lobes in fruit 

 6 mm. long; corolla 5 mm. long, not exserted; nutlets ovate, 3 mm. long, densely 

 muricate. Bench lands: Utah. Son. My-Je. 



28. O. commixta F. Macbr. Stem 1.5-2 dm. high, strigillose and softly 

 hirsute; basal leaves spatulate, 4-5 cm. long, 5-8 mm. wide, appressed strigillose 

 and hispid; stem-leaves few, oblanceolate; inflorescence 1-1.5 dm. long, yellow- 

 ish hispid; corolla 5 mm. long; tube not exserted; nutlets ovate, about 3 mm. 

 long; tube not exserted; nutlets ovate, about 3 mm. long, densely muricate. 

 Sandy slides and stony benches: Utah Nev. Je-Jl. 



29. O. salmonensis Nels. & Macbr. Stem 1.5-2 dm. high, white-hispid 

 and finely strigose; stem-leaves 3-8 cm. long, oblanceolate or spatulate, hispid- 

 ciliate, canescent and pustulate-hispid; inflorescence thyrsoid-glomerate, dense; 



