724 BORAGINACEAE 



calyx-lobes linear-lanceolate, 5-7 mm. long in fruit; corolla white; tube shorter 

 than the calyx; nutlet 3 mm. long, ovate, acutely margined, gray, with a lighter 

 indistinct keel. Loose soil: Ida. Plain. Je. 



30. O. paradoxa A. Nels. Stems 8-15 dm. high, decumbent at the base, 

 hirsute; leaves spatulate-oblanceolate, 1.5-3 cm. long, hispid-strigose ; inflores- 

 cence subcapitate at first; calyx-lobes linear-lanceolate, 4-5 mm. long; corolla- 

 tube nearly three times as long as the calyx; nutlets ovoid, transversely rugose 

 and muricate. 0. gypsophila Payson. Gypsum hills: w Colo. Submont. Je. 



31. O. eulophus Rydb. Stem about 2 dm. high, hispid with yellowish 

 hairs; basal leaves numerous, spatulate, 4-5 cm. long, finely cinereous and ap- 

 pressed-hispid; stem-leaves oblanceolate, often yellowish; corolla white, 10-12 

 mm. long; limb about 5 mm. wide; nutlets 4-5 mm. long. Gravelly hills: Colo. 

 Utah. Submont. Je-Jl. 



32. O. longiflora A. Nels. Stem 1-2 dm. high, hispid; basal leaves crowded, 

 spatulate, 3-7 cm. long, cinereous-strigose and more or less hispid; stem-leaves 

 few, linear; inflorescence thyrsoid, yellowish hispid; corolla 7-8 mm. wide; nut- 

 lets ovate, 3-4 mm. long, acutely margined, obscurely transversely rugose on the 

 back and papillose towards the margins. Table-lands and plains: Colo. Utah. 

 Son. Submont. My-Je. 



33. O. Wetherillii Eastw. Biennial, with a taproot; stems 1-3 dm. high, 

 hirsute; leaves mostly basal, spatulate, 1-3 cm. long; inflorescence of numerous 

 unilateral or distichous spikes; corolla 8-9 mm. wide; nutlets ovate-oblong, 3-5 

 mm. long, acute-margined, densely and irregularly rugose on the back. Canons: 

 Utah. Son. My. 



34. O. cristata Eastw. Stems slender, about 2 dm. high, pubescent and 

 hispid; leaves oblanceolate, 1.5-5 cm. long, cinereous-strigose and hispid; in- 

 florescence grayish or tawny hispid; calyx-lobes lanceolate, 6 mm. long; corolla- 

 limb 7 mm. broad; nutlets ovate, acute-margined, transversely rugose and 

 papillose. Arid hills: w Colo. N.M. Submont. My. 



35. O. tenuis Eastw. Stem branched at the base, 1-2 dm. high, brown, 

 strigose and hispid; leaves oblanceolate or linear-spatulate, 1-3 cm. long, acute, 

 strigose on both sides, and hispid beneath and on the margins; calyx-lobes in 

 fruit 6 mm. long, linear, white-hispid; corolla white, about 1 cm. long; limb 8 

 mm. wide; nutlets ovate, 3 mm. long, acute-margined, keeled and corrugated- 

 rugose on the back. Canons: Utah. Son. My. 



36. O. fulvocanescens (A. Gray) Greene. Stems 5-15 cm. high, densely 

 silyery-strigose; basal leaves linear-spatulate or oblanceolate, 2-3 cm. long, 

 thick, densely silyery-canescent, sometimes yellowish; stem-leaves yellow and 

 more or less hispid; inflorescence narrow, yellow-hispid; corolla white, about 1 

 cm. long; limb 6-7 mm. wide; nutlets broadly ovate. K . fulvocanescens A. Gray. 

 Hills: Wyo. N.M. Submont. My-Au. 



37. O. nitida Greene. Stem cinereous-strigose; basal leaves numerous, 

 broadly oblanceolate, silvery silky-strigose; inflorescence an open thyrsus, yellow- 

 ish hispid; corolla white, about 15 mm. long; limb 6 mm. wide; nutlets mostly 

 solitary, finely muriculate. Dry hills and stony ground: Colo. Utah. Son. 

 Submont. My-Je. 



38. O. flavoculata A. Nels. Stems 1-2 dm. high, strigose and hispid-ciliate; 

 basal leaves numerous, spatulate or oblanceolate, canescent-strigose and some- 

 what hirsute; inflorescence narrow, yellowish hispid; corolla 12-15 mm. long; 

 limb 7-8 mm. wide; nutlets ovate. Dry hills: Wyo. w Colo. Utah. Sub- 

 mont. My-Je. 



39. O. flava A. Nels. Stems 1-3 dm. high, white-strigose below, yellowish 

 hirsute above; leaves numerous, linear or linear-oblanceolate, silky-strigose, 1-5 

 cm. long; inflorescence narrow, yellow-hispid; corolla yellow, about 15 mm. long; 

 limb 7-8 mm. wide; nutlets broadly ovate, obtuse. 0. lutescens Greene. Hills: 

 Wyo. N.M. Ariz. Submont. My-Jl. 



40. O. leucophaea (Dougl.) Greene. Stems 2-5 dm. high, silky-strigose; 

 leaves silky-strigose and silvery, linear or linear-lanceolate, 5-10 cm. long; 



