766 SCROPHULARIACEAE 



Corolla glabrous withm, less than 2 cm. long; calyx-lobes lanceolate, 4-5 mm. 



^ ^, ^ , }^^S-^ , 43. P. pumilus. 



CoroUa-tube funnelform, scarcely gibbons; sterile stamen sparingly yellow- villous above; 

 coroUa white. 44. p. albidus. 



_ . XI. Hahbouriani. 



One species. 45, p HarbouriL 



XII. COXFERTI. 



Sterile filament usually naked; leaves sharply dentate. 46. P. deustus. 



Sterile filament bearded; leaves entire or denticulate. 

 Calj-x glabrous or puberulent but not glandular. 



Corolla sulphur-yeUow. 47. p. confertus. 



Corolla purple. 



Calyx 2-3 mm. long; lobes roimded-ovate, acute, denticulate; leaves thin, the 



upper acuminate. . 48. P. Watsonii. 



f^aiyx 5-b mm. long; lobes ovate, abruptly acuminate or obtuse; leaves firm, 



not acuminate. 



Corolla more than I cm. long; upper stem-leaves broadly lanceolate, often 



rounded at the base; plants 3 dm. high or more. 

 Calyx-lobes ovate, acuminate. 49. P. Rydhergii. 



Calyx-lobes broadly obovate, obtuse or abruptly short-acuminate. 



50 P Icixus 



Corolla l^s than 1 cm. long; limb small; upper stem-leaves hnear-lanceo- 



^1 ^ . i^^G'PJ^iit seldom more than 3 dm. high. 61. P, procerus. 



Calyx and inflorescence more or loss glandular. 

 Leaves more or less denticulate. 



Upper stem-leaves broad, ovate-cordate, acuminate, clasping. 



btem pubescent; calyx-lobes not scarious. 52. P. ovatus. 



Stem glabrous or sparingly puberulent up to theinflorascence; calyx-lobes 



margined. 



Leaves firm; inflorescence rather dense; calyx-lobes narrowly scarious- 



margined. ^ 53. p, pinetorum. 



Ijeaves thm; inflorescence open; calyx-lobes not scarious-margined. 



TT ^ , . , 54. C. leptophyllus. 



Upper stem-leaves lanceolate or hnear. 



Calyx-lobas elongate-lanceolate, not scarious; flowers ascending; stem- 



,Aeaves Imear-lanceolate or linear. 62. P. gracilis. 



Calyx-lobes ovate-lanceolate, scarious-margined below and usually toothed; 



stem-leaves oblong-lanceolate or lanceolate. 

 laU. 3-5 dm. high; calyx-lobes acute. 55, P. Wilcoxii. 



lx>w, less than 3 dm. high; calyx-lobes abruptly acuminate. 



T „ ^. .. „ 60. P.tirens. 



Leaves entire or essentially so. 



Plant depressed, decumbent; stems less than 2 dm. high; basal leaves usually 



1^ t^an 3 cm. long, with rhombic-ovate or rounded -spatulate blades. 

 Corona about 1.5 cm. long; stem-leaves more or less denticulate. 

 ^ ,, ^ , 56. P. albertinus. 



Corolla 1 cm. long or less; stem-leaves entire. 57. P. brevifoJius. 



Flant not depressed. 2-7 dm. high; basal leaves more than 3 cm. long, with 



oblanceolate blades; corolla 1.5 cm. long or more. 

 Calyx-lobes ovate, broadly scarious-margined. 



Corolla sulphur-yeUow. 58. P. atienuatus. 



Corolla purplish. 



Stem-leaves ample, lanceolate or oblong. 

 Stem and leaves glabrous or nearly so. 



Leaves thick, darkemng in drjing; stem-leaves always entire; 

 inflorescence interrupted, congested. 



59. P. pseudoprocerus. 



Leaves thin, not darkening in drying; stem-leaves usually den- 

 ticulate; inflorescence not congested, a more or less contin- 

 uous panicle. 60. P. virens. 



Stem and leaves decidedly puberulent. 68. P. humilis. 

 Stem-leaves linear or linear-lanceolate, reduced; basal leaves numer- 

 ous, oblanceolate to almost Unear. 61. P. aridus. 



Calyx-lobes narrowly lanceolate, slightly scarious-margined. 



iiCaves thick and darkening in drying; inflorescence congested and 



mterrupted; corolla dark blue-purple. 

 Flant 2-3 dm. high; upper stem-leaves linear-lanceolate or oblong. 

 ^, ^ ^ ^ , 62. P. pseudohtimilis, 



i^lant 5-7 dm. high; upper stem-leaves ovate-lanceolate, less than 

 half as long as the internodes. 50. P. laxus, 



i^eaves thm. light green, not darkening in drying; inflorescence a con- 



tmuous panicle; corolla white, hght blue, or phik; leaves linear 

 or hnear-lanceolate. 

 Stem glabrous or nearly so. 



Inflorescence narrow; pedicels shoit; stem-leaves linear-lanceo- 

 ^ ^ late. 63. P. gracilis. 



Inflorescence open; pedicels long; stem-leaves narrowly Unear. 



64. P. oliganthus. 

 Stem densely puberulent. 



