FIGWORT FAMILY 765 



Leaves shorter than the internodes; anthers opening at the distal end. 



16. P. cyananthus. 

 Leaves longer than the internodes; anthers opening their whole length. 



14. P. cyanocaulis. 

 Calyx-lobes with very broad scarious margins, forming basal auricles; 



anther-sacs opening their whole length. 17. P. Brandegei. 



Calyx-lobes orbicular or broadly ovate, abruptly short-acuminate, very scarious 



and erose. 18. P. glaber. 



Anthers perfectly glabrous. 



Sterile filament glabrous or nearly so. 

 Plant glabrate. 



Calyx-lobes obovate or ovate, abruptly acuminate, decidedly scarious- 



margined. 19. P. speciosus. 



Calyx-lobes acute or obtuse, scarcely scarious-margined. 



20. P. unilateralis. 



Plant densely puberulent. 21. P. Wardii. 



Sterile filament strongly bearded. 22. P. perpulcher. 



IV. PALMERIANI. 



One species. 23. P. P aimer i. 



V. GRANDIFLORI. 



One species. 24. P. grandiflorus. 



VI. HALLIANI. 

 One species. 25. P. Hallii. 



VII. ACUMINATI. 



Inflorescence interrupted; bracts except the lowermost shorter than the flowers; basal 



leaves spatulate or oblanceolate. 

 Stamens exserted; bracts rounded-cordate, abruptly short-acuminate; sepals ovate, 



scarious-margined. 26. P. cyathophorus. 



Stamens included. 



Bracts ovate or cordate. 



Calyx-lobes ovate, with scarious toothed margins, abruptly acuminate; bracts 



ovate, acute. 27. P. pachyphyllus. 



Calyx-lobes narrowly lanceolate, not scarious-margined. 



Corolla-limb 15-18 mm. broad, glabrous within; tongue of the sterile fila- 

 ment strongly incurved, short yellow-bearded at the apex. 



28. P. acuminatus. 



Corolla-limb about 1 cm. broad, usually slightly bearded within; tongue of 

 the sterile filament less strongly incurved, yellow-bearded its whole 

 length. 29. P. nitidus. 



Bracts lanceolate to linear-lanceolate. 



Stem-leaves except the uppermost obtuse, oblong or oblanceolate, tapering 



into a winged petiole. 30. P. arenicola. 



Stem-leaves acute, sessile or the lowermost petioled, but the petiole not winged. 

 Calyx-lobes broadly obovate, scarious, erose, abruptly contracted into a 



very short acumination. 48. P. Watsonii. 



Calyx-lobes ovate or lanceolate, acute or gradually acuminate. 



Calyx-lobes lanceolate; plant 2.5-4 dm. high. 31. P. secundiftorus. 

 Calyx-lobes ovate, decidedly scarious-margined; plant 2 dm. or less 



high. 32. P. Fendleri. 



Inflorescence dense; bracts large, long-acuminate, most of them exceeding the flowers; 



basal leaves linear or nearly so, narrower than the stem-leaves. 

 Bracts broadly lanceolate, or the upper ovate. 



Bracts strongly veined; corolla 2.5-3 cm. long, ventricose; basal leaves linear. 



33. P. Haydenii. 

 Bracts not strongly veined; corolla about 2 cm. long, scarcely ventricose; basal 



leaves linear-oblanceolate. 34. P. caudatus. 



Bracts narrow, linear-lanceolate, not strongly veined. 35. P. angustifolius. 



VIII. PETIOLATI. 



One species. 36. P. petiolotus. 



IX. WIPPLEANI. 



One species. 37. P. stenosepalus. 



X. CRISTATI. 

 Corolla-tube decidedly gibbous-ventricose; sterile stamen densely yellow-villous ; corolla 



purplish. 

 Stem viscid-villous as well as puberulent, especially the upper part. 



Inflorescence densely glandular- villous ; corolla 2.5-3.5 cm. long; leaves entire or 



slightly denticulate. 38. P. Erianthera. 



Inflorescence sparingly glandular-villous ; corolla 2-2.5 cm. long; leaves sharply 



dentate. 39. P. saliens. 



Stem merely puberulent. 



Basal leaf-blades obovate, spatulate, or ovate, broader than the cauline leaves. 

 Corolla 2-2.5 cm. long. 40. P. Cleburnei. 



Corolla 15-18 cm. long. 41. P. Moffattu. 



Basal leaf-blades linear to linear-oblanceolate, usually narrower than the upper 



cauline leaves. 



Corolla over 2 cm. long; calyx-lobes linear-lanceolate, about 8 mm. long. 



42. P. Jamesii. 



