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. unilatcralis. 



Plant densely puberulent. 21. P. Wardii. 



Sterile filament strongly bearded. 22. P. perpulcher. 



IV. PALMERIANT. 



One. species. 23. P. Palmeri. 



V. GRAXDIFLORI. 



One species. 24. P. grandifiorus. 



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; sepais 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-margiaed. 



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. secundiflorus. 

 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 



purphsh. 

 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. Enanthera. 



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



dentate. 39. P. salicns. 



Stem merely puberulent. 



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

 Corolla 2-2.5 cm. long. fO. P. C leburnei. 



Corolla 15-18 cm. long. 

 Basal leaf-blades Linear to Linear-oblanceolate, usually narrower than the uppe 



cauhne leaves. 



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



42. P. Jamesn. 



