14 



NORTH AMERICAN FLORA 



[VOI.UME 22 



Flowers many (more tlian 12). 

 Flowers 12 or fewer. 

 Leaves green or spotted. 

 Leaves narrow, spotted. 

 Leaves green. 



Flowers lemon -yellow. 

 Flowers reddish. 

 b. Flowers terminal, arranged in secund spikes or racemes, either 

 simple or compound. (Except no. 29.") 

 * Inflorescence mostly a simple raceme. 

 Flowers sessile. 



Bracts with a rounded spur. 

 Bracts with a retuse spur. 

 Flowers pedicelled. 

 Lower pedicels short. 

 Basal leaves acuminate. 

 Basal leaves not acuminate. 

 Lower pedicels elongated. 

 Inflorescence two-branched. 

 Inflorescence a simple raceme. 



Leaves drying thick and leathery. 

 Leaves drying thin. 



Leaves not mucronate (may be looked for here). 

 Leaves mucronate. 



Leaves bright green, not at all glaucous. 



Leaves broadly ovate to oblanceolate, thin. 

 Leaves narrowly oblanceolate, thickish. 

 Leaves grayish, glaucous. 

 Petals spreading in age. 

 Petals connivent in age. 



Leaves oblanceolate to spatulate. 



Leaves thin ; upper half of the corolla 



yellow. 

 Leaves turgid ; corolla rose-colored. 

 Leaves ovate. 



Leaves with a stout mucro. 

 Leaves with a weak mucro. 

 Leaves not turgid. 



Leaves glaucous green. 

 Leaves with reddish margins. 

 Rosettes compact ; top of leaf 



rounded. 

 Rosettes more open ; top of leaf 

 ovate. 

 Leaves very turgid. 

 Sepals spreading. 

 Sepals appressed. 

 ** Inflorescence a compound raceme. 



Flowers minute ; inflorescence narrow, elongated. 

 Flowers not minute ; inflorescence broad. 

 Leaves terete, linear. 

 Leaves flat and broad. 

 Acaulescent. 



Sepals widely spreading almost at right angles to the 

 corolla. 

 Basal leaves obovate, twice as long as wide. 



Flowers deep-crimson ; flowering stem 2-3 dm. 



long. 

 Flowers pale-rose ; flowering stem 4—10 dm. long. 

 Basal leaves oblong-oblanceolate, four times as long 

 as wide. 

 Sepals erect and closely appressed to corolla. 

 Flowers small (corolla about 10 mm, long). 

 Flowers large (corolla 15 to 20 mm. long). 



Branches many-flowered, sometimes 10-flowered. 

 Branches few-flowered, usually 3 or 4-flowered. 

 Caulescent. 



Leaves bright-green, not glaucous. 

 Leaves concave on the face. 

 Sepals ovate. 

 Sepals narrow. 

 Leaves flat on the face. 



Leaves acute, green on the margin. 



Leaves obtuse, reddish on the margin. 

 Sepals lanceolate. 

 Sepals ovate. 

 Leaves bluish-green, more or less glaucous. 

 Leaves acute. 



Leaves tapering into a long narrow stalk. 



17. E. racetnosa. 



18. E. carnicolor. 



19. E, maculata. 



20. 



21. 



E. paniculaia. 

 E. platyphylla 



22. 

 23. 



E, iemiis. 

 E. Peacockii. 



24. 

 25. 



E. strictiflora. 

 E. subsessilis. 



26. E. bifida. 



27. E. humilis. 

 50. E. obtusifolia 



28. E. Byrnesii. 



29. E. pinetorum. 



30. E. heterosepala. 



31. E. pumila. 



32. E. iurgida. 



33. E. cuspidata 



34. E. glauca. 



35 E. secunda. 



36. E. tolucensis, 



37. E. elegans. 



38. E. simulans. 



39. E. tninuHJlora 



40. E. teretifolia. 



41. E. retusa. 



42. E. rubromarginata 



43. E. Lozani. 



44. E. Schaffneri. 



45. 

 46. 



E. subrigida. 

 E. Palmeri. 



47. 

 48. 



E. Walpoleana 

 E. acutifolia. 



49. E. stolonifera. 



50. E, obtusifolia. 



51. E. scopulorum. 



52. E. Scheerii, 



