308 



NORTH AMERICAN FLORA 



[Volume 25 



Upper leaves not reduced, 17-36 mm. long. 

 Stems sparsely spreading-pubescent. glabrate. 

 Upper leaves ovate to elliptic-oblong. 

 Wings 6-6.5 mm. long. 

 Wings 4—5 mm. long. 



Scarious border of aril barely as deep as height of 



umbo; keel purplish. 

 Scarious border of aril distinctly deeper than 

 height of umbo; keel yellowish-green. 

 Capsule pubescent on sides at maturity, or if merely ciliate, 

 then aril veil-like. 

 Hairs of stem (at least in part) wide-spreading. 



Hairs of stem all short and wide-spreading; leaves 



not reticulate. 

 Hairs of stem partly long and spreading, partly short 

 and incurved. 

 Middle and upper leaves linear or linear-lanceo- 

 late, 1 .8 — 4- mm. wide. 

 Middle and upper leaves oblong-lanceolate or 

 oval, 4.5-16 mm. wide. 

 Hairs of stem all incurved or appressed. 



Aril veil-like, with broad scarious lobulate margin, 

 covering one-third to three-fifths of seed, the 

 dorsal margin vertically descending, the lower 

 margin nearly or quite horizontal. 

 Sepals and wings quickly deciduous. 

 Sepals and wings subpersistent. 

 Aril not veil-like. 



Upper leaves ovate to elliptic or lance-oblong. 

 Lobes of aril oblong to deltoid; wings 5-5.8 

 mm. long. 

 Leaves oval or elliptic-oblong, 3-9 mm. 



long; stems procumbent. 

 Leaves* ovate to elliptic, 1-4 cm. long; 

 stems erect. 

 Leaves ovate or elliptic-ovate, obtuse 

 or rounded; wings oval, 4—4.6 mm. 

 wide. 

 Leaves elliptic or lance-elliptic, acute 

 to acuminate; wings elliptic, 2.5-3.2 

 mm. wide. 

 Lobes of aril linear or lance-linear; wings 3.5- 

 5 mm. long. 

 Upper leaves linear. 



Leaves 2.5-3 mm. wide; wings ciliate. 

 Leaves 3-17 mm. wide; wings glabrous. 



IV. Hebantha 

 Capsule merely ciliate at maturity. 

 Flowers 5.5-7 mm. long. 



Leaves subgriseous-velutinous. 

 Leaves not at all velutinous. 



Hairs of stem all incurved or appressed. 

 Stem subterete; wings 5.5-6.6 mm. long. 



Stem and leaves sparsely strigillose; leaves narrowly 



lanceolate. 

 Stem and leaves densely strigillose or incurved- 

 puberulous; leaves ovate to rhombic-lanceolate. 

 Stem strongly angled; wings 4.5-5 mm. long. 

 Hairs of stem (at least in part) wide-spreading. 

 Leaves lanceolate; wings ciliate. 

 Leaves ovate; wings not ciliate. 

 Flowers 9 mm. long. 

 Capsule pubescent on sides at maturity. 



Wings orbicular-oval or broadly oval, less, usually much less, than 

 twice as long as wide. 

 Keel 3.2-3.5 mm. long; wings 3.8 mm. long. 

 Keel 4.2-6.8 mm. long ; wings 4.5-8.3 mm. long. 



Wings rather densely pubescent over whole outer surface. 

 Sepals 4-4.5 mm. long; capsule reticulate. 

 Sepals 2.5-3 mm. long; capsule scarcely reticulate. 

 Wings sparsely pubescent or puberulous chiefly at apex and 

 base and along costa, or subglabrous. 

 Wings 6.5-9 mm. long. 



Aril not distinctly 3-lobed. 



Capsule spreading-pilosulous; aril with minute 



umbo. . 

 Capsule incurved-puberulous; umbo medium- 

 sized. 



30. P. longa. 



31. P. neurocarpa. 



32. P. o'ophylla. 



33. P. brachyanlhema. 



34. P. Brandegeeana. 



35. P. orlhotriclta. 



36. P. relifolia. 



37. P. ampholhrix. 



38. P. obscura. 



39. P. Lozani. 



40. P. parrasana. 



41. P. anneclens. 



42. P. Rtissellianc 



43. P. com pacta. 



44. P. 



45. P. polymorpha. 



46. P. Sanciae-Luciae. 



47. P. longipes. 



48. P. tielala. 



49. P. polyedra. 



50. P. Galeotlii. 



51. P. rivinaefolia. 



52. P. Seleri. 



53. P. brachylropis. 



54. P. americana. 



55. P. pedicellata. 



56. P. cuspidulata. 



57. P. appressipilis. 



