(172) 
** Mexican and Central American species. 
Cymes straight or curved, little branched or not at all. SCORPIOIDES. 
Cymes straight; leaves gradually narrowed to an obtuse base 
49. V, brachiata. 
Cymes curved ; leaves abruptly narrowed at the base. 
50. V. scorpioides. 
Cymes flexuous, freely branched and approaching a panicle in appearance. 
DEPPEANAE. 
N 
Heads 11-flowered. 51. V. Aschenborniana. 
Heads 18-21-flowered. 
Leaves tomentose or floccose beneath, 52. V. Deppeana. 
Leaves pubescent or strigose beneath. 
appus tawny. 53. V. patens. 
Pappus white. 54. V. canescens. 
V. PANICULATAE DICHOTOMAE 
One species. 55. V. menthaefolta. 
VI. PANICULATAE UMBELLIFORMES 
Involucre 6 mm. high or more. 
ads 18-2:-flowered. 
Scales all subulate 56. V. corymbiformis. 
Only the outer cealea) or none, subulat 
Inner scales lax, somewhat re at tip ; leaves 3-5 times as 
long as broad. 57. V. Karwinskiana. 
Inner scales erect, not spreading; leaves 2-2.5 times as long as 
58. V. jaliscana. 
Heads 8-11- nes red. 
Leaves ae glabrous above, 1 cm. wide or les 
59. v umbellifera. 
Leaves very scabrous above, 1.5 cm. wide or mo 
60. - servatuloides. 
Involucre 4-5 mm. high; heads 8-11-flowered. 
Leaves floccose-tomentose beneath 1. V. oaxacana, 
Leaves scabrously pubescent on the veins an 
2. V. capreacfolia. 
Leaves pubescent or puberulent beneath. 
Inner scales sharply acute or acuminate. 63. V. liatroides. 
Inner scales subacute or obtuse. 64. V. Sinclairt. 
VII. PANICULATAE VERAE 
ery large, 1.5-2¢ 
m. broad. 
Scales es in bh a — tiles outer reflexed; leaves ovate 
o1 L I 
msi pe at base. 65. V. Alamant. 
Leaves rounded or obtuse at base. 66. V. dictyophlebia. 
Scales acuminate or filiform at the tip ; leaves linear to lanceolate. CRINI- 
