— 35 — 



b. All bracts linear; base op leaves broad, usually rounded or cordate , 



42. P. iniegrifoüa 



62. a. Leaves 8— 25'/ 2 by 6— 147 2 c.M.; petioles 1—2 c.M.; corymbs 8-26 c.M. 

 long, U--24 c.M. in diam.; peduncles 2'/ 2 — 11 c.M,; stigmatic lobes capitate; 



drupe with large central cavity 43. P. macrophylla 



b. Leaves 7--15 by 4'/ 2 -Mj c.M.; petioles 1—4 c.M.; corymbs 10— 17'/ 2 c.M. in 

 diam.; stigmatic lobes subulate .... 36. P. flavescens 



63. a. Leaves 3—8 by 2—5 c.M.; petioles ■'/,— V/ 2 c.M. 64 



b. Leaves 10—35 by 7-20 c.M,; petioles 3-10 c.M 70 



64. a. Leaves entire . . 65 



b. Leaves partly or totally crenate, serrate, or dentate 69 



65. a. Petioles V2-IV2 C.M • -66 



b. Petioles V/ 2 — 5 c.M 68 



66. a. Leaves 3—6 by 2 — 3'/ 2 c.M.; base cordate or rounded, apex acute; calyx 



0.3 c.M.; corolla pubescent without. ... 44. P. depauperata 

 b. Leaves 5-15 by 2.7—5 c.M.; base acute or subrounded, apex obtusely acu- 

 minate or acute; calyx 0.1—0.15 c.M.; corolla-tube glabrous, lobes somewhat 

 pubescent without. . . 67 



67. a. Leaves &/ r S by 4—5 c.M.; relatively broad; corolla-lobes somewhat pu- 



bescent without . 45. P. leucostoma 



b. Leaves 5—15 by 2.7— 5c. M., relatively narrow; corolla-lobes glabrous 

 without 46. P. latifolia Var. d 



68. a. Teeth of calyx acute, corolla glabrous without . 36. P. fiavescens 

 b. Teeth of calyx obtuse, corolla more or less pubescent 47. P. pubescens 



69. a, Teeth of calyx obtuse; margins of leaves coarsely crenate; corolla-tube 



0.45-0-55 c.M. long. 0.1-15 c.M. in diam. .. . 33. P. angustiflora 

 b. Teeth of calyx obtuse; margins of leaves serrate or denticulate towards the 

 apex only 47. P. pubescens 



70. a. Tomentum of the leaves beneath principally simple 71 



b. Tomentum of the leaves beneath principally stellate 74 



71. a. Corolla-tube 0.4-0.55 c.M., pubescent without; leaves often crenate or serrate. 69 

 b. Corolla-tube 0.15-0.3 c.M., glabrous without; leaves entire . , . .72 



72. a. Base of leaves subobtuse, acute or attenuate; leaves 2.7-6 c.M. broad; 



petioles V2-IV2 c.M 46. P. latifolia Var. d 



b. Base of leaves rounded or cordate; leaves 4 1 / 2 -l6 cM. broad, petiolesl-6 c.M. 73 



73. a. Leafbase rounded, leaves ovate or obovate, 9-l2 1 / 2 by 4V 2 -5V 2 c.M.; petioles 



1.3-4 c.M. ; corolla 0.7 c.M.' tube 0.5 c.M. ... 38. P. flavescens. 

 b. Leafbase cordate or subcordate, broad; leaves rotundate or hastate, 9-22 



by 3.3-16 c.M.; petioles 1-7 c.M,; corolla 0.4-0.45 c.M., tube 0.3-0.35 c.M. 7.3a. 

 73A. a. Leaves usually hastate, acumen long tapering and obtuse, base suddenly 



decurrent, sometimes ovate-cordate-rotundate ; pairs of nerves 6-9; calyx 



with acute teeth 48. P. acuminata. 



b. Leaves ovate-cordate-rotundate, base not decurrent, apex acute; pairs of nerves 



5-6; calyx with usually obtuse teeth, one lip sometimes subentire 9. P. Peekelii 



74. a. Teeth of calyx small, V2 or '/ 6 of the lengh of the calyx . . . .75 

 b. Teeth of calyx large, V2 of the length of the calyx or more . . . .77 



75. a. Corolla glabrous without; lobes pubescent within; leaves with petioles 



reaching 15 c.M.; corymbs shorter than the leaves . . 49. P. Goeringii 

 b. Corolla pubescent without; lobes glabrous within or nearly s-o . . .76 



76. a. Leaves abruptly acuminate, 4-6-nerved, 9-20 by 7-12 c.M. ; petioles 2\ 2 — 6 c.M. 



50. P. sfellata 



b. Leaves gradually acuminate, 6-10-nerved, 10-35 by 7-20 c.M,; petioles 2y 2 -10 c.M. 



51. P. tomentosa 



77. a. Corolla glabrous without; lobes pubescent within; leaves with petioles 



reaching 15 c.M; corymbs shorter than the leaves, . 49. P. Goeringii 



