Premna. 109 



b. Leaves 5—15 by 2.7—5 cM., base acute or sub- 

 rounded, apex obtusely acuminate or acute; calyx 0.1 — 

 0.15 cM. ; corolla-tube glabrous, lobes somewhat pubes- 

 cent without 67. 



67. a. Leaves 6V2 — 8 by 4 — 5 cM., relatively broad; corolla- 



lobes somewhat pubescent without 



46. P. leucostoma p. 149. 

 b. Leaves 5 — 15 by 2.7 — 5 cM., relatively narrow; corolla- 

 lobes glabrous without. 47. P. latifolia var. dp. 151. 



68. a. Teeth of calyx acute, corolla glabrous without 



37. P. flavescens p. 136. 



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



without 48. P. pubescens p. 152. 



69. a. Teeth of calyx acute; margins of leaves coarsely crenate; 



corolla-tube 0.45—0.55 cM. long, 0.1—0.15 cM. in diam. 



34. P. angustiflora p. 134. 



b. Teeth of calyx obtuse; margins of leaves serrate or 



denticulate towards the apex only 48. P. pubescens p. 152. 



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 cM., pubescent without; leaves 



often crenate or serrate 69. 



b. Corolla-tube 0.15 — 0.3 cM., glabrous without; leaves 

 entire 72. 



72. a. Base of leaves subobtuse, acute or attenuate; leaves 



2.7—6 cM. broad; petioles V2— IV2 cM. 



47. P. latifolia var. dp. 151. 



b. Base of leaves rounded or cordate; leaves 4V2^ — 16 cM. 



broad, petioles 1 — 6 cM 73. 



73. a. Teeth of calyx usually acute; one lip with 2 large, the 



other with 3 smaller teeth. .37. P. flavescens p. 136. 



b. Teeth of calyx usually obtuse; one lip with 2 large 



teeth, the other often subentire . 8. P. Peekelii p. 115. 



74. a. Teeth of calyx small, '/4 or Vn of the length of the 



calyx . 75. 



b. Teeth of calyx large, '/., of the length of the calyx or 

 more 78. 



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



