Geunsia. 31 



1. a. Anthers short and broad, the proportion of length and 



breadth being + 2 2. 



b. Anthers long and narrow," the proportion of length and 

 breadth b^ing ± 4—5 10. 



2. a. Lower side of leaf adult subglabrous or sparsely pube- 



rulous; reticulation of nerves often very conspicuous . 3. 



b. Lower side of leaf adult densely yellow- or brown- 



tomentose 5. 



3. a. Leaf with a 472— 6V2 cM. long, narrow acumen 



1. G. acuminatissima p. 32. 

 b. Leaf with much shorter acumen 4. 



4. a. Leaf 9 — 11 nerved, base abruptly attenuate; corolla-lobes 



glabrous or nearly so . . . 2, G. pentandra p. 33. 



b. Leaf 7 — 9-nerved, base gradually attenuate; corolla-lobes 



villous in the centre without ... 3. G. Pullei p. 35. 



5. a. Corolla-lobes and stamens 4 — 5 6. 



b. Corolla-lobes and stamens 6 — 7 . . . . . 7. 



6. a. Leaves 14—18 by 5— 7V2 cM.; petioles 2V2— 4 cM.; 



usually sparsely puberulous beneath; base attenuate; 

 corolla-lobes villous in the centre without 



3. G. Pullei p. 35. 

 b. Leaves 16 — 28 by 7 — ^14 cM. ; petioles 1^ — 3 cM.; lower 

 surface densely tomentose; base often it cordate, corolla- 

 lobes, not or minutely puberulous 



4. G. Cumingiana p. 35. 



7. a. Breadth of leaves 2V2— 5.2— 71/2 cM 8. 



b. Breadth of leaves 5—11 cM., length 11—24 cM.; calyx 



0.3 cM. ; corolla 0.7 cM., softly pubescent, 6 — 7-merous 



5. G. hexandra p. 37. 



8. a. Leaves 4^/g — 5^/2 cM. broad, base subrotundate ; petioles 



172^ — 2 cM.; corolla 5 — ^6-merous; filaments glandular 

 below; peduncles 2^/3 cM. . 6. G. grandiflora p. 38. 

 b. Leaves 272' — 5 cM. broad, base + obtuse or acute; 

 petioles IV2 — 272 cM.; corolla 6 — 7-merous; filaments 

 glabrous, peduncles 3. — 5 cM 9. 



9. a. Corolla 6-merous; lobes densely pubescent and glandular, 



except near the margin . . 7, G. epiphytica p. 38. 

 b. Corolla 7-raerous; lobes glandular 8. G. flavida p. 39. 



