50 



Sect. I. MONOON. Ovule solitary, usually basal, erect 

 Flowers from the axils of the leaves or of fallen 

 leaves, not from the trunk. 

 Flowers solitary. 



Leaves under 5 in. in length (7 in. in P. 

 Sumatrana), more or less lanceolate. 

 Leaves not glaucous beneath ; petals 



ovate, acute 

 Leaves very glaucous beneath ; petals 

 linear-oblong, obtuse. 

 Ripe carpels smooth 

 Ripe carpels vertically ridged ... 

 Leaves over 5 in, in length, not glaucous. 

 Flowers axillai'y. 



Petals more or less narrowly lan- 

 ceolate. 



Leaves ovate-lanceolate, gla- 

 brous ; ripe carpels oblong, 

 blunt at each end 

 Leaves oblong to obovate-ob- 

 long, more or less pubescent ; 

 ripe carpels elliptic, mu- 

 cronate 

 Petals oblong-elliptic, slightly 

 obovate, 1'3 to 22o in. long ... 

 Flowers terminal ; petals ovate-elliptic, 

 1 to 125 in. long 

 Flowers solitary or in pairs ; ripe carpels little 

 more than "25 in. long. 



Flowers "4 in. in diam. ; petals broadly 



oblong-ovate, obtuse ... 

 Petals 15 to 2 in. long, lanceolate-ob- 

 long ; leaves narrowly lanceolate- 

 oblong or elliptic-oblong 

 Petals "85 to 1'5 in. long, broadly 

 lanceolate or oblanceolate ; leaves 

 oblong-lanceolate to ovate-elliptic... 

 Flowers in pairs ; petals obovate-oblong, 1 in. 



long : ripe carpels ovoid ; '65 in. long 

 Flowers always in fascicles or cymes, axillary 



or from the branches below the leaves 

 Flowers in fascicles from the young branches 



1. P. dumosa. 



2. P. hyi^ohuca. 



3, P. sumatrana. 



4. P. andamnnica. 



6. P .magnoliaejlora. 



6. P. macrantha. 



7. P, pulchra. 



8. P. Kunstleri. 



9. P. Scortechinii. 



10. P. JenJcinsii. 



11. P. Hookeriana. 



12. P. siniiarum. 



299 



