xliv 



ANALYTICAL KEY 



TO THE ORDERS AND ANOMALOUS GENERA OF THE HONGKONG FLORA. 



CLASS I. DICOTYLEDONS. 



(See p. 1.) 



Flowers polypetalous (with several petals free from each other, although some- 

 times adherent to the staminal tube). 

 Flowers regular or nearly so. 



Pistil apocarpous (consisting of several carpels, either quite distinct or slightly 

 cohering at the base with distinct styles), or of 1 carpel with 1 unilateral 



placenta and 1 simple style ' A. 



Pistil syncarpous (the carpels united into & single ovary, with 2 or more cells 

 or 2 or more parietal placentas or styles). 

 Stamens hypogynous or very slightly perigynous. 



Stamens indefinite B. 



Stamens definite, twice the number of petals or fewer C. 



Stamens very perigynous or ovary inferior. 



Stamens indefinite D. 



Stamens definite, twice the number of petals or fewer E. 



Flowers very irregular F. 



Flowers monopetalous (the petals united at least at the base into a single lobed, 

 toothed, or rarely entire corolla). 



Ovary inferior G. 



Ovary superior H. 



Flowers apetalous. Perianth of a single whorl of segments or lobes, or none . I. 



A. Regular apocarpous Poly petals. 

 Stamens indefinite. 



Stamens very perigynous Rosacea, p. 103. 



Stamens hypogynous. 

 Carpel solitary. 



Sepals and petals 4 or 5, small, valvate. Trees or shrubs, 



with compound leaves Mimose^;, p. 73. 



Sepals 3 to 5, imbricate. Climber with simple leaves . Delima, p. 7. 

 Carpels many. 



Sepals 5, valvate, no petals. Climber with opposite leaves Clematis, p. 6. 

 Sepals 3. Petals 6 to 12, all much imbricate in series of 



3 each Magnoliace^:, p. 7. 



Sepals 3. Petals in 1 or 2 series of 3 each, all valvate, 



or the petals slightly imbricate Anonace^;, p. 9. 



(See also Sagittaria in Monocotyledons.) 

 Stamens definite. 



Stamens equal in number and opposite to the petals (alternate 

 with the sepals when the petals are wanting). Climbers. 

 Carpels 3, with 1 ovule in each. Leaves simple . . . MenispermacejE, p. 11. 

 Carpels 3, with several ovules in each. Leaves digitate . Stauntonia, p. 14. 



