36 A FLORA OF MANILA 



1. Apetalae 

 {Incompletae) 

 (Corolla none, or the perianth segments all alike, pr the perianth entirely 

 wanting.) ' 



1. Trees with slender, green, jointed branchlets, the leaves reduced to small 



scales at the nodes 33. Casuarinaceae (p. 168) 



1. Not trees with jointed branchlets. 

 2. Ovary superior; flowers regular. 



3. Plants with milky juice... 75. Euphorbiaceae (p. 279) 



4. Ovary 1-celled 26. Moraceae (p. 172) 



4. Ovary 3-celled, or cells more numerous. 



75. Euphorbiaceae (p. 279) 

 3. Plants with watery juice. 



4. Perianth entirely wanting; small succulent herbs or somewhat 

 woody vines, more or less aromatic; flowers small, in slender 



or thickened spikes 34. Piperaceae (p. l69) 



4. Perianth present, consisting of the calyx only, or if the corolla 

 be present, then similar to the calyx in form, color, and size. 

 5) Ovary 1-celled, 1-ovuled, the ovules rarely more than one. 

 6. Submerged aquatic plants with finely divided leaves. 



50. Ceratophyllaceae (p. 202) 

 6. Not submerged aquatic plants with finely divided leaves. 

 7. Flowers unisexual. 



8. Fruit a small drupe; stigma 2 36. Ulmaceae (p. 171) 



8. Fruit an acl^ne, sometimes surrounded by the fleshy, 

 accrescent perianth. 

 9. Ovules erect ; stamens mostly inflexed in bud. 



37. Urticaceae (p. 179) 

 '9. Ovules pendulous; stamens mostly erect in bud. 



36. Moraceae (p. 172) 

 7. Flowers perfect, or if unisexual then shrubs with flattened, 

 jointed stems, or the anthers 'opening by hinged valves, 

 not by slits or pores. 

 8. Anthers opening by hinged valves. 



9. Leaves simple; fruit not winged; ovary enclosed in the 

 calyx-tube but free from it; trees, or one genus 

 slender, leafless, parasitic vines. 



55. Lauraceae (p. 209) 

 9. Leaves 3-foliolate; fruit winged; vines. 



56. Hemandiaceae (p. 212) 



(Illigera) 



8. Anthers opening by longitudinal slits or by pores, never 



by hinged valves. 



9. Herbs with sheathing stipules, vines bearing tendrils, 



or shrubs with flattened, jointed, leafless or nearly 



leaftes branches 42. Polygonaceae (p. 187) 



9. Plants without sheathing stipules and without tendrils, 

 the branches not flattened and jointed. 

 10. Fruit a small dtupes .cftJyx-lobes '^alvate ; a shrub or 



small tree 39. Opiliaceae (p. 184) 



10. Fruit not drupaceous; calyx-lobes imbricate or 

 valvate. 



