36 ; A FLORA OF MANILA 
1. Apetalae 
(Incompletae) 
(Corolla none, or the perianth segments all alike, or the perianth entirely 
wanting.) 
1. Trees with slender, green, jointed branchlets, the leaves reduced to small 
Beales at the neces... eee 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-cellodhyeaatis ey ha: | ee 26. Moraceae (p. 172) 
4. Ovary 3-celled, or cells more numerous. 
75. Euphorbiaceae (p. 279) 
8. Plants with watery juice. 
4. Perianth entirely wanting; small succulent herbs or somewhat 
woody vines, more or less aromatic; flowers small, in slender 
oF thickened ‘spikesi(/20) 292 2k 34. Piperaceae (p. 169) 
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 achene, sometimes surrounded by the fieshy, 
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. Hernandiaceae (p. 212) 
(liligera) 
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 
leafies branches.....:............-- 42. Polygonaceae (p. 187) 
9. Plants without sheathing stipules and without tendrils, 
the branches not flattened and jointed. 
10. Fruit a small drupe; calyx-lobes valvate; a shrub or 
small ines. 3-2. ee 39. Opiliaceae (p. 184) 
10. Fruit not drupaceous; calyx-lobes imbricate or 
valvate. 
