APETALAE 



9 



8i. Perianth-segments 6, petal-like, free. Stamens 8 — lo. Style 3 — ^4-cleft. 

 Flowers dioecious. Spiny trees. . . Didierea, 134. Sapindaceae. 



Perianth-segments i — 5 82 



82. Perianth with valvate and folded aestivation, lobed, enlarged in fruit. 



Stamens hypogynous, united at the base. . . .69. Nyctaginaceae. 



Perianth with imbricate or open aestivation, rarely with valvate not folded 



aestivation ; in the latter case deeply divided 83 



S^. Stamens i — 10, perigynous, rarely {Queria) 10, hypogynous. Stipules 

 present, rarely absent, and then leaves opposite and styles 2 — 3. 



75. Caryophyllaceae. 



Stamens i — 5, hypogynous or nearly so, rarely distinctly perigynous, but 



then stipules wanting and leaves alternate or style i 84 



84. Stamens as many as the perianth-segments or one less (3 — 5), alternating 



with them, hypogynous. Flowers hermaphrodite 85 



Stamens as many as the perianth-segments or one less, but opposite to them, 

 or considerably fewer, or in greater number. Leaves without sti- 

 pules 86 



85. Flowers in cymes, 5-merous. Perianth membranous. Embryo hooked. 



Leaves whorled, usually stipulate. . . Adenogramma, 72. Aizoaceae. 

 Flowers in spikes or racemes, with bracteoles. Perianth herbaceous. 

 Embryo nearly ring-shaped. Leaves alternate, usually exstipulate. 



71. Phytolaccaceae. 



86. Perianth more or less scarious or papery. Seed albuminous ; embryo 



ring- or horseshoe-shaped. Flowers with bracteoles. 68. Amarantaceae. 

 Perianth more or less herbaceous or membranous. Stigmas 2 — 5. 



67. Chenopodiaceae. 



Sy. (80.) Leaves stipulate 88 



Leaves exstipulate 89 



SS,. Leaves opposite, undivided. Stamens 2 — 5. Seed albuminous. 



75. Caryophyllaceae. 

 Leaves alternate. Seed exalbuminous 103. Rosaceae. 



89. Stem herbaceous. Flowers in heads, unisexual. Stamens as many as 



and alternate with the perianth-segments. Stigmas 2 in the female 



flowers. Seed exalbuminous 226. Compositae. 



Stem woody. Stigma i 90 



90. Perianth with imbricate aestivation. Stamens numerous, free or nearly 



so. Seed exalbuminous. . . . Calophyllum, 149. Guttiferae. 

 Perianth with valvate aestivation 91 



91. Stamens attached to the perianth, as many as its segments, 4, rarely 5 ; 



filaments free. Seed exalbuminous 92 



Stamens free from the perianth, as many as its segments or more often in 

 greater number ; filaments more or less united. Seed albuminous. 93 



92. Stamens opposite the perianth-segments. Flowers in spikes or heads. 



55. Proteaceae. 



