i 26 MONOCI ILAMYDEAE 



Order VII. Aristolochiales. 



A. Inflorescence axillary or terminal, usually 1 -flowered. Rowers 



bisexual. Androecium cylindrical, in most cases of 6 stamens. 

 Stigma lobed. Placentae axile. Seeds with copious endosperm. 

 Climbing shrubs. 



(page 172) [3. Aristolochiaceae 



B. Inflorescence racemose. Flowers unisexual. Androecium cylindrical, 



formed of 8 — 12 anthers. Stigma cylindrical. Placentae parietal. 

 Seeds with thin endosperm. Root parasites. 



(page 174) 14. Rafflesiaceae 



Subfam. Cytineae 



C. Flowers solitary, bisexual. Androecium flat, 3 — 4-lobed, formed of 



numerous connate anthers. Stigmatic surface flat, expanded, 



3 — 4-lobed. Placentae pendulous from the roof of the ovarial 



cavity. Seeds with copious perisperm. Root parasites. 



(page 176) 15. Hydnoraceae 

 Order VIII. Polygonales. 



(page 180) 16. Polygonaceae 

 Order IX. Centrospermae. 



A. Perianth bract-like. Carpels i-ovuled. 



a. Perianth herbaceous (rarely o), the segments mostly enlarging with 



the fruit and enclosing it. 



(page 182) 17. Chenopodiaceae 



b. Perianth-segments membranous, often coloured. 



(page 186) 18. Amarantaceae 



B. Perianth simple, often petaloid. (A double perianth occurs in 



Limeum and Semonvillea and pseudopetals in some Aizoaceae, 

 viz. Orygia and Mesembr'uinthemum.) 



a. Ovary 1 -celled, i-ovuled. Fruit enclosed within the hardened 



perianth-tube. 



(page 190) 19. Nyctaginaceae 



b. Ovary 2- or more-celled; cells i-ovuled. Fruit capsular or 



indehiscent. Inflorescence racemose. 



(page 193) 20. Phytolaccaceae 



c. Ovary 2- or more-celled ; cells with 2 or more ovules (exc. in some 



Mollugineae). Inflorescence cymose or flowers solitary. 



(page 194) 21. Aizoaceae 



C. Perianth double, but the petals sometimes abortive. 



a. Herbs or shrubs with entire, mostly succulent leaves. Sepals 2, 



deciduous. 



(page 210) 22. Portulacaceae 



b. Herbs, sometimes half shrubby, with narrow, mostly opposite 



leaves. Calyx 4 — 5-cleft or -parted. 



(page 2 1 2) 23. Caryophyllaceae 



