22 



197. Perianth 3- or 4-lobed 



Perianth 5-lobed ... 



198. Perianth 3-lobed 



Perianth 4-lobcd ... 



199. Perianth 5-cle£t or 5-toothed, thin 

 Perianth 3-5 cleft, fleshy 



200. Tree 



Herb 



20 L Ovary enclosed in the persistent 

 perianth tube .. . 

 Ovary free 



202. Herb or somewhat shrubby, but 



then with sheathing stipules or 

 with scarious perianth 

 Tree or shrub without sheathing 

 stipules and perianth not 

 scarious 



203. Stipules sheathing or annular 

 Stipules none or scarious 



204. Ovary 3-5-locular 

 Ovary 1-celled, with 1 or rarely 



few ovules 



205. Perianth segments herbaceous, 



usually obtuse 

 Perianth segments usually scarious 

 or acute 



206. Sepals free . 



Perianth 4-5-lobed 



207. Perianth of 4 linear segments, 



bearing the stamens ... 

 Sepals 3 to 5, free 



208. Ovary 2-lobed at the top 

 Ovary entire ; fruit 1 seeded 



209. Stamens equal in number to lobes 

 Stamens twice lobes 



210. Perianth 4-5-lobed ; stamens with- 



out alternating scales 

 Perianth 5-lobed ; stamens 8, alter- 

 nating with as many scales ; 

 placentas 3, parietal ... 



211. Capsule 2-3- winged 

 Capsule wingless ... 



212. Small aquatic plant 

 Land plant 



213. Leafless, succulent, root parasite 

 Leafy plant 

 Climber, with tendrils 

 Tree, shrub, or herb ; perianth 



herbaceous or none ... 

 No ovary ; ovule bare or in an 



open perianth... 

 Ovary 1-3- or more-celled 



198. 

 Nyctaginaceae (p. 213). 

 Aristolochiaceae (p. 219). 

 Elaeagnaceae (p. 228). 



200. 

 Ficoideae (p. 114). 

 Hamamelidaceae (p. 100). 

 Santalaceae (p. 229). 



197. 

 202 



203. 



206. 

 Polygonaceae (p. 215). 



204. 

 Ficoideae (p. 114). 



205. 



Chenopodiaceae (p.. 214). 



Amarantaceae (p. 213). 

 207. 

 209. 



Proteaceae (p. 226). 



208. 

 Hamamelidaceae (p. 100). 

 Urticaceae (p. ). 

 Olacaceae (p. 58). 



210. 



211. 



214. 



215. 



Samydaceae (p. 110). 

 Sapindaceae (p. 66). 

 Thymelaeaceae (p. 226). 

 Haloraginaceae (p. 102). 



213. 

 Balanophoraceae (p. 230). 



214. 

 Cucurbitaceae (p. 111). 



215. 



216. 



184 (p. 21). 



