428 ARRANGEMENT OF THE GENERA 



Order LXIV. PLANTAGINE^E. 



Calyx four-parted, imbricate, persistent. Corolla regular, four- 

 parted. Stamens four. Ovary free, one-celled, or with two or four 

 cells ; ovules one, two, or more ; style one. Capsule opening trans- 

 versely. 



1. Plantago, 96, 102. 2. Littorella, 343, 357. 



Section IV. MONOCHLAMYDE^E. 



Flowers incomplete, or having a single perianth, not distin- 

 guishable into calyx and corolla. 



Order LXV. AMARANTHACE^. 



Perianth of from three to five segments, persistent. Stamens from 

 three to five, hypogynous. Ovary free, one-celled, with one or several 

 ovules ; style one or none ; stigma simple or compound. Capsule one- 

 celled ; seeds from a central placenta 5 embryo curved round a central 

 farinaceous albumen. 



1. Amaranthus, 340, 360. 



Order LXVI. CHENOPODIACE^E. 



Perianth generally five-parted, persistent. Stamens five, two or one, 

 from the base of the perianth. Ovary free or adherent to the tube of 

 the perianth ; style divided, rarely one. Fruit indehiscent, dry, mem- 

 branous, sometimes fleshy. Seed with the embryo spiral, or curved, or 

 doubled, with or without albumen. 



SALSOLE.K. SALICORNIE*. 



1. Salsola, 112,138. 4. Salicornia, 45, 45. 



CHENOPODE.E. ATRIPLICE*. 



2. Chenopodium, 112, 136. 5. Atriplex, 384, 384. 



3. Beta, 111,138. 



Order LXVII. POLYGONEjE. 



Perianth with three, five, or six segments. Stamens varying in num- 

 ber, from the base of the perianth. Ovary one, free, erect ; styles and 

 stigmas several. Fruit a nut or achenium, often triangular. Seed 

 one, with the embryo inverted in a farinaceous albumen. 



1. Polygonum, 182,188. 2. Rumex, 164, 176. 



3. Oxyria, 164, 176. 



Order LXVI1I. ELEAGNE^. 



Mostly dioecious. Perianth tubular, four-parted. Stamens three or 

 more ; anthers two-celled. Fertile flower with the perianth tubular, 

 two- or four-toothed ; ovary one-celled ; style short, stigma glandular. 

 Fruit crustaceous, enclosed within the fleshy perianth. 



1. Hippophae, 367, 379. 



Order LXIX. THYMELE^l. 



Perianth tubular, four- or five-parted. Stamens four or five, in the 

 orifice of the tube ; anthers two-celled. Ovary free, one-celled, with 

 one pendulous ovule. Fruit a nut or drupe. 



1. Daphne, 181, 187. 



