SYNOPSIS OP GENERA. xlix 



Cor. (nectary or perianth) ventricose, l-valved, persistent, enclosing 

 the coriaceous nut or caryopsis. Cyperacece, p. 430. 



TYPHA. Fl. forming a long cylindrical dense spike. STERILE FL. 

 Perianth none. Stamens 3, united below into 1 filament. FERTILE 

 FL. Perianth none. Pericarp pedicellate, surrounded at base with 

 hairs resembling a pappus. Typhacece, p. 380. 



SCLERIA. STERILE FL. Glumes 2 or 6, many-flowered. Palecs un- 

 armed. FERTILE FL. Glumes2or6, 1-flowered. Palece none. Stig. 

 1 3. Jfut coloured, subglobose. Cyperacece, p. 430. 



TRIPSACCM. STERILE FL. Glume 2 flowered ; outer one sterile ; in- 

 ner neutre. Cor. a membranous glume. FERTILE FL. Glume 1-flow- 

 ered, surrounded by a 1-leaved involucre, perforated near the base. 

 Cor! a 2-valved glume. Style, 2. &eed 1. Graminece, p. 399. 



COMPTONIA. STERILE FL. Amtnt cylindrical ; scales 1-flowered. Per- 

 ianth 2-parted. FERTILE FL. Jlment globose ; scales 1-flowered; Styles 

 2. Nut ovate, 1-celled. Jlmentacece, p. 324. 



TETRANDRIA. 



ERIOCAULON. FL collected into a compact scaly head. STERILE 

 FL. in the disk. Perianth single, 4-cleft ; the two inner segments 

 united nearly to their summit. Stamens 4 6. FERTILE FL. in the 

 margin. Perianth single, deeply 4-parted. Style 1. Stig. 2 3, Caps. 

 23 lobed, 23 celled : cells 1-seeded. Restiacece, p. 369. 



ALNUS. STERILE FL. Jlment long cylindrical ; scales 3-lobed, 3- 

 flowered. Perianth single, 4-parted. FERTILE FL. J3men( ovate ; scales 

 2-flowered. Perianth none. Styles 2. Nut compressed. Jlmentaceee, 

 p. 326. 



BOEHMERIA. STERILE FL. Perianth 4-parted. FERTILE FL. Perianth 

 none. Style 1. Nut compressed. Urticece, p. 315. 



URTICA. STERILE FL. Perianth single, 4-leaved. FERTILE FL. Per- 

 ianth 2-leaved. Nut 1, shining. Urticea, p, 313, 



PARIETARIA. FL polygamous. PERFECT FL. Perianth 4-cleft. Sta* 

 mens elastic. Style 1. Nut 1, enclosed by the enlarged perianth. Ur- 

 ticece, p. 315. 



MORUS. Perianth 4-parted ; lobes concave. FERTILE FL. Styles 2. 

 . Seeds 1 2, covered by the fleshy perianth. Jlrlocarpece, p. 316. 



PENTANDRIA. 



CROTONOPSIS. STERILE FL. Perianth 5-parted, with 5 petaloid scales. 

 FERTILE FL. Perianth 5-parted. Stig. 3, twice bifid. Caps. 1-seeded, 

 not opening. Euphorbiacea, p. 310. 



AMARANTHUS. Perianth 2 to 5-leaved. STERILE FL. Stam. 3 5. 

 FERTILE FL. Styles 3. Caps. 1-celled, 1-seeded, opening transversely 

 all round. Arnaranthacece, p. 294. 



XANTHIUM. STERILE FL. Involucre imbricate. Anlh. approximate 

 but not united. Recept. chaffy. FERTILE FL. Invol. 2-leaved, 1-flow- 

 ered. Cor. none. Nut 2-celled. Composites, p. 210. 



AMBROSIA. STERILE FL. Involucre 1-leaved, hemispherical. Anih. 

 approximate but not united. Recept. naked. FERTILE FL. Invol. l- 

 leaved, entire or 5-toothed, 1 -flowered. Cor. none. Nut formed from 

 the indurated calyx, 1 seeded. Composite, p. 209. 



4a*' 



