326 MONOECIA.— PENTANDRIA. 



united nearly to their summit. Stam. 4 — i 

 fertile fl. in the margin. Perianth single, 

 deeply 4-parted. Style 1. Stig. 2 — 3. Caps* 

 2 — 3-lobed, 2 — 3-celled ; cells 1-seeded. 



536. ALNUS. sterile fl. Ament composed of 3- 



flowered, cuneiform truncate receptacles. Cal* 

 the scales of the ament, 3-lobed. Cor. 4-parted. 

 fertile fl. Scales of the ament 2-flowered, 

 subtrifid. Cor. 0. Seed compressed, wingless. 



537. BOEHMERIA. sterile fl. Cal. 4-parted. 



Cor. 0. Nectary 0. fertile fl. Cal. and 

 Cor. 0. Seed 1, compressed. 



538. URTICA. sterile fl. Cal. 4-leaved. Cor. 0. 



Nectary (abortive germen ?) central, mostly 

 cyathiform. fertile fl. Cal, 2-leaved. Pe- 

 ricarp 1 seeded, shining. 



539. PARIETARIA. Flowers polygamous, perfect. 



Cal. 4-cleft. Cor. 0. Stam. elastic. Style 1. 

 Seed 1, superior, fertile. Cal. 2-leaved. 

 Seed covered by the dry and elongated calyx. 



540. MORUS. sterile fl. Cal. 4-parted. Cor. 0. 



fertile fl. Cal. 4-leaved, becoming a berry 

 Cor. 0. Styles 2. Seeds solitary. 



PENTANDRIA. 



541. CROTONOPSIS. sterile fl. Cal. 5-parted. 



Cor. 5-petalled. fertile fl. Cal. 5-parted. 

 Cor. 0. Stig. 3, twice bifid. Cap. 1-seeded 

 512. AMARANTHUS. sterile fl. Cal. 3—5- 

 leaved. Cor. 0. Sta?n. 3 — 5. fertile fl. 

 Cal. 3—5 leaved. Cor. 0. Styles 3. Caps. 1- 

 celled, opening transversely all round. Seed 1. 



543. XANTHIUM. sterile fl. Cal. imbricate. 



Anthers approximate, but not united. Recept. 

 palaceaceous. fertile fl. Cal. a 2-leaved 

 involucrum, 1-flowered. Cor. 0. Drupe? dry, 

 muricate, 2-cleft. Nut 2-celled. 



544. AMBROSIA, sterile fl. Cal, 1 -leaved. Anth. 



approximate, but not united. Recept. naked. 

 fertile fl. Cal. 1 -leaved, entire or 5-toothed. 

 1-flowered. Cor. 0. Nut formed from the in 

 durated calyx, 1-seeded. 



