17G DECANDRIA.— MONOGYNIA. 



287. PTEROSPORA. Cal. 5- parted. Cor. monopeta- 



lous, ovate, margin 5-tootherl, reflexed. Anth. 

 excentrically peltate, 1 -celled, bisetose. Caps. 

 5-celled, imperfectly 5-valved ; dissepiments 

 from the middle of the valves ; septa and valves 

 uniting toward the base, and coalescing with the 

 receptacular axis Seeds very minute and nu- 

 merous, each furnished with a terminal wing. 



** Flowers polypetalous, regular. 



288. MONOTROPA. Cat. 3— 5-parted, or 0. Cor. 



5-petalled, cucullate at the base. Anth. 1-celled^ 

 bilabiate. Caps. 5-celled, 5-valved. Seeds nu- 

 merous, invested with a long arillus. 



289. PYROLA. CaL small, 5-cleft. Pet. slightly uni- 



ted at the base, deciduous. Stam. opening with 

 2 pores. Caps. 5-celled, 5-valved. Seeds in- 

 vested with a long arillus. 

 £90. LEDUM. CaL minute, 5-toothed. Cor. 5-petal- 

 led, spreading. Stam. ex*erted ; antli. opening 

 by 2 terminal pores. Caps, subovate, 5-celled, 

 5-valved, opening at the base ; valves with the 

 margins inflexed and approximate ; recept. 5- 

 lobed ; colum. 5-angled, pedicellate. Seeds nu- 

 merous, flat, linear, scabrous, with a membra- 

 naceous wing at each extremity. 



291. LEIOPHYLLUM. Cal. deeply 5-parted, persist- 



ent. Cor. 5-petalled. Stam. longer than the 

 corolla; anth. lateral, opening on the inside 

 longitudinally. Caps, roundish, 5-celled, 5- 

 valved, opening at the top ; valves ovate, with 

 the margins inflexed, remote and straight ; co- 

 lum. subovate, terete, rugose. Seeds small, 

 smooth, not winged. 



292. CLETHRA. Cal. 5-parted, persistent. Cor. 5- 



petalled. Style persistent ; stig. short, 3-cleft. 

 Caps. 3-celled, 3-valved, covered by the calyx, 



*** Flowers polypetalous, irregular. 



293. CASSIA. Cal. 5-leaved. Pet. 5, subequal. Stam. 



unequal; 3 superior anth. sterile; 3 inferior 

 rostrate, with longer and incurved filaments. 

 Legume membranaceous, 2-valved. 



