Class XII.— POLYANDRIA. 



Order I.—MONOGYNIA. 



Calix 7-cleft. Petals 7, Stamina 14. Cap- 

 sule 7-celled, many-seeded. 



Small and often g-lutinous shrubs with alternate entire 

 leaves, and flowers in condensed or racemose panicles. 



Species. 1. B. racemosa. — A small tropical Americai\ 

 genus of 4 or 5 species. 



354. TILIA. L, (Linden or Lime-tree.) 



Crtto inferior, 5-parted, deciduous. Petals 5, 

 Immature capsule 5-ceIIed, 5-valved, cells l or 

 2-seeded: mature capsule coriaceous, globose, 

 1 -seeded, bursting at the base. 



Trees with cordate leaves; peduncles axillary and soli- 

 tary, cymose, each adnate to the centre of a membranaceous 

 alated bracte or floral process unconnected towards its 

 summit; flowers white. 



Species. 1. T. glabra. Obs. Cymes twice trichoto- 

 mous. Internal petals 5 attached to as many fascicles of 

 stamina; stamina in each bundle about 10; immature cap- 

 sule, 5-valved, 5-cel';.d, cells 2-sceded. 2. laxijioni. 3. 

 pubescens. 4. heterophijlla. 



An American genus with the exception of 2 species in- 

 digenous to Europe, 



155. HELLiNTHEMUM. Tournefort. Jussitu. 

 Segments of the calix mostly unequal, the 2 

 exterior smaller. Petals 5. Capsule, superior, 

 1 -celled, 3-val\ed, valves septitcrous in the cen- 

 tre. 



