KEY TO THE GENERA OF MANHATTAN PLANTS. 21 



Order 50. CELASTRACEAE. 



(Capsule somewhat fleshy, lobed, loculicidally dehiscent. Seeds 1 

 or 2 in each cell, enveloped in a conspicuous scarlet aril. Shrubs.) 



134. Euonymus. (Capsule 4-celled, purple. Upright shrub.) 



135. Celastrus. Capsule orange, 3-eelled. Woody vine. 



Order 51. STAPIIYLEACEAE. 



136. Staphylea. Capsule 3-celled, 3-lobed, thin, much inflated (3-5 cm 

 long), tardily dehiscent along ventral sutures at the top. Seeds few in 

 each cell, bony. Shrub. 



Order 52. ACER ACE AE. 



137. Acer. Fruit deeply 2-lobed, dry, the lobes separating at maturity, 

 each portion forming al-seeded samara. Wing unsymmetrical, terminal 

 and extending down the inner side. Trees. 



Order 53. HIPPOCASTANACEAE. 



138. Aesculus. Capsule 3-celled, loculicidally 3-valved, leathery (more 

 or less prickly) 1-3 seeded. Seeds large (2 cm or more) with a thick, 

 shining (brown) seedcoat and a large pale scar. Shrubs or trees. 



Order 54. BALSAMINACEAE. 



139. Impatiens. Capsules 5-celled, 5-valved, dehiscing violently and 

 throwing out the few seeds in each cell. Valves coiling after dehis- 

 cence. Herbs. 



. Order 55. RIIAMNACEAE. 



140. Ceanotkus. Capsules 3-lobed, 3-celled, supported by the cup- 

 shaped disk. Carpels separating from each other and also dehiscing part 

 way down the dorsal suture. Low shrubs. 



141. Bhamnus. Drupe black, globose and berry-like, stones 2, ovate, 

 flattish, a groove on back and a line along the face, cartilaginous, Anally 

 opening along the suture and letting out the smooth, hard, dark-brown 

 seed. Tall shrub. 



Order 56. VITACEAE. 



Berry 2-celled, mostly 4-seeded. Seeds bony (with a prominent 

 dorsal rhaphe and a deep groove on one side, triangular obovate. Tendril 

 bearing woody vines). 



142. Vitis. (Berry nearly black, edible. Leaves simple). 



143. Parthenocissus. Berry nearly black, inedible. Leaves palmately 

 compound. 



Hi. Ampelopsis. (Berry blue. Leaves simple.) 



Order 57. TILIACEAE. 



145. Tilia. Nut globular, 1-celled, (1-seeded, 7 mm broad, 5-angled 

 at base, surface felty-pubescent). In pedicelled clusters, the peduncle 

 attached to a leaf-like bract, which is deciduous with the cluster. Trees. 



