Ulmacea Planer a. 405 



1. P. Richdrdii, syn. P. crenata. This is a handsome 

 deciduous tree from 60 to 80 feet high with oblong deeply 

 crenate leaves and smooth deciduous bark. A native of the 

 Caucasus, by no means so common in our parks as it deserves 

 to be, for it is perfectly hardy, though it rarely flowers in this 

 country. 



P. aqudtica, syn. P. ulmifolia, is a North American species 

 with serrated foliage, of much smaller stature and less hardy. 

 P. Japonica is a similar Japanese species recently intro- 

 duced. 



3. C^LTIS. 



Moderately large trees or shrubs with strongly-nerved leaves, 

 fascicled or racemose greenish polygamous or hermaphrodite 

 flowers succeeded by small 1 -seeded drupaceous fruits. The 

 few species described are widely scattered, ranging from the 

 Mediterranean region through Central Asia to China. Celtis is 

 a classical name for the Lotus. 



1. G. australis. Nettle Tree or Tree Lotus. A handsome 

 tree from 30 to 40 feet high with a straight trunk and 

 long slender tough pliant branches. Leaves oblong-lanceolate, 

 acuminate, deeply serrate, hispid above, softly pubescent 

 beneath, unequal at the base. Fruit black, very sweet and 

 edible. A native of the Mediterranean region. 



C. occidentalism Sugar-berry or Hack-berry, is a very vari- 

 able North American species, and includes the forms called 

 C. crassifolia, G. pumila, and G. Audibertiana. The ordinary 

 form has reticulated cordate-ovate or lanceolate sharply serrate 

 leaves and slender-stalked flowers. The variety crassifolia 

 is remarkable for its fleshy foliage. 



ORDEK CJV.-PLATANACEJE. 



Highly ornamental deciduous trees with large elegantly 

 lobed leaves on long petioles, and conspicuous sheathing 

 stipules. Flowers destitute of perianth, monoecious, in separate 

 naked spherical bracteolate solitary or clustered catkins, on long 

 pendent peduncles. Male flowers with 1 stamen. The 1 -celled 

 1- or 2-seeded nuts or achenes, are arranged in dense heads. 

 The order is restricted to a solitary genus whose few species 

 occur in North Africa, Western Asia, and North America. 



