1923] PALMER, THE RED RIVER FOREST AT FULTON, ARKANSAS 25 



Crayaegus limaria Sarg. A medium sized tree of the Molles group, of 

 which Fulton is the type station. It is also found in Oklahoma and has a 

 wide range in Texas, extending to the southwestern part of the state and 

 also into Mexico. 



Crataegus brachyphylla Sarg. This recently described species is one of 

 the comparatively rare and local plants of the gravelly ridges and sand 

 hills near McNab. It is a small tree, growing usually in thickets or open 

 hillside woods, and is very distinct from most of the other species of the 

 group. 



X Crataegus notha Sarg. This interesting plant, supposed to de a hybrid 

 between C. apiifolia and C brachyphylla, is growing sparingly on gravel- 

 capped ridges and sandy slopes near McNab. It is a small tree sometimes 

 shrubby in habit, with thin flaky bark, resembling that of C. apiifolia. 

 In leaves, flowers and fruit it is quite intermediate between the two 



supposed parent species, both of which are growing in close proximity 

 to it. 



Prunus serotina Ehrh. Not uncommon in upland woods, usually grow- 

 ing on hillsides or in well drained ground. 



Prunus angustifolia var. varians Wight. Extensive thickets of this 



shrubby Plum are sometimes found on gravelly hillsides and semi-barrens 



along the escarpment. It usually grows to a height of from one to two 



meters and is a free bearer. The fruit is of fair quality and there is both a 

 yellow and red form. 



Prunus Munsoniana Wight & Hedrick. Sometimes found in thickets 

 and open woods along the margins of the uplands. 



Prunus mexicana Wats. This species is quite common in open upland 

 woods and also sometimes grows in the bottoms. It becomes a large tree 

 for the genus, some specimens measuring ten meters in height with a 

 trunk diameter of three decimeters. It usually bears freely but the fruit 

 is of inferior quality and badly infested with weavil. 



Prunus mexicana var. polyandra Sarg. Occasionally found in fertile 

 soil, growing in open woods. 



Prunus mexicana var. fultonensis Sarg. This rather distinct variety is 

 not uncommon in the sand hills section near McNab, from which locality 

 the type specimens came. 



Prunus umbellata Ell. A small tree sometimes found in the sand hills 

 section. 



Prunus umbellata var. tarda (Sarg.) Wight. Found in open woods and 

 on slopes in the sand hills section. 



LEGUMINOSAE 



Cercis canadensis L. Frequent in open woods and thickets, especially 

 on hillsides in the sandy section. 



Gleditsia triacanthos L. Found throughout in upland woods and some- 

 times in the bottoms, but nowhere very common. 



Gleditsia aquatica Marsh. A common and characteristic species of the 



