204 ECONOMIC BOTANY OF ALABAMA 



75 species of Crataegus not recognized ten years earlier, when the 

 4th vokime of the same work was pubHshed, and a key to all the 

 arborescent si^ecies then known in the United States, (S4 in num- 

 ber, with the observation that there were also a few shrubby ones. 

 Just about half the added species were described by Prof. Sargent 

 himself, in 1901 and 1902, and more than a third of the remainder 

 by Mr. Beadle in 1899 to 1901. Many more were added by Beadle 

 in 1902, evidently too late for inclusion in that volume of Sargent's 

 Silva. 



Small's Flora of the Southeastern United States (1903) con- 

 tains 185 supposed species of Crataegus (trees and shrubs), about 

 three-fourths of them first described by Mr. Beadle, who revised 

 the whole genus for that work. They are divided into 33 named 

 groups, or tribes, most of which probably correspond approx- 

 imately with species as understood a decade earlier. This seems 

 to have been alK)Ut the culmination of the Crataegus boom, and 

 there are no more species in the second edition of vSmall's Flora, 

 ten years later. 



The tide seems to have begun to recede about that time, for 

 the first edition of Sargent's Manual of Trees (1905) recognizes 

 only 132 arborescent species of Crataegus in the whole United 

 States and Canada. ( Three of these grow in the Rocky Moun- 

 tains and westward, and the rest from Texas eastward.) In the 

 seventh edition of Gray's Manual (edited by Robinson & Fernald, 

 1908), the genus was revised by W. W. Eggleston, and limited to 

 65 species and several varieties (25 major varieties and about the 

 same number of minor varieties, forms and hybrids), in 18 tribes, 

 in the northeastern states and Canada. (Just how many of these 

 should be classed as trees, and how many shrubs, is not api)arent 

 from the descriptions). Britton and Shafer, in their book on North 

 American trees (1008), described only 51 arborescent species of 

 Crataegus for the whole country. The second edition of Britton 

 & Brown's Illustrated Flora (Vol. 2, 1913) lists i3 species for 

 the northeastern states and Canada. 



The last edition of A. A. Heller's Catalogue of Plants of 

 North America north of Mexico (1909-1914) lists 957 names in 

 Crataegus. This represents practically the sum of the activities of 

 Beadle, Sargent and their predecessors, making little or no allow- 

 ance for duplications. 



