JOURNAL 



OF THE 



ARNOLD ARBORETUM 



Volume VI JANUARY and APRIL, 1925 Number 1 & 2 



NOTES ON CRATAEGUS 



C. S. Sargent 



Mr 



Arboretum herbarium has made some interesting observations. 



One of the most interesting of these is the fact that Crataegus olivacea 

 (Sargent in Proc. Acad. Nat. Sci. Phila. lxii. 153 [1910] ) based on a speci- 

 men of the Crus-galli group collected in the valley of the Little Juniata 

 River near Altoona, Pennsylvania, in 1905 by B. H. Smith in May and 

 by C. S. Sargent in September, is the same as the plant cultivated in 

 Europe for at least one hundred years as Mespilus Fontanesiana Spach 

 and Crataegus Fontanesiana Steudel; also the plant raised from seeds 

 received from the Paris Museum in 1876 and grown in the Arboretum 

 as Crataegus Fortunei, an unpublished name, proves to be Crataegus 

 Fontanesiana. This discovery is interesting as showing that the general 

 opinion in Europe that C. Fontanesiana was of North American origin 



was correct. 



Crataegus exigua Sargent (in Rhodora, v. 52 [February 1903] ) is probably 

 best considered, as pointed out by Eggleston (in Rhodora, x. 75 [1908] ) 

 as a variety of Crataegus Crus-galli, C. Crus-galli var. exigua. This plant 

 must not be confused with the C. exigua of Ashe (in Jour. Elisha Mitchell 

 Sci. Soc. xix. 20 [1903]) from Wisconsin, said to be a species of Tenuifoliae, 

 but not represented in the Arboretum herbarium. 



Crataegus Crus-galli L., after a longer study of the genus, must be 

 considered more widely distributed and more variable in the shape of 

 the leaves than was formerly believed; and Mr. Palmer rightly suggests 

 that C. strcmgylophylla Sargent (in Rep. Mo. Bot. Gard. xix. 44 [1908] ) 

 from Webb City, Missouri, cannot be distinguished by any good character 

 from the Linnaean species and must be considered a synonym of it. 



Crataegus arduennae Sargent. To this Crus-galli species with 10 sta- 

 mens and yellow anthers, first noticed at Glenellyn, Illinois, may probably 

 best be referred the following Missouri plants as synonyms: Crataegus 

 ferox Sargent (in Rep. Mo. Bot. Gard. xix. 52 [1908]); C. albanthera 

 Sargent (1. c. 53); and C. candens Sargent (1. c. 55). 



