1925] PALMER, SYNOPSIS OF NORTH AMERIC AN CRATAEGI 5 



length 



Flowers 



1.5 cm. in diameter, in small mostly 5- or 6-flowered corymbs, furnished 

 with broad conspicuously glandular-serrate deciduous bracts; calyx 

 glabrous with narrow acuminate glandular-serrate lobes often persistent 

 on the ripe fruit; stamens 7-10; anthers pale pink; styles 2-4. Fruit 

 ripening in early October, subglobose, dull crimson, punctate, about 1.5 

 cm. in diameter; nutlets 3-4, rounded on the back and ends, slightly 

 broader at the apex than at the base, 5-6 mm. in length. 



Usually a shrub from 4.5-5 m. high, with stout stems covered with 

 dark corky bark, and erect or ascending branches armed with numerous 

 slender straight or slightly curved dark purple spines 4-5 cm. in length; 

 or often a small tree 5-6 m. high. 



Rocky limestone hills near Galena, Stone County, Missouri, E. J. 

 Palmer, October 13, 1913 (No. 4645, type for fruit), September 27, 1920 

 (No. 19,183), April 29, 1924 (No. 24,569, type for flowers), all from plant 



23, 1923 (No. 22,798), April 29, 1924 (No. 



Marion 



No. 3; same locality, May 23, 1923 (No. 22 

 24,568). Rocky upland woods, near Cotter, in 

 E. J. Palmer, June 18, 1914 (No. 6026). 



The specimens of Mr. Palmer's plant No. 3 can probably best be regarded 

 as a variety of C. padifolia of the Intricatae group which occurs in this 

 region, and from which it differs in its generally broader and usually slightly 

 lobed leaves and in its larger and softer crimson fruit. 



Crataegus panda has been used for two different plants, first by Beadle 

 in 1902 (Biltmore Bot. Studies, i. 89) for a shrubby species of the Flavae 

 group from the neighborhood of Tallahassee, Florida, and second by 

 Ashe in 1903 for a plant from Glendon, N. Carolina (in Jour. Elisha Mit- 

 chell Sci. Soc. xix. 29). The description does not give the group to which 

 this plant belongs and there is not a specimen in the Arboretum herbarium. 



Crataegus cirrata was used in 1902 by Beadle (Biltmore Bot. Studies, I. 

 101) for a shrubby species of the Flavae group from Girard, Alabama. 

 The same name was used in 1916 by Ashe (in Bull. Charleston Mus. xn. 

 42) for a plant from Georgia, no information being given of the type locality 

 or of the group to which it belongs. Ashe's plant is not represented in 

 the Arboretum herbarium. 



SYNOPSIS OF NORTH AMERICAN CRATAEGI 



Ernest J. Palmer 

 INTRODUCTION 



The following alphabetical list and synoptical tables of the North 

 American species and varieties of the genus Crataegus was compiled 

 several years ago, in a somewhat different form, for use in the Herbarium 

 of the Arnold Arboretum. It was not intended for publication and was 



