244 EGGLESTON: CRATAEGI OF NORTHEASTERN MANUAL RANGE 
In 1904 Mr. E. P. Bicknell passed over to me fruiting material 
of a very interesting Crataegus. At that time we had no flowers 
of this species, nor any flowering material from Nantucket, except- 
ing a fragment collected by Miss Mary A. Day, at Wauwinet. 
This flowering specimen puzzled me, seeming intermediate between 
Mr. Bicknell’s form and typical C. chrysocarpa Ashe (C. rotundi- 
folia of the manuals). This led me to describe the Bicknell form 
as a variety of rotundifolia. Mr. Bicknell has done much explor- 
ing in Nantucket since then, and his material now leads me to 
consider this Crataegus a good species. 
Crataegus Bicknellii sp. nov. 
C. rotundifolia var. Bicknellii Eggl. Rhod. 10: 79. 4 Je 1908. 
A round-topped, shrubby tree, sometimes 3 m. high; spines 
stout, numerous, 2-6 cm. long; vegetative twigs glabrous; leaves 
ovate or oblong-ovate, 4-8 cm. long, 3-7 cm. broad, acute at the 
apex, broadly cuneate or rounded at the base, sharply doubly 
serrate with acute lobes toward the apex, dark green and shining 
above, glabrous; corymbs many-flowered, glabrous; flowers about 
16 mm. broad; stamens about 10; anthers light purple; calyx 
lobes long-acuminate, laciniate; styles and nutlets usually 4 or 5; 
fruit globose, red, about 10 mm. thick; calyx lobes persistent, 
reflexed, conspicuously lobed; flesh of fruit soft at maturity. 
E. P. Bicknell 1 (type), Quidnet (Polpis), Nantucket, Mass., 
‘Sep. 5, 1904. (Herbarium of the New York Botanical Garden.) 
The following specimens were used in the description: 
Bicknell 2, Quidnet, Sep. 5, 1904. 
Bicknell 3, Quaise, Nantucket, Aug. 16, 1906. 
Bicknell 4, Quaise, Nantucket, Sep. 17, 1907. 
Bicknell 5, east of Rattlesnake Bank, Nantucket, June II, 
1908. 
Bicknell 6, Shawkemo, Nantucket, June 4, 1909. 
Bicknell 7, Quaise, Nantucket, June 9, 1909. 
This species differs from C. chrysocarpa Ashe in its more 
sharply lobed leaves and calyx lobes, and its more numerous 
nutlets. 
UREAU OF PLANT INDUSTRY, 
WASHINGTON, D. C 
