BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 457 
*CRATAEGUS CHRYSOCARPA Ashe. 
C. rotundifolia of the manuals. 
A single compact bush about eight feet high, formed of several 
trunks, grows in a roadside thicket close to the boundary between 
Quaise and Polpis. It was first observed June 9, 1909, then passing 
out of bloom, most of the corymbs having lost their petals. Close 
to it a group of the following species was white with freshly opened 
blossoms. No other individual of this thorn was met with, nor 
was any other white-anthered species found on Nantucket. This 
sseems to be the earliest flowering of the island’s native thorns. 
Its leaves and flowers are smaller than those of any of the other 
species. 
*CRATAEGUS BICKNELLII Eggleston. 
Discovered on Aug. 16, 1906, in Squam near the Quidnet 
road; a scattered group of treelike shrubs, the tallest about eight 
feet high. It was subsequently found in dry thickets or adjoining 
open ground in Shawkemo, Quaise, Polpis, and Squam, altogether 
at twelve or more separate stations in the northeastern quarter 
of the island. The largest examples are of the proportions of 
small trees, having a strong main trunk 12 to 14.5 inches in girth 
near the base. It flowers profusely, however, at a height of four to 
six feet while still having the conformation of a shrub. In full blos- 
som June 7, 1908, June 9, 1909, June 10, 1911; first flowers June 
4, 1909; red fruit Sept. 17,1907. Flowering rather later than any 
other of the island’s native thorns and more conspicuous when in 
full blossom. Flowers spreading 2—3 cm.; leaves more coriaceous 
and shining than those of any other of the native species and more 
deeply and acutely lobed; thorns stouter. 
*CRATAEGIUS PRUINOSA (Wendl.) C. Koch. 
Found in the same parts of the island occupied by Crataegus 
Bicknellii and in similar situations, but rather more widely spread. 
In only one instance were the two species seen actually together, 
although in several cases they occupied adjacent thickets. The 
nearest points to the town, where it was observed, are on the com- 
mons less than one and a half miles to the east, and near the shore 
at Shimmo Creek. On an exposed knoll, it here forms a close low 
growth among scrub oak and beech plum and was in full blossom 
