REPORT OF THE STATE BOTANIST IQI2 53 
CRATAEGUS IN NEW YORK 
So much has been learned of the characters and distribution of 
the different species of Crataegus in New York during the last 
three or four years through the collections and observations of 
a number of students of these plants that it now seems desirable 
to join in a brief summary this information with that contained 
in the various publications on the subject which have appeared 
in the last ten years. 
In western New York Crataegus has been more systematically 
and carefully collected and studied than in any other part of 
North America, but there is still much field work to be done be- 
fore the species of the eastern, southern and central parts of the 
State are equally well known, and it is hoped that the publica- 
tion of this synopsis of the work already accomplished may lead 
to further investigations and collections. 
C. S. SARGENT 
Arnold Arboretum 
Jamaica Plain, Mass. 
December 1912 
KEY TO THE SPECIES 
Synopsis of the groups 
SME TS WILMOUL VeltGal CaVItIES.. 2... .0).. ese sae eee eee eee 
(Groups Crus-galli-Anomalae) 
B Nutlets with longitudinal cavities on their ventral faces..... 
| (Group Tomentosae) 
Crus-galli 
Leaves subcoriaceous to coriaceous, obovate to oblong-obovate, 
usually rounded, or acute or acuminate at the apex, mostly 
serrate only above the middle, without lobes except on vigor- 
ous shoots, their veins thin and sometimes within the paren- 
chyma, petioles short, usually eglandular; flowers in many- 
flowered corymbs; fruit subglobose to short-oblong, flesh thin, 
usually green. 
* Veins of the leaves within the parenchyma; stamens I0 
Atpbiers suse color =... on += 0 se es GC. erars ea Tha 
PMR ITEC 0 ops oes, aj bwin 2, wiaunie ye Bais «> SS at Give kn hale 
** Veins of the leaves prominent 
+Glabrous with the exception of occasional hairs on the 
young leaves; anthers pale pink 
