1902] NORTH AMERICAN TREES 115 
narrow margin of pale hairs. Fruit on slender peduncles in few- 
fruited drooping glabrous clusters, dark dull red, % to % in. in 
diameter; calyx prominent, with a broad shallow cavity and 
elongated, coarsely serrate, appressed or incurved lobes; flesh 
thin, yellow, dry and mealy; nutlets 2 or 3, broad, rounded, and 
tidged on the back with low wide ridges, % in. long. 
A slender tree, 20 to 25 feet in height, with a tall stem 5 or 6 in. in 
diameter, covered with dark furrowed and scaly bark, and often armed with 
long-branched spines, ascending branches. forming a narrow oval head, and 
slender, nearly straight, branchlets, dark orange-green and villose when they 
first appear, marked by large, oblong, pale lenticels. becoming glabrous and 
bright chestnut-brown in their second season, and dull reddish-brown the fol- 
lowing year, and armed with numerous slender, nearly straight, bright 
chestnut-brown lustrous spines I to 2% in. long. 
Flowers during the first week in May. Fruit ripens about the middle of 
September and soon falls. 
Low woods and the gravelly banks of small streams, Ripley county, 
Southeastern Missouri, B. F. Bush, Monteer, July 26, 1899, Pleasant Grove, 
Pact 1899 ; C. S. Sargent, Pleasant Grove, September 30, 1900; B&B. F. 
» *easant Grove, May 7, and Grandin, May 8, 1901. 
Probably best associated with Crataegus collina of Chapman, Crataegus 
‘‘rdida differs from that species in its ascending, not wide-spreading, 
: praia by the much larger later fragrant flowers, which have narrow 
ae nestle dull dirty white petals, rose-colored anthers, and 2 
- obconic in ie € in the flowers of Crataegus collina the calyx-tube is broadly 
ee SOR eed or villose, the petals pure white, the anthers yellow, 
ee S 5 in number. 
Oe “ees Sera, n. sp. Leaves oblong-ovate, acute, rounded, 
a the Sa nae cordate, particularly on vigorous shoots at 
shat oc, | eo irregularly divided into four or five pairs of 
= ‘nearly 2 Aassi ee lobes, sharply and sometimes doubly serrate 
with, tk ; . petiole, with straight glandular teeth; unfolding © 
aes , “ Opening of the flowers and then pubescent above and 
«below with thick hoary tomentum; at maturity membra- 
- Raceous, dark yellow 
aay cert on the lower surface, 3 to 4 in. long, 2% to 3 in. 
remote Slender midribs slightly impressed above and thin 
cs sl 
‘Petioles jy Veins extending to the points of the lobes; 
Stender, at first tomentose, ultimately pubescent, 1 to 
