152 . Rhodora [May 
the lower surface, 4-5 cm. long, 3.5-4.5 cm. wide, with slender yellow 
midribs deeply impressed above and very thin primary veins extend- 
ing obliquely to the points of the lobes; petioles slender, slightly 
grooved, often wing-margined at the apex by the decurrent bases of 
the leaf-blades, 1.5-2.5 cm. long; stipules linear, acuminate, glandu- 
lar, caducous ; on leading shoots leaves sometimes 5—6. cm. long and 
nearly as wide as long, more deeply lobed than the leaves of fertile 
branchlets, their petioles stout, wing-margined to below the middle, 
conspicuously glandular, often rose color. Flowers r.8-2 cm. in 
diameter on long slender pedicels, in broad thin-branched many- 
flowered compound glabrous corymbs; bracts and bractlets linear to 
oblong-obovate, glandular, caducous; calyx-tube broadly obconic, 
the lobes gradually narrowed from broad bases, acuminate, entire or 
rarely sparingly serrate near the middle, glandular and reddish at 
the apex; stamens 20, rarely 15-18 ; anthers large, dark rose color; 
styles 4 or 5, surrounded at the base by a broad ring of pale tomen- 
tum. Fruit in many-fruited erect or drooping clusters, subglobose 
to short-oblong, full and rounded at the ends, scarlet, lustrous, 
marked by numerous large pale dots, 1-1.2 cm. in diameter; calyx 
prominent, sessile, with a broad deep cavity and nearly entire 
appressed lobes, dark red on the upper side near the base and 
generally persistent on the ripe fruit; flesh thin, juicy, pale yellow ; 
nutlets 4 or 5, usually 5, thin, acute at the ends, slightly or promi- 
nently ridged on the back, about 7 mm. long. 
A broad round-topped shrub 3-5 m. in height, sometimes beginning 
to flower when less than 1 m. tall, with numerous stout stems covered 
with smooth gray bark, and slender branchlets marked by many 
small pale lenticels, dull red-brown when they first appear, bright 
red-brown and lustrous during their first season, dull gray-brown the 
following year, and ultimately ashy gray and armed with stout 
slightly curved often blunt spines 2—4 cm. in length. Flowers about 
May 20. Fruit ripens from the roth to the middle of September and 
soon falls. 
MASSACHUSETTS: Open rocky pastures in moist soil, Clinton, 
Stirling, West Boylston, Evelyn Forbes Thayer, May and September 
1901 and 19o2. Connecticut: In a hedge on Harris Court, New 
London, C. E. Graves, May and September 1902, C. .S. Sargent, 
August 1902. 
'The maiden name or Mrs. John E. Thayer, an industrious collector 
and student of Crataegus growing in her native County of Worcester, 
Massachusetts, may properly be associated with this handsome plant, 
one of several undescribed forms which she has helped to make 
known. 
