tOi 



JOURNAL OF THE ARNOLD ARBORETUM [vol. hi 



1 



glabrous, glandular, 8-10 mm. in length; leaves at the end of vigorous 

 shoots ovate, long-pointed and acuminate at apex, rounded at the wide 

 base, acutely lobed above the middle, more coarsely serrate, thick and 

 coriaceous, more lustrous on the upper surface, up to 5 cm. long and 4.5 

 cm. wide, their petioles stout, broad wing-margined nearly to the base, 

 6 or 7 mm. long. Flowers appearing early in April, about 1.5 cm. in 

 diameter, on slender pedicels covered with long white hairs, in 1- to 

 5- usually 3-flowered narrow densely villose corymbs with narrow oblong- 

 ovate glandular-serrate slightly villose bracts and bractlets; calyx-tube 

 narrow-obconic, villose, the lobes foliaeeous, narrow, elongated, acumin- 

 ate, laciniately glandular-serrate, slightly villose; stamens 20; anthers 

 white; styles 4 or 5. Fruit ripening in October, on villose pedicels, in 

 1- or 2-fruited clusters, subglobosc to slightly obovoid, orange-red, 

 1.2 cm. in diameter, the calyx little enlarged with a deep narrow cavity 

 pointed in the bottom and spreading and closely appressed lobes; flesh 

 thin and dry; nutlets 4 or 5, thin and rounded at the ends, rounded and 

 only slightly ridged on the back, 1-1.1 cm. long and 5 mm. wide, the 

 narrow dark hypostyle extending to the middle. 



"A small symmetrical tree with erect or spreading branches, bark 

 ashy gray and shallowly furrowed" with stout nearly straight unarmed 

 branchlets light yellow-green and conspicuously covered early in their 

 first season with matted pale hairs, becoming nearly glabrous and dull 

 red-brown at the end of their first season and dark gray-brown the follow- 

 ing year. 



Florida. ColumbiaCounty, Lake City, in dry sandy soil, T. G. Harbison 

 No. 12, June 23, 1917, Nos. 5687 (type) and 5687a, April 11 and October 8, 1920. 



This plant is doubtfully referred to the Uniflorae. From the other 

 species of that Group it differs in the broad-ovate coriaceous leaves on 

 vigorous shoots, the more numerous-flowered corymbs, spineless branches 

 and in its arborescent habit. Mr. Harbison who discovered it thought at 

 one time that it might belong to the Flavae Group. "This," he writes, 

 "is one of the most distinct looking of the genus. When I first saw it 

 I was inclined to think that it might be a hybrid. In general appearance 

 it does not suggest the Flavae Group. The sepals look like those of some 

 of the Uniflorae, and the fruit is firm like the fruit of most of the species 

 of that group." 



Crataegus Croomiana (§ Uniflorae), n. sp. 



Leaves obovate to rhombic, acute at apex, gradually narrowed and 

 cuneate at base, coarsely serrate above the middle with rounded or acute 



teeth; roughened above early in the season by short white hairs, and 

 sparingly villose below especially on the slender midrib and obscure 

 primary veins, and at maturity thin, blue-green and slightly roughened 

 above, paler and nearly glabrous below, 2.5-3 cm. long and 1.5-2 cm. wide; 

 petioles slender, slightly winged at apex by the decurrent blade, densely 



