4 JOURNAL OF THE ARNOLD ARBORETUM [vol. hi 



A tree 8 or 9 m. high with a trunk 18-20 cm. in diameter covered with 

 gray bark divided by shallow fissures, spreading pale ashy gray branches 

 forming a broad round-topped head, and slender branchlets sparingly 

 villose, soon glabrous, and dark red-brown in their first season, becoming 

 lighter in their second year and ultimately gray, and armed with occa- 

 sional slender straight spines 2.5-3 cm. in length. 



Florida. Wakulla County, in the water of deep swamps and in low wet 

 woods near St. Marks, T. G. Harbison, Nos. 1206 and 1208, September 25, 1913, 

 No. 1428, March 30, 1914, No. 5G92, April 13, 1920 (type), No. 5697, April 14, 

 1920, with glabrous corymbs and young branchlets. 



A plant of the Crus-galli Group growing in wet soil has not before 

 been reported. The small flowers in small compact corymbs, the small 

 ellipsoidal fruit and slender branches well distinguish this species. Crus- 

 galli species are rare in the coast region of the southeastern states, and 

 from Florida only C. pyracanthoides Beadle with 5-10 stamens has been 

 previously described. 



Crataegus sublobulata (§Crus-galli), n. sp. 



Leaves broad-obovate to elliptic, acute or rounded at apex, abruptly 

 or gradually narrowed and cuneate at base, coarsely, deeply and irregu- 

 larly serrate with acuminate teeth, and often sublobulate with acuminate 

 lobules, tinged with red and covered above with short white hairs de- 

 ciduous before the flowers open except from the upper side of the midrib, 

 glabrous at maturity, thick, dark green and lustrous on the upper sur- 

 face, paler on the lower surface, 3.5-4 cm. long, 2.5-3 cm. wide, with a 

 stout midrib and prominent primary veins, or on vigorous shoots often 

 4-5 cm. long and 3.5 cm. wide; petioles stout, wing-margined often nearly 

 to the middle, grooved and villose-pubescent on the upper side, 1-1.2 

 cm. or on leading shoots up to 2 cm. in length. Flowers opening late in 

 March and early in April, 1.5 cm. in diameter, on slender glabrous pedi- 

 cels, in 5- or 6-flowered compact corymbs; calyx-tube narrow-obconic, 

 glabrous, the lobes slender, acuminate, entire or furnished above the 

 middle with occasional slender teeth, glabrous on the outer surface, 

 sparingly villose-pubescent on the inner surface; stamens 20; anthers 

 pink; styles 2-5. Fruit short-oblong to subglobosc or rarely to obovoid, 

 orange-red, 8-10 mm. long and 6 or 7 mm. broad; nutlets usually broader 

 at apex than at base, prominently ridged on the back, 5-7 mm. long and 

 3-5 mm. wide, the broad hypostyle extending to below the middle and 

 often nearly to the base. 



A round-topped tree 8-10 m. high, with a short trunk covered with 

 soft corky slightly ridged gray-brown bark, wide-spreading branches 

 and slender slightly zigzag branchlets light reddish brown and glabrous 

 when they first appear, becoming darker during their first season and 

 light gray-brown the following year, and armed with numerous slender 

 straight chestnut-brown lustrous spines, becoming dull gray-brown and 

 2.5-4 cm. in length. 



