JOURNAL 



OF THE 



ARNOLD ARBORETUM 



Volume III JULY, 1921 Number 1 



NOTES ON NORTH AMERICAN TREES, IX 1 



C. S. Sargent 



NEW SPECIES AND VARIETIES OF CRATAEGUS 



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



Leaves oblong-obovate, rounded or acute at apex, gradually narrowed 

 and cuneate at base, finely, often doubly serrate usually only to the 

 middle with acute teeth thickened at apex, glabrous with the exception 

 of a few hairs on the upper side of the midrib early in the season, thin, 

 dark green and lustrous above, paler below, 3.5-4 cm. long, 1.5-2 cm. 

 wide, with a slender midrib and thin obscure primary veins, on vigorous 

 leading shoots usually acute at apex, often acutely lobed above the middle, 

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

 nearly to the base, glabrous, 5-7 or on vigorous shoots up to 10-12 mm. 

 in length. Flowers opening early in April, 10-12 mm. in diameter, on 

 slender glabrous pedicels, in 5-7-flowcred globose glabrous corymbs; calyx- 

 tube narrow-obconic, glabrous, the lobes slender, gradually narrowed 

 from the base, long-acuminate, entire or slightly and irregularly toothed 

 above the middle, glabrous; stamens 10, anthers red; styles 1-3, usually 

 2. Fruit ripening late in September, ellipsoidal, dull orange-red, 10 mm. 

 long, 6-7 mm. thick, the persistent calyx sessile or raised on a short tube; 

 nutlets narrowed and rounded at the ends, only slightly ridged on the 

 back, 6-8 mm. long and 3-5 mm. wide, the narrow hypostyle extending 



to below the middle. 



A small tree with dark slightly scaly bark and slender glabrous often 

 distinctly zigzag branchlets red-brown or orange-brown during their 

 first year, later becoming dark gray-brown, and armed with numerous 

 straight slender spines 3-4 cm. in length. 



Texas. Cherokee County, upland thickets near Larissa, E. J. Palmer, 

 No 9371 (2), April 7, 1916, type for flowers, No. 10704 (2), September 14, 1916, 

 type for fruit, No. 9372 (2 A), April 7, 1916, (with pink anthers) No. 10705 (2 A), 

 September 14, 1916. 



l For part VIII see vol. II p. 164. 



