240 POMACEAE. [Vor. Il. 
Leaves ovate, broadly oval or nearly orbicular in outline. 
Foliage, pedicels and calyx glabrous or nearly so. 
Leaves mainly truncate or cordate at the base, lobed. 4. C. cordata. 
Leaves narrowed or wedge-shaped at the base. 
Leaves much incised; styles 1-3. 5. C. Oxyacantha, 
Leaves serrate or but little incised; styles mostly 5. 6. C. viridis. 
Lower surfaces or teeth of the leaves, pedicels and calyx pubescent or gland-bearing. 
Leaves deeply pinnately incised; pome 3'’ long. 7. C. apitfolia. 
Leaves serrate or lobed, not deeply incised; pome 4'’-12'' long. 
Leaves glabrous or nearly so, their teeth mostly tipped with small glands. 
Leaves, or most of them, truncate or cordate at the base. 8. C. coccinea. 
Leaves, or most of them, narrowed at the base. 
Fruit subglobose, pyriform or oval, 5’’-7'’ in diameter; bractlets and calyx 
densely glandular. 9. C. rotundifolia. 
Fruit globose, 3''-4’’ in diameter; bractlets and calyx somewhat glandular. 
10. C. macracantha, 
Leaves pubescent, especially along the veins beneath. 
Leaves broadly ovate, truncate or cordate at the base; flowers 1’ broad. 
11. C. mollis. 
Leaves oval, narrowed at both ends; flowers 6'’-8'' broad. 12. C. /omentosa. 
Corymbs 1-7-flowered. 
Calyx-lobes not incised; petioles and leaf-serrations very glandular. 13. C. flava. 
Calyx-lobes deeply incised; petioles and leaf-serrations little or not at all glandular. 
Leaves obovate or spatulate, obtuse. 14. C. uniflora. 
Leaves oval, mostly acute at both ends. 15. C. Vailiae. 
1. Crataegus Cras-GalliL. Cockspur’ Thorn. Newcastle Thorn. (Fig. 1991.) 
\ Crataegus Crus-Gallil,. Sp. Pl. 476. 1753. 
A shrub or small tree, with maximum 
| height of about 30° and trunk diameter 
of 1°, the branches spreading. Thorns 
numerous, slender, 2’-4’ long; leaves 
coriaceous, shining aboye, dull beneath, 
glabrous on both sides, obovate or ob- 
lanceolate, obtuse or abruptly acumi- 
nate at the apex, very cuneate at the 
base, 1-2’ long, sharply and somewhat 
irregularly serrate; corymbs many-flow- 
ered, terminating short branches; pedi- 
cels and calyx glabrous; flowers about 
6’ broad; calyx-lobes linear-lanceolate; 
styles usually 1-3; fruit globose or 
slightly pear-shaped, about 3’’ long. 
In thickets, western Quebec to Mani- 
toba, south to Florida and Texas. Wood 
hard, satiny, reddish brown. Weight per 
cubic foot 45 lbs. May-June. 
2. Crataegus spathulata Michx. Small- 
fruited Haw. (Fig. 1992.) 
Mespilus Azarolus Marsh. Arb. Am. 88. 1785. Not 
C. Azarolus I,. 1753. 
Crataegus spathulata Michx. F1. Bor, Am. 1: 288. 1803. 
A shrub or small tree, sometimes reaching a height 
of 25° and trunk diameter of 10’. Spines 1/-2 long; 
leaves fascicled near the ends of short branches, cori- 
aceous, shining above, rather dull beneath, glabrous 
on both sides, spatulate, obtuse and crenate or with 
2-3 lobes at the summit, entire and narrowly cune- 
ate at base, almost sessile, 1’ long, or those of the 
sterile branches often larger; cymes terminating 
short branches, many-flowered; pedicels and calyx 
glabrous; flowers about 4’’ broad; calyx-lobes ovate; 
styles commonly 5; fruit red, globose, or oval-glo- 
bose, 2’/-3/’ long. 
In thickets, Virginia to Florida, west to Missouri and 
Texas. Wood hard, reddish brown. Weight per cubic 
foot 45 lbs. May-June. 
a 
