Crataegus monogyna, Jacq.

14. C. monogyna Jacq. View in CoL , FI. Austr. 3: 50 (1775)

( C. oxyacantha L. , nom. ambig.).

Shrub or small tree up to 10 m; spines 7- 20 mm. Leaves obovate to rhombic, cuneate, discolorous; lobes 3-7, oblong, acute or subobtuse, entire or sparsely toothed near the apex, extending | of the way to the midrib, the sinuses usually open and deep; stipules entire, lanceolate-subulate. Flowers 8-15 mm in diameter. Style 1. Fruit 6-10 mm, dark or bright red, crowned by deflexed sepals which are usually slightly longer than wide; pyrene 1. Hedges and thickets. Almost throughout Europe except the northern and eastern margins. All except Az Fa Is Rs (N, B, E) Sb.

A variable species. The taxa here included in C. monogyna have been variously treated by different authors.

1 Twigs and leaves densely pubescent (f) subsp. azarella 1 Twigs and leaves glabrous or sparsely pubescent

2 Leaves coriaceous, ± glaucous or glaucescent beneath

3 Leaves 30-50 mm; petiole 15-30 mm; fruit brownish-red

(c) subsp. leiomonogyna

3 Leaves 10-30 mm; petiole 3-15 mm; fruit bright red, slightly pruinose while young (d) subsp. brevispina

2 Leaves slightly coriaceous, greyish or light green beneath

4 Leaves up to 20 mm; flowers 8-10 mm in diameter (e) subsp. aegeica

4 Leaves more than 20 mm; flowers 10-15 mm in diameter

5 Leaves (3-)5- to 7-lobed, large; petiole 20-25 mm; hypanthium villous (a) subsp. nordica

5 Leaves deeply 3(-5)-lobed, small; petiole 5-15 mm; hypanthium glabrous (b) subsp. monogyna