Angiosperms (Flowering Plants) • Earth.com

Phipps' Hawthorn

(Crataegus phippsii)

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Description

This tree or large shrub is 16 to 23 feet (5-7 m) tall, with a main trunk that sends out shoots. The young twigs are dark purple-brown and densely covered with short hairs. The older branches are dark gray with rather sparsely spaced brown to black somewhat thin and recurved thorns that are - to 1- in. (2-4 cm) long. The deciduous foliage is borne on pubescent leaf-stalks - to - in. (1.5-2.0 cm)long. The somewhat leathery leaves are broadly ovate with 3 somewhat rounded to angled shallow lobes per side with shortly appressed hairs on the upper surface, and short hairs especially along the veins below. The leaf blades are 1- to 3 1/8 in. (4-8 cm)long. The margins are shortly toothed with about 5 secondary veins per side. The inflorescence is a flattened panicle (branched with flowers maturing from the bottom upwards) densely covered with short hairs, with 6 to 12 flowers that are 2/3 to 1 in. (15-22mm) diameter, gland-margined, and subtended by linear bracts.The calyx lobes are broadly triangular and pubescent away from the axis, especially below; and the margins are cut into irregularlobes. The cup-shaped extension of the floral axis (hypanthium) is densely hairy on the outer surface, while the inside is hairless but bristly toward the center. The petals are ovate, and there are 10 stamens with pale pink anthers. The fruit is - in. (12 mm) in diameter, ovoid to broadly flask shaped, covered with short hairs,and ripening from shades of red toward deep purple to black in color. The calyx lobes are reflexed on the ripe fruit. The 2 to 4 seeds are shallowly ridged on the lower surface.

Taxonomic tree:

Domain:
Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Order:Rosales
Family:Rosaceae
Genus:Crataegus
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