Keyed Out #100 — Rosa rugosa

Question 1

Five separate petals sit above a ring of many free {stamens}, and all of them spring from the rim of a fleshy cup that encloses the ovaries.

Accepted Answer

rose family

Question 2

Leaves are set singly up the stem and divided into five to nine toothed {leaflets}, and the base of each {petiole} carries a pair of narrow leafy wings welded along its length.

Accepted Answer

Rosaceae

Question 3

Slice the ripe scarlet fruit across and it proves hollow, a fleshy shell 0.75 to 1.2 inches (2 to 3 cm) wide lined on the inside with dry, bristle-coated, one-seeded {achenes} rather than packed with solid pulp.

Accepted Answer

Rosa

Question 4

The stems are crowded with straight spikes 0.1 to 0.4 inches (3 to 10 mm) long that grow out of the bark itself, carry no internal plumbing, and shear off sideways under a thumbnail.

Accepted Answer

Rosa

Question 5

Its {leaflets} are thick and leathery, so deeply puckered between sunken veins that they look quilted, and grey-downy on the underside, not flat, smooth and hairless on both faces.

Accepted Answer

Rosa rugosa

Question 6

It opens flush after flush of bloom from early summer to frost, so by late summer fresh open flowers and fully coloured ripe fruit hang on the same stem, rather than a single spring flush finished long before the fruit colours.

Accepted Answer

Rosa rugosa