Slowing to sniff sweet rocket, subtle catmint, stinky hawhorn

They catch your eye

Once you catch a whiff, your nose may know them as well

Tis the season of white trees, purple groundcover and phlox-like patches along the road.

Hawthorn trees (Crataegus species) and catmint (Nepeta species) are common highway plantings because they're attractive and tolerant of roadside conditions -- pollution, heat and drought.

There are plenty of hawthorns along our roadways. Some are deliberately planted (such as English Crataegus laevigata, and the native Washington- and cockspur hawthorns, C. phaenopyrum and C. crus-galli) and many find their own way in from nearby natural areas (downy-, dotted- , glossy- and frosted hawthorns, C. mollis, C.punctata, C. nitida, C. pruinosa).

There are plenty of hawthorns along our roadways. Some are deliberately planted (such as English Crataegus laevigata, and the native Washington- and cockspur hawthorns, C. phaenopyrum and C. crus-galli) and many find their own way in from nearby natural areas (downy-, dotted- , glossy- and frosted hawthorns, C. mollis, C.punctata, C. nitida, C. pruinosa).

The hawthorns' dense crowns help with noise suppression.

There's an Old World saying, "It's bad luck to approach a hawthorn tree at night." To that, we pose a New World saying, "Duh, you think?!" (Below, cockspur hawthorn leaf and thorn, C. crus-galli)

Catmints' ground-smothering habit helps control roadside weeds. If your window's open and traffic's slow you might catch the hawthorn flowers' scent, which can be somewhat fetid. Perhaps the catmint's more pleasant smell will make up for it.

Sweet rocket (Hesperis matronalis, also known as dame's rocket) is an Old World import that escaped to the New World wilds. It's biennial and its seed readily colonizes almost any kind of disturbed ground. Sweet refers to its fragrance, most notable late in the day, and dame to its historic medicinal uses for "female troubles."

Some people call it wild phlox based on its stature and flower form, although sweet rocket is a 4-petal mustard family member, not related to the 5-petal tall phlox gang.

Related links

Catmint Nepeta species