Rubus in New Jersey

(these are just my notes; I am not an expert)
In New Jersey we have:

Wineberry (R. phoenicolasias): fuzzy red stems

Black raspberry (R. occidentalis): blue-gray, round stems

(Red raspberry) (R. idaeus) (mostly north of NJ): blue-green or red-green, round stems

Cut-leaved blackberry (R. laciniatus): deeply lobed leaflets

Sand blackberry (R. cunefolius): wedge-shaped, smallish leaflets

Purple flowering raspberry (R. odoratus): leaves not divided, currant or maple-like

Common dewberry (R. flagellaris): trailing with prickles on stems, dull leaves

Swamp dewberry (R. hispidus): trailing with bristles and some prickles on stems, shiny leaves

Common blackberry (R. allegheniensis): fluted stems, flowers in clusters of more than 12, in a raceme, glandular flowerstalks

Pennsylvania blackberry (R. pensylvanicus): fluted stems, flowers in clusters of fewer than 12, not very glandular, not always a raceme and if so a short one.

note: in separating the raspberries: R. idaeus has pinnately compound leaves (you'll see this on the new growth)
while R. occidentilis is virtually always trifoliate.

And obviously the fruit of R. idaeus is red and of R. occidentalis is black.

由使用者 srall srall2023年09月19日 17:32 所貼文

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Thanks so much for this!

發佈由 trumpetchris 10 個月 前

Great summary. Thanks!

發佈由 joekaz 10 個月 前

Great post. Thanks for sharing the info. Rubus are challenging and it's great to have more insights and field id characters.

It's possible Rubus caesius (European Dewberry), Rubus armeniacus (Armenian
Blackberry), Rubus dalibarda (Dewdrop), Rubus pubescens (Dwarf Raspberry) and Rubus bifrons (Himalayan Blackberry) also occur in New Jersey.

發佈由 danielatha 10 個月 前

Well, I was focusing on ones I've photographed...R. armeniacus and R. bifrons can be really challenging when separating "blackberries".

發佈由 srall 10 個月 前

Thanks for this, Sara!

發佈由 sadawolk 10 個月 前

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