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Montana Field Guide

Montana Field Guides

Prickly Rose - Rosa acicularis
Other Names:  Rosa sayi


Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Stems lax, 50–150 cm, densely to sparsely covered with fine, straight prickles; those at nodes similar. Leaves with 5 to 7, narrowly elliptic leaflets, pubescent on veins beneath,1.5–5 cm long; the rachis glabrate to glandular-pubescent; Flowers mostly solitary; hypanthium glabrous, 3–6 mm long; sepals 15–20 mm long, spreading, dilated at the tip, puberulent, sometimes stipitate-glandular, persistent in fruit; petals 15–30 mm long. Hip globose to pyriform, 1–2 cm long, reddish-purple (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Montana plants are subspecies sayi (Schwein.) W.H. Lewis.

Species Range
Present
 


Range Comments
Circumboreal south to BC, CO, NE, MN and VT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 135

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Moist to wet coniferous forest; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Prickly Rose — Rosa acicularis.  Montana Field Guide.  .  Retrieved on , from