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Montana Field Guide

Montana Field Guides

Green Ash - Fraxinus pennsylvanica


Global Rank: G5
State Rank: S5

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

External Links






 
General Description
Dioecious tree to 12 m with an open crown and spreading branches. Bark dark gray, shallowly furrowed; twigs green to brown. Leaves opposite, petiolate, ovate in outline, odd-pinnate with 5 to 7 leaflets; leaflets short-petiolate, lanceolate, serrate, 5–12 cm long, mostly glabrous. Inflorescence a panicle, appearing before the leaves. Flowers unisexual; calyx 1–1.5 mm long, cup-like with 4 shallow lobes; corolla absent; male flowers with 2 stamens, 2–4 mm long; female flowers with 2 aborted stamens and 1 pistil; ovary superior; stigma 2-lobed. Fruit a 1-seeded oblong, flattened, distally-winged samara, 2–4 cm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
MT to QC south to TX, LA and FL (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 50

(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
Along rivers, streams, ephemeral drainages, cool north-facing slopes; plains(Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Green Ash — Fraxinus pennsylvanica.  Montana Field Guide.  .  Retrieved on , from