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Small-leaf Angelica - Angelica pinnata
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Native Species Global Rank :
G5
State Rank :
S3S4
(see State Rank Reason below)
C-value :
4
Agency Status USFWS :
USFS :
BLM :
External Links
State Rank Reason (see State Rank above)
Angelica pinnata is apparently fairly common in southwest Montana where is has been documented in Beaverhead, Madison, Gallatin, and Park counties. Many observations have been made in northwest and west-central Montana, but are likely mis-identified Angelica arguta. Additional data on properly identified specimens is needed to accurately track the status of this plant.
Details on Status Ranking and Review
Range Extent
Score E - 5,000-20,000 sq km (~2,000-8,000 sq mi)
Area of Occupancy
Score D - 6-25 4-km2 grid cells
Number of Populations
Score C - 21 - 80
Number of Occurrences or Percent Area with Good Viability / Ecological Integrity
Score B - Very few (1-3) occurrences with excellent or good viability or ecological integrity
Environmental Specificity
Score C - Moderate. Generalist or community with some key requirements scarce
Threats
Score D - Low
Comment No known threats.
General Description
Stems erect, 30–80 cm. Herbage glabrous. Leaves once-pinnate to subbipinnate; leaflets lanceolate, 2–8 cm long, serrate; only the lowest sometimes lobed. Umbels: rays unequal, 1–6 cm long; involucre and involucel absent. Flowers white to pink; petals ca. 1 mm long. Mericarps glabrous, elliptic, 3–5 mm long; lateral ribs broadly winged; dorsal ribs barely winged (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Species Range
Montana Range
Range Descriptions
Native
Range Comments
MT south to UT and NM (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Observations in Montana Natural Heritage Program Database
Number of Observations: 42
(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
Ecology
Recent phylogenetic research suggests that the ancestors of Angelica pinnata colonized North America from northeast Asia during the Miocene, between 10 million and 7 million years ago. Sea levels were much lower then, and Angelica crossed over the Bering Land Bridge (Liao et al. 2012).
Reproductive Characteristics
Flowers: Petals are white to pink and roughly 1 millimeter long (Lesica et al. 2012).
Fruit: The fruit may be hairless or minutely hairy and is 3-5 millimeters long (Goodrich 1986; Lesica et al. 2012). It consists of two united halves (mericarps), which are compressed parallel to their common face (Hitchcock and Cronquist 1973). The mericarps are elliptical and have broad, 1 millimeter-wide wings at their edges, as well as less prominent (0.5 mm) dorsal ribs (Lesica et al. 2012; Goodrich 1986).
(Contribution of Lesica et al. adapted from
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX )
Management
A synthesis of multiple experiments showed that the carrot family (Apiaceae) ranks high among studied plant families in attractiveness to, and increased longevity for, adult parasitoid wasps - insects which can play an important role in limiting pest populations (Russell 2015). Plants in the carrot family have flowers with relatively accessible nectar, a trait which researchers note seems to be generally important for parasitoid wasps (Russell 2015).
Stewardship Responsibility
References
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