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Montana Field Guide

Montana Field Guides

Black Henbane - Hyoscyamus niger

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

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General Description
Annual or biennial. Stems erect, usually branched, 25–100 cm. Herbage viscid-villous, especially on the stems and veins, malodorous, poisonous. Leaves winged-petiolate below to sessile above; blades ovate, 3–30 cm long, pinnately lobed to dentate, overlapping. Inflorescence a branched, leafy-bracted raceme. Flowers slightly irregular; calyx campanulate, 10–12 mm long, greatly expanded in fruit; corolla funnelform, yellowish with purple veins, the tube 15–30 mm long, the limb 20–25 mm wide with 5 unequal lobes. Fruit a globose capsule 1–2 cm long, enclosed by the veiny, glandular calyx (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Unknown/Undetermined
 


Range Comments
Introduced throughout much of temperate N. America; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 34

(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

References
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Citation for data on this website:
Black Henbane — Hyoscyamus niger.  Montana Field Guide.  .  Retrieved on , from