Humulus japonicus

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:CANNABACEAE
Species:Humulus japonicus Siebold & Zucc.
Common Name:Japanese Hops
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:HUJA
Plant Notes:Japanese Hops is an introduced annual vine in the Hemp family (Cannabaceae). It is native to East Asia. In Alabama it can be found in the northern third of the state. Japanese Hops occurs along rivers and streams, along railroad tracks, near old home sites, and in other moist, disturbed habitats. It is an annual with a tap root. Stems are twining or sprawling, green or purple streaked, 4-angeld, and armed with stiff 2-branched stalked hairs that aid in climbing. Stems can reach lengths of 35 feet. Leaves are opposite, petiolate, palmately 5-9 lobed, pubescent with stiff hairs on the upper surface and along the veins on the lower surface, and with serrate margins. The petiole is usually longer than the blade and pubescent with prickly hairs. Flowers are produced in the axils of the leaves. Male and female flowers occur on separate plants (dioecious). Female flowers occur in cone-shaped clusters that hang down and male flowers occur in upright panicles. The female inflorescence consists of several overlapping bracts that are green or purplish in color, pubescent, with densely hairy margins. A pair of inconspicuous female flowers without petals is located at the base of each bract. Male flowers consist of 5 greenish or purplish sepals, no petals, and 5 anthers. The fruit is an ovoid, yellow-brown achene. Japanese Hops is a larval food source for Gray Hairstreak (Strymon melinus), Eastern Comma (Polygonia comma), Question Mark (Polygonia interrogationis), and Red Admiral (Vanessa atalanta) butterflies. Japanese Hops is listed as an invasive species in the United States.—A. Diamond
Taxonomic Notes:**
Status:Not Native
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyCANNABACEAE - Hemp family
Genus Humulus
Species Humulus japonicus Siebold & Zucc. - Japanese Hops

Citation

Citation Humulus japonicus Siebold & Zuccarini, Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. 4(3): 213. 1846.
Basionym: **
Type: **

** Not applicable or data not available.

Synonyms

No synonyms exist for this species.

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Calhoun, Cullman, Jefferson, Marshall, Shelby, Talladega

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AMAL, AUA, JSU, SAMF, TROY, UNA, UWAL

Range of years during which specimens were collected: -

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
AUA_ACC_63929 Calhoun 18 Sep 2003 Spaulding, Daniel D.
12051		 AUA
Humulus Japonicus Sieb. & Zucc.
UNA00059300 Calhoun 31 Jul 2002 Spaulding, Daniel D.
11497		 UNA
Humulus japonicus Sieb. & Zucc.
JSU116141 Calhoun 17 Aug 1986 Lawler, Carol L.
1015		 JSU
Humulus japonicus Siebold & Zuccarini
ALNHS00007404 Calhoun 05 AUG 2021 Barger, T. Wayne
SP#5578		 ALNHS
Humulus japonicus Sieb. & Zucc.
UWAL0050551 Talladega 21 Aug 2018 Spaulding, Daniel D.
15608		 UWAL
Humulus japonicus Sieb. & Zucc.
ALNHS00004021 Calhoun 17 Aug 2016 Barger, T. Wayne
SP#2364		 ALNHS
Humulus japonicus Sieb. & Zucc.
AUA_ACC_72940 Jefferson 27 Aug 2011 Davenport, L.J.
4829		 AUA
Humulus Japonicus Sieb. & Zucc.
UNA00063067 Calhoun 18 Sep 2003 Spaulding, Daniel D.
12051		 UNA
Humulus japonicus Sieb. & Zucc.
TROY000035189 Jefferson 27 Aug 2011 Davenport, Lawrence J.
4829		 TROY
Humulus japonicus Siebold & Zuccarini
UNA00059449 Shelby 23 Sep 2000 Spaulding, Daniel D.
10932		 UNA
Humulus japonicus Sieb. & Zucc.
SAMF0002154 Jefferson 27 Aug 2011 Davenport, Lawrence J.
4829		 SAMF
Humulus japonicus Siebold & Zuccarini
UNA00031056 Cullman s.d. Mohr, Mary
s.n.		 UNA
Humulus japonicus Sieb. & Zucc.
JSU116144 Shelby 23 Sep 2000 Spaulding, Daniel D.
10932		 JSU
Humulus japonicus Siebold & Zuccarini
JSU116142 Calhoun 30 Jul 1986 Lawler, Carol L.
863		 JSU
Humulus japonicus Siebold & Zuccarini
ALNHS00007403 Calhoun 05 AUG 2021 Barger, T. Wayne
SP#5578		 ALNHS
Humulus japonicus Sieb. & Zucc.
AMAL00022315 Jefferson 27 Aug 2011 Davenport, Lawrence J.
4829		 AMAL
Humulus japonicus Siebold & Zuccarini
AMAL00006208 Calhoun 31 Jul 2002 Spaulding, Daniel D.
11497		 AMAL
Humulus japonicus Siebold & Zuccarini
UWAL0008739 Jefferson 27 Aug 2011 Davenport, L.J.
4829		 UWAL
Humulus japonicus Siebold & Zuccarini
JSU116143 Marshall 30 Aug 1992 Spaulding, Daniel D.
2789		 JSU
Humulus japonicus Siebold & Zuccarini
JSU116147 Calhoun 6 May 1986 Lawler, Carol L.
317		 JSU
Humulus japonicus Siebold & Zuccarini
TROY000051648 Jefferson 13 Sep 2020 Diamond, Alvin R.
29447		 TROY
Humulus japonicus Siebold & Zuccarini
UNA00072929 Jefferson 27 Aug 2011 Davenport, Lawrence J.
4829		 UNA
Humulus japonicus Sieb. & Zucc.
AMAL00008520 Calhoun 18 Sep 2003 Spaulding, Daniel D.
12051		 AMAL
Humulus japonicus Siebold & Zuccarini
JSU116080 Calhoun 24 Aug 1982 Whetstone, R. David
11972		 JSU
Humulus japonicus Siebold & Zuccarini
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