Overview
Interesting Facts
Common Names
Click on the language to view common names.
Common Names in Chinese:
Lü Cao
Common Names in English:
Japanese Hop, Kana-Mugura
Common Names in French:
Houblon Du Japon, Houblon Japonais, Houblon Ornemental
Common Names in Hungarian:
Japán Komló
Common Names in Italian:
Luppolo Del Giappone
Common Names in Japanese:
Kana Mugura, Kana-Mugura
Common Names in Portuguese:
Lúpulo (Brazil)
Description
Family Cannabaceae
Herbs, annual
or perennial
, erect
or twining
, dioecious or sometimes monoecious, often with cystoliths
(a hard calcium carbonate
structure at base
of a hair) . Stems furrowed
or winged
. Stipules free
. Leaves alternate or opposite, palmately lobed
or compound
, sometimes simple
. Male inflorescences a bracteate
cymose
panicle. Male flowers: pedicellate
; sepals 5, free; petals absent; stamens 5, opposite sepals; filaments
short; anthers
2-loculed, dehiscent
by longitudinal
slits. Female inflorescences a bracteate spicate cyme much reduced in Cannabis, pendent or erect. Female flowers: sessile; calyx appressed
to ovary, membranous; petals absent; ovary 1-loculed; ovule solitary, pendulous from locule apex; style 2-parted, branches filiform
. Fruit an achene, covered by persistent
calyx; endosperm fleshy
; embryo curved
or spirally involute
.
Two genera and four species: N Africa, Asia, Europe, North America; two genera and four species (one endemic) in China.
Because all the Chinese species in this family
are cultivated and are often found naturalized
in disturbed
habitats
, it is difficult to know the true wild distributions.
Cannabaceae has sometimes been included
in Moraceae or Urticaceae but is now usually recognized as a distinct
family. The subfamily
Celtidoideae of Ulmaceae could possibly be included within Cannabaceae (see the discussion after the Ulmaceae family description
) .[1]
Genus Humulus
Herbs, taprooted annuals
or rhizomatous
perennials
, rightward-twining. Stems usually branched, armed
with rigid
2-branched, stalked
hairs
that facilitate climbing
. Leaves simple
; petioles
often twining
, with 2-branched hairs. Leaf blade
mostly cordate, palmately lobed
, sometimes unlobed; surfaces abaxially resin-dotted and×or gland-dotted. Inflorescences: staminate
inflorescences axillary
and terminal
, cymose
panicles, erect
to pendent, (10-) 20-100+-flowered, flowers small; pistillate
axillary, spikes or racemes
, flowers solitary or paired
, short-pedicellate, subtended by bracts and bracteoles. Staminate and pistillate flowers usually on different plants
. Achenes lenticular
or terete
, ensheathed by brownish or sometimes mottled
persistent
perianth; embryo coiled
. x
= 10.
Species 3: temperate
Northern Hemisphere.[2]
Physical Description
Species Humulus japonicus
Herbs, annual
, vining, 0.5-2.5 m.
Stems usually branched. Leaves:
petioles
usually longer
than blades
. Leaf blade cordate, palmately
5-9-lobed, 5-12 cm, margins
of lobes
serrulate
, apex acuminate; surfaces
abaxially with veins pubescent
, with stiff hairs
, glands
yellow,
sessile, discoid
, adaxially margins of younger leaf blades with stiff
cystolithic hairs. Inflorescences: staminate
inflorescences erect
,
15-25 cm, flower anthers
without glands; pistillate
inflorescences
spikes, conelike, ovoid
; bracteole ovate-orbiculate, 7-10 mm, pilose
,
margins densely ciliate-hairy. Infructescences
pendulous, green,
conelike, ovoid to oblong
, (1-) 1.5-3(-4) cm; bracteoles without
yellow glands. Achenes yellow-brown, ovoid-orbicular, inflated
to
lenticular
, 4-5 mm, glandless. 2 n = 20, including 6 chromosomes
concerned with sex determination. [source]
Variegated
forms of Humulus japonicus, cultivated as ornamentals
,
are sometimes spontaneous. The vernacular name Japanese hop(s) is
occasionally misapplied to H. lupulus var. cordifolius
(Miquel) Maximowicz, a variety not found in North America. [source]
The disposition of the name
Humulus scandens (Loureiro) Merrill,
based on Antidesma scandens Loureiro, is problematic. E. D.
Merrill (1935) was convinced that the name A. scandens applied
to the species Humulus japonicus. If Merrill was correct,
then the combination
Humulus scandens would have priority
.
The material
described by Loureiro, however, was not preserved, and
his description
does not coincide with that of H. japonicus. Humulus
scandens is not included
in synonymy
in this treatment. [source]
I. A. Grudzinskaya (1988) segregated Humulus japonicus as
a new monotypic genus, Humulopsis, with the single species Humulopsis
scandens (Loureiro) Grudzinskaya. [source]
Habit: Vine , Forb/herb
Flowers: Bloom Period: June. • Flower Color: green
Size/Age/Growth
Size: 6-8' tall.
Habitat
Roadsides, fencerows, waste places, riverbanks; 0-1000 m [3].
Typically found at an altitude of 0 to 1,919 meters (0 to 6,296 feet).[4]
Ecology: Invasive: introduced as a cultivated plant .
Biology
Reproduction
Duration: Annual , Perennial
Taxonomy
- Domain:
Eukaryota
(
)
- Whittaker & Margulis,1978
- eukaryotes
- Kingdom:
Plantae
(
)
- Haeckel, 1866
- Plants
- Subkingdom:
Viridaeplantae
(
)
- Cavalier-Smith, 1981
- Phylum:
Tracheophyta
(
)
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Subphylum:
Euphyllophytina
(
)
- Infraphylum:
Radiatopses
(
)
- Kenrick & Crane, 1997
- Class:
Magnoliopsida
(
)
- Brongniart, 1843
- Dicotyledons
- Subclass:
Rosidae
(
)
- Takhtajan, 1967
- Superorder:
Urticanae
(
)
- Takhtajan Ex Reveal, 1992
- Order:
Rosales
(
)
- Perleb, 1826
- Family:
Cannabaceae
(
)
- Augier, 1801 ex Martinov, 1820, nom. cons.
- hemp
- Subfamily:
Rhododendroideae
(
)
- Tribe:
Rhododendreae
(
)
- Genus:
Humulus
(
)
- C. Linnaeus, 1753
- Hop, houblon [Latin humulus, applied to hop plant]
- Specific epithet:
japonicus
- Sieb. & Zucc.
- Form:
shi. Taihoku, Formosa,
The Institute, 192
- Botanical name: - Humulus japonicus Sieb. & Zucc.
- Form:
shi. Taihoku, Formosa,
The Institute, 192
- Specific epithet:
japonicus
- Sieb. & Zucc.
- Genus:
Humulus
(
- Tribe:
Rhododendreae
(
- Subfamily:
Rhododendroideae
(
- Family:
Cannabaceae
(
- Order:
Rosales
(
- Superorder:
Urticanae
(
- Subclass:
Rosidae
(
- Class:
Magnoliopsida
(
- Infraphylum:
Radiatopses
(
- Subphylum:
Euphyllophytina
(
- Phylum:
Tracheophyta
(
- Subkingdom:
Viridaeplantae
(
- Kingdom:
Plantae
(
Synonyms
Humulus scandens auct. non (Lour.) Merr.
Notes
Name
Status: Accepted Name
.
Last scrutiny: 15-Mar-2000
Similar Species
Members of the genus Humulus
ZipcodeZoo has pages for 19 species, subspecies, varieties, forms, and cultivars in this genus:
H. japonicus (Japanese Hop) · H. japonicus 'Variegatus' (Variegated Japanese Hops) · H. lupulus (Common Hop) · H. lupulus americanus (Common Hop) · H. lupulus L. var. lupuloides E.Small (Arizona Hops) · H. lupulus L. var. neomexicanus A.Nelson & Cockerell (Common Hop) · H. lupulus var. lupuloides (Arizona Hops) · H. lupulus var. lupulus (Common Hop) · H. lupulus var. neomexicanus (Common Hop) · H. lupulus var. pubescens (Common Hop) · H. lupulus 'Apollo' (Hop 'apollo') · H. lupulus 'Aureus' (Aureus Golden Hops) · H. lupulus 'Cascade' (Hops) · H. lupulus 'Fuggle' (Hops) · H. lupulus 'Hallertauer' (Hops) · H. lupulus 'Northern Brewer' (Hops) · H. lupulus 'Nugget' (Hops) · H. lupulus 'Sovereign' (Hop 'sovereign') · H. lupulus 'Sunbeam' (Golden Hops)
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Further Reading
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Notes
Contributors
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 11, 2012.
Data Sources
Accessed through GBIF Data Portal November 22, 2007:
- Bundesamt für Naturschutz / Zentralstelle für Phytodiversität Deutschland, Bundesamt fuer Naturschutz / Zentralstelle fuer Phytodiversitaet Deutschland
- Canadian Museum of Nature, Canadian Museum of Nature Herbarium
- Missouri Botanical Garden, Missouri Botanical Garden
- National Institute of Genetics, ROIS, Herbarium Specimens of Museum of Nature and Human Activities, Hyogo Pref., Japan
- National Science Museum of Korea, National Science Museum of Korea Plant
- Natural History Museum, University of Oslo, Vascular Plant Herbarium, Oslo
- US National Plant Germplasm System, United States National Plant Germplasm System Collection
- USDA PLANTS, USDA PLANTS Database
- University of Alabama Biodiversity and Systematics, Herbarium
- Utah State University, USU-UTC Specimen Database
Identifiers
- Biodiversity Heritage Library NamebankID: 2667515
- Catalogue of Life Accepted Name Code: ITS-503065
- Global Biodiversity Information Facility Taxonkey: 13793661
- Globally Unique Identifier: urn:lsid:ipni.org:names:854181-1
- GRIN Nomen Number: 19414
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 503065
- International Plant Names Index (IPNI) ID: 306594-2
- Natural Heritage Network Species Identifier: PDCNB0B010
- U.S.D.A. Plant Symbol: HUSC
- Zipcode Zoo Species Identifier: 43234
Footnotes
- Zhengyi Wu, Zhe-Kun Zhou & Bruce Bartholomew "Cannabaceae". in Flora of China Vol. 5 Page 74. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
- "Humulus". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
- "Humulus japonicus". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
- Mean = 249.410 meters (818.274 feet), Standard Deviation = 259.270 based on 271 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
