font settings and languages

Font Size: Large | Normal | Small
Font Face: Verdana | Geneva | Georgia
Languages:

Humulus lupulus 'Golden Showers'

Interesting Facts

[ Back to top ]
 

Description

[ Back to top ]

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]

Taxonomy

[ Back to top ]

Notes

A tentatively accepted name in the RHS Horticultural Database.

Similar Species

[ Back to top ]

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)

More Info

[ Back to top ]

Further Reading

[ Back to top ]

Notes

[ Back to top ]

Contributors

Identifiers

Footnotes

  1. 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]
  2. "Humulus". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
Last Revised: 2012-07-29