Humulus lupulus (strobile)

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=Botanical Voucher Specimen=
 
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|caption3=''Humulus lupulus'' var. ''pubescens'' E.Small
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Latest revision as of 16:17, 21 July 2015

AHPA recognizes other valuable resources exist regarding the identity of Humulus lupulus.

To submit a suggestion or contribution, please contact Merle Zimmermann.

Contents

Nomenclature

Humulus lupulus L.   Cannabaceae  
Standardized common name (English): hops

Botanical Voucher Specimen

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Humulus lupulus Tropicos 100003862.jpg
Source: MOBOT, Tropicos.org[1]

Humulus lupulus var. lupuloides E.Small - Starr - 00248726.jpg
Humulus lupulus var. lupuloides E.Small
Source: Images courtesy of the C.V. Starr Virtual Herbarium of the New York Botanical Garden[2]

Humulus lupulus var. pubescens E.Small - Starr - 00248727.jpg
Humulus lupulus var. pubescens E.Small
Source: Images courtesy of the C.V. Starr Virtual Herbarium of the New York Botanical Garden[3]


Organoleptic Characteristics

[Humulus lupulus (strobile) ...] odor strong and characteristic, becoming disagreeable and valerian-like on aging; taste aromatic and bitter.

Their odor is strong, peculiar and fragrant; their taste very bitter, aromatic, and slightly astringent.
Source: United States Dispensatory (1918) [4]

Macroscopic Characteristics

The hop plant is a twining, rough perennial having angular, rough, flexible stems, which twine around neighboring objects in a spiral direction from left to right, and climb to a great height. The leaves are opposite, and stand upon long footstalks. The smaller are sometimes cordate; the larger have three or five lobes; all are serrate, of a deep green color on the upper surface, and, together with the petioles, extremely rough, with minute prickles. At the base of the footstalks are two to four smooth, ovate, reflexed stipules. The flowers are numerous, axillary, and furnished with bracts. The staminate flowers are a yellowish-white, and arranged in panicles; the pistillate, which grow on a separate plant, are pale green, and disposed in solitary, peduncled aments, composed of membranous scales, ovate, acute, and tubular at the base. Each scale bears, near its base, on its inner surface, two flowers, consisting of a roundish compressed ovary, and two styles, with long filiform stigmas. The aments are converted into ovate membranous cones or strobiles, the scales of which contain, each, at its base, two small achenes, surrounded by a yellow, granular powder [...]

Hops consists of numerous thin, translucent, veined, leaf-like scales, which are of a pale greenish-yellow color, and contain near the base two small, round, black achenes.

Strobile ovoid-cylindrical, about 3 cm. in length, consisting of a narrow, hairy, flexuous rachis and numerous, imbricated, yellowish-green to pale brown, obliquely-ovate, membranous scales, the base of each with numerous, yellowish-brown, glandular hairs, and frequently infolded on one side, enclosing a subglobular, light brown, very glandular achene.

Source: United States Dispensatory (1918) [5]
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PlantaPhile - 242.jpg
Source: PlantaPhile[6]

PlantaPhile - 2623.jpg
Source: PlantaPhile[7]

Microscopic Characteristics

High Performance Thin Layer Chromatographic Identification

Supplementary Information

Sources

  1. ↑ MOBOT, Tropicos.org http://www.tropicos.org/Image/100003862
  2. ↑ Images courtesy of the C.V. Starr Virtual Herbarium of the New York Botanical Garden http://sciweb.nybg.org/science2/VirtualHerbarium.asp
  3. ↑ Images courtesy of the C.V. Starr Virtual Herbarium of the New York Botanical Garden http://sciweb.nybg.org/science2/VirtualHerbarium.asp
  4. ↑ United States Dispensatory (1918)
  5. ↑ United States Dispensatory (1918)
  6. ↑ PlantaPhile http://plantaphile.com/
  7. ↑ PlantaPhile http://plantaphile.com/
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