Heuchera

Heuchera × brizoides

Coral Bells ( Heuchera ) constitute a genus within the family Saxifragaceae ( Saxifragaceae ). The approximately 37 species are distributed in North America from Canada to Mexico.

• 5.1 Notes and references

Description

Vegetative characteristics

Heuchera species are mostly evergreen, perennial, herbaceous plants, reach stature heights of 3 cm to 145 cm and horst -like grow. They usually form underground, stout, often branched rhizomes, which are staffed with scales. Some species form foothills ( stolons ). Many above-ground parts of plants have hairs that end in multicellular glands ( trichomes ). All or most leaves are borne in a basal rosette. The ascending or erect stems are naked axes or possess pubescens one to five alternate permanent leaves at Heuchera alba, Heuchera americana, Heuchera bracteata, Heuchera caroliniana, Heuchera longiflora, Heuchera.

The leaves are divided into long petioles and leaf blade. The green or in some varieties bronze to purple tinged leaf blades are round to oblong, egg -, kidney -, heart - or hand- shaped, then three to neunlappig. The fiedernervigen leaf surfaces are smooth to glandular- hairy and with Heuchera maxima Heuchera micrantha, parishii Heuchera, Heuchera parviflora, Heuchera pilosissima sticky. The leaf margin is notched, serrated cut up, sometimes with simple or glandular eyelashes. Stipules are present.

Generative features

In branched, loose, schirmtraubigen total inflorescences using a web part inflorescences are 100 to 1000 flowers and bracts together. In the part inflorescences are on foliage leaf -like bracts until flaky on the flower stems flowers.

The hermaphrodite, five petals are radial symmetry to zygomorphic, fünfzählig and usually bell-shaped with double perianth. The green, white, cream to yellow or pink, purple to red flowers cup ( hypanthium ) is mostly grown to one-half to one-quarter of the ovary; the free range is 0.1 to 7 mm long, it will be extended until fruit maturity. The five ( H. eastwoodiae six) usually unequal, green, white, cream-colored to yellow or pink, purple to red, often green or red patterned sepals are fused. There are usually five free, nailed, green, white, cream-colored to yellow or pink, purple available to red petals, in some species they are small or absent in most Heuchera chlorantha, H. cylindrica, Heuchera eastwoodiae. There is only one ( the outer) circle with five (with Heuchera eastwoodiae six) stamens present. The anthers are usually orange or yellow. Two carpels are completely fused into a semi- permanent under, unilocular ovary. The placentation is parietal. Often yellow to the ovary, rarely orange nectar tissue present. The two pens each terminating in a capitate stigma.

Are formed zweischnäbelige capsule fruits. The dark brown or black - brown seeds are ovoid, ellipsoid, fusiform or just on one side and convex on the other, spiky or Heuchera parviflora smooth.

The basic chromosome number is n = 7

Dissemination

The genus Heuchera is the most diverse genus of the family Saxifragaceae, it comes exclusively from North America (32 species) to Mexico ( five species). Many species thrive in mountainous regions, often near the banks of rivers. Some are also utilized in extreme habitats, so Heuchera maxima, which grows on exposed rocky shores of California's Channel Islands, or Heuchera sanguinea, which thrives in the warm dry canyons of Arizona.

System

The genus Heuchera was erected in 1753 by Carl Linnaeus in Species Plantarum, 1, p 226. The type species is Heuchera americana L.. The genus name honors the Heuchera German doctor and botanist Johann Heinrich von Heucher ( 1677-1746 ).

There are about 37 ( to 50) Heuchera species ( selection):

• Heuchera abramsii Rydb.
• Heuchera alba Rydb.
• High Coral Bells ( Heuchera americana L.): It is distributed with three varieties in eastern North America.
• Heuchera bracteata ( Torr. ) Ser.
• Heuchera brevistaminea Wiggins
• Heuchera caespitosa Eastwood
• Heuchera caroliniana ( Rosendahl Butters & Lakela ) EFWells
• Heuchera chlorantha Piper
• Roll Coral Bells ( Heuchera cylindrica Douglas ex Hook. ): It is distributed in North America.
• Heuchera eastwoodiae Rosend. et al.
• Heuchera elegans Abrams
• Bald Coral Bells ( Heuchera glabra Willd ex Roem & Schult.. . ): It grows at altitudes 0-1500 meter in the Canadian states of Alberta and British Columbia and the U.S. states of Alaska, Oregon and Washington.
• Heuchera glomerulata Rosendahl, Butters & Lakela
• Himalayan Coral Bells ( Heuchera grossulariifolia Rydb. ): It occurs in the U.S. Bundesstaanten Washington, Idaho and Montana.
• Heuchera hallii A.Gray
• Heuchera hirsutissima Rosend. et al.
• Heuchera longiflora Rydb.
• Heuchera maxima Greene: It occurs only on the California Channel Islands.
• Heuchera merriamii Eastwood
• Heuchera mexicana Schaffner: It occurs only in Mexico.
• Hoary Coral Bells ( Heuchera micrantha Douglas ex Lindl. ): It is distributed with five varieties in western North America.
• Heuchera novomexicana Wheelock
• Heuchera orizabensis Hemsl. It occurs only in Mexico.
• Heuchera parishii Rydb.
• Heuchera parviflora Bartl.
• Heuchera parvifolia Nutt. ex Torr. & A. Gray
• Coastal Coral Bells ( Heuchera pilosissima Fish & CAMey. . ): It comes only California before.
• Hairy Coral Bells ( Heuchera pubescens Pursh ): It is native to the United States.
• Beautiful Coral Bells ( Heuchera pulchella Wooton & Standlschmaus. ): It is native to the United States.
• Prairie Coral Bells ( Heuchera richardsonii R.Br. ): It is widely used in North America
• Herzblättriges Coral Bells ( Heuchera rubescens Torr. ): It occurs in the U.S. Bundesstaanten Arizona, California, Colorado, Idaho, New Mexico, Nevada, Oregon, Texas and Utah and the Mexican state of Baja California.
• Genuine Coral Bells or Heuchera Blood ( Heuchera sanguinea Engelm. ): It grows at altitudes 1200-2600 meters in Arizona, New Mexico and the Mexican state of Chihuahua.
• Spitzblättriges Coral Bells ( Heuchera villosa Michx. ): It is distributed with two varieties in the central and eastern United States.
• Heuchera wootonii Rydb.

There are horticultural hybrids produced:

• Heuchera × brizoides hort. ex Lemoine ( = Heuchera americana Heuchera micrantha × × Heuchera sanguinea )

There are also horticulturally produced hybrids between Heuchera and Tiarella: × Heucherella:

• × Heucherella tiarelloides ( Lemoine & É.Lemoine ) HRWehrh.

Use

Today, there are numerous varieties and hybrids, mostly between Heuchera sanguinea and Heuchera americana ( Heuchera × brizoides ) that are planted around the world in addition to the varieties of the output species in the temperate to subtropical areas as border or rock garden plants in parks and gardens. There are also varieties of Heuchera americana, Heuchera cylindrica, Heuchera grossulariifolia, Heuchera micrantha, Heuchera richardsonii, Heuchera rubescens, Heuchera sanguinea and Heuchera villosa cultivated. More German trivial name for rotlaubige varieties are bronze bells and silver bells Rotblättriges.

Swell

• Elizabeth Fortson Wells & Barbara Greene Shipes: Heuchera, pp. 84 - text Registered as printed work, In: Flora of North America Editorial Committee ( eds.): Flora of North America North of Mexico, Volume 8 - Paeoniaceae to Ericaceae, Oxford University Press, New York and Oxford, 2009. ISBN 978-0-19-534026-6 (sections description, systematics, distribution and use )