Dudleya

Dudleya
	Subgenus Dudleya : Dudleya greenei
Systematics
	Nuclear eudicotyledons
Order :	Saxifragales (Saxifragales)
Family :	Thick-leaf family (Crassulaceae)
Subfamily :	Sempervivoideae
Tribe :	Sedeae
Genre :	Dudleya
Scientific name
	Dudleya
	Britton & Rose

Dudleya is a genus of plants fromthe thick-leaf family (Crassulaceae). The botanical name of the genus honors the American botanist William Russel Dudley (1849–1911).

description

Vegetative characteristics

The species of the genus Dudleya are perennial , bald rosette plants with mostly fibrous roots and succulent leaves . Their shoots are not branched or branched, then mostly dichotomous. They are usually covered at their base with more or less dried leaves or leaf bases. The shoots are usually short and somewhat upright and reach a diameter between 10 and 40 millimeters (rarely 1.5 to 90 millimeters). The rosettes are at the end of the shoots. They have a diameter of 3 to 25 centimeters (rarely 1 to 50 centimeters) and consist of 20 to 40, rarely 3 to 120 leaves. The leaves are very variable in shape. Mostly they are more or less elongated to oblong (obscure) lanceolate. The upper side of the leaf is usually more or less flat or slightly concave to runny. Their underside is usually somewhat rounded to concave. They are completely connected to the stem axis with a broad base and often broadened at the base. The tip of the leaf is blunt-rounded to sharp-pointed. The streaky to densely floured leaves are usually evergreen. They are 1 to 10 centimeters (rarely 0.6 to 40 centimeters) long, 0.2 to 3 centimeters (rarely up to 10 centimeters) wide and are 2 to 6 millimeters (rarely 1 to a maximum of 25 millimeters) thick.

Subgenus Dudleya : Dudleya verityi

Inflorescences and flowers

The single to numerous, mostly more or less upright to ascending flower stems appear annually from the leaf axils . They are 5 to 40 centimeters (up to a maximum of 100 centimeters) long. The zymous inflorescence consists of 3 to 20 (rarely 2 to 30) flowers . The five-fold (rarely four-fold) odorless flowers are obdiplostemon . The calyx is 3 to 8 millimeters (rarely 2 to 9 millimeters) long. Its sepals are fused together at the base. Your free calyx lobes are 1.5 to 6 millimeters (rarely 1 to 8 millimeters) long. The corolla has a diameter of 3.5 to 23 millimeters and a length of 1 to 4 millimeters (rarely 0.5 to 10 millimeters). Their mostly pale yellowish to yellow petals are usually somewhat elliptical to oblong or egg-shaped. The corolla lobes are more or less upright or from the middle to the tip a little spreading-spreading to bent back.

The ten stamens are in two circles. They are shorter than petals. The anthers are usually yellow and 1 to 2 millimeters long. The clipped nectar flakes are 0.5 to 2 millimeters wide. The stylus is slim.

Fruits and seeds

The fruit is a more or less brown or brownish and rarely red follicle fruit . The more or less brown, narrow spindle-shaped seeds contained therein are 0.5 to 1.5 millimeters in size. Their seed coat is ribbed.

Subgenus Dudleya : Dudleya cespitosa

Subgenus Dudleya : Dudleya candelabrum

Subgenus Dudleya : Dudleya cymosa

Subgenus Dudleya : Dudleya farinosa

Subgenus Dudleya : Dudleya pulverulenta

Subgenus Dudleya : Dudleya saxosa

Subgenus Stylophyllum : Dudleya edulis

Hasseanthus subgenus : Dudleya nesiotica

Systematics and distribution

The genus Dudleya is distributed in southwest Oregon , in southern Nevada , in central and western Arizona and in California in the United States as well as in the Mexican states of Sonora and Baja California , where the plants mainly grow in rocky places in mostly coastal areas.

The first description by Nathaniel Lord Britton and Joseph Nelson Rose was published in 1903. According to Joachim Thiede, the genus Dudleya is divided into three sub-genera with the following species:

Subgenus Dudleya

Dudleya abramsii Rose : With the subspecies:

Dudleya abramsii subsp. abramsii : It occurs in California and Baja California at altitudes between 300 and 1900 meters above sea level.

Dudleya abramsii subsp. affinis K.M. Nakai : It occurs in California at altitudes between 1,800 and 2,600 meters above sea level.

Dudleya abramsii subsp. bettinae (Hoover) Bartel : It occurs in California at altitudes between 0 and 200 meters above sea level.

Dudleya abramsii subsp. murina (Eastw.) Moran : It occurs in California at altitudes between 100 and 600 meters above sea level.

Dudleya abramsii subsp. parva (Rose & Davidson) Bartel : It is also seen by some authors as an independent species: Dudleya parva Rose & Davidson . It occurs only in Ventura County, California, at altitudes between 100 and 400 meters above sea level.

Dudleya acuminata Rose : It was described from Baja California.

Dudleya albiflora Rose : It was described from Baja California.

Dudleya anthonyi Rose : It was described from Baja California.

Dudleya brevipes Rose : It was described from Baja California, Mexico.

Dudleya brittonii Johans. : It was described from Baja California, Mexico.

Dudleya cespitosa (Haw.) Britton & Rose ; Home: California; it occurs at altitudes between 0 and 600 meters above sea level.

Dudleya calcicola Bartel & Shevock . It is also considered a subspecies by some authors: Dudleya abramsii Rose subsp. calcicola (Bartel & Shevock) KM Nakai . It occurs in California at altitudes between 500 and 2000 meters above sea level.

Dudleya candelabrum Rose : It is endemic to Santa Cruz Island and Santa Rosa Island (California) and occurs there at altitudes between 0 and 600 meters above sea level.

Dudleya candida Britton & Rose ; Home: Mexico (Baja California)

Dudleya cultrata rose

Dudleya cymosa (Lem.) Britton & Rose ; Home: California and Oregon. With the subspecies:

Dudleya cymosa subsp. agourensis K. M. Nakai : It occurs in California in the Santa Monica Mountains at altitudes between 200 and 500 meters above sea level.

Dudleya cymosa subsp. costatifolia Bartel & Shevock : Some authors also call it the subspecies Dudleya abramsii Rose subsp. costatifolia (Bartel & Shevock) Moran posed to Dudleya abramsii . It occurs in California at altitudes between 1500 and 1700 meters above sea level.

Dudleya cymosa subsp. crebrifolia K.M. Nakai & Verity : It is endemic to the San Gabriel Mountains and occurs there at altitudes between 300 and 600 meters above sea level.

Dudleya cymosa subsp. cymosa : It occurs in California at altitudes between 0 and 2700 meters above sea level.

Dudleya cymosa subsp. marcescens Moran : It occurs in the Santa Monica Mountains , Los Angeles and Ventura County.

Dudleya cymosa subsp. ovatifolia (Britton) Moran : It occurs in the Santa Monica Mountains and in the Santa Ana Mountains at altitudes between 200 and 400 meters above sea level.

Dudleya cymosa subsp. paniculata (Jeps.) KM Nakai : It occurs in California at altitudes between 30 and 1200 meters above sea level.

Dudleya cymosa subsp. pumila (Rose) KM Nakai : It occurs in California at altitudes between 100 and 2600 meters above sea level.

Dudleya farinosa (Lindl.) Britton & Rose : It occurs in California and Oregon at altitudes between 0 and 600 meters above sea level.

Dudleya gatesii Johans. : It was described from Baja California, Mexico.

Dudleya gnoma S.W. McCabe : It only occurs on Santa Rosa Island .

Dudleya greenei Rose : It occurs only on the Californian islands of Santa Cruz Island , Santa Catalina Island , San Miguel Island and Santa Rosa Island .

Dudleya guadalupensis Moran : It occurs only on the island of Guadalupe in the Mexican state of Baja California.

Dudleya Ingens Rose

Dudleya lanceolata (Nutt.) Britton & Rose : It occurs in the Mexican state of Baja California and in California at altitudes between 0 and 1,300 meters above sea level.

Dudleya linearis (Greene) Britton & Rose

Dudleya nubigena (Brandegee) Britton & Rose

Dudleya nubigena subsp. cerralvensis Moran : It was described from Baja California, Mexico.

Dudleya nubigena subsp. nubigena

Dudleya pachyphytum Moran & M. Benedict : It was described from Mexico.

Dudleya palmeri (S. Watson) Britton & Rose : It occurs in California from the Santa Lucia Mountains in Monterey County to the Santa Monica Mountains in Los Angeles County at altitudes between 0 and 100 meters above sea level.

Dudleya pauciflora Rose : It was described from Baja California, Mexico.

Dudleya pulverulenta (Nutt.) Britton & Rose

Dudleya pulverulenta subsp. arizonica (Rose) Moran (Syn .: Dudleya arizonica Rose ): It occurs in the US states Nevada, Utah, Arizona, California and in the Mexican states Baja California and Sonora.

Dudleya pulverulenta subsp. pulverulenta : It occurs in California and in the Mexican state of Baja California.

Dudleya rigida Rose : It was described from Baja California, Mexico.

Dudleya rigidiflora rose

Dudleya rubens (Brandegee) Britton & Rose ; Home: Mexico (Baja California)

Dudleya saxosa (ME Jones) Britton & Rose : With the subspecies:

Dudleya saxosa subsp. aloides (Rose) Moran : It occurs in California at altitudes between 200 and 1900 meters above sea level.

Dudleya saxosa subsp. collomiae (Rose ex CV Morton) Moran : It occurs in Arizona at altitudes between 400 and 1800 meters above sea level.

Dudleya saxosa subsp. saxosa : It occurs in California at altitudes between 1100 and 2200 meters above sea level.

Dudleya setchellii (Jeps.) Britton & Rose : It is also referred to as the subspecies Dudleya abramsii Rose subsp. setchellii (Jepson) Moran to Dudleya abramsii . It occurs in California at altitudes between 100 and 300 meters above sea level.

Dudleya stolonifera Moran : Endemic to the San Joaquin Hills of Orange County, California.

Dudleya verityi K. Nakai : It only occurs in the Santa Monica Mountains of California.

Subgenus Stylophyllum (Britton & Rose) Moran
- Dudleya anomala (Davidson) Moran (Syn .: Stylophyllum anomalum Davidson ): It was described from the Mexican Baja California.

Subgenus Hasseanthus (Rose) Moran
- Dudleya blochmaniae (Eastw.) Moran , with the subspecies:
  - Dudleya blochmaniae subsp. blochmaniae : It occurs in California and Baja California.
  - Dudleya blochmaniae subsp. brevifolia (Moran) Moran : It is considered by some authors as a separate species: Dudleya brevifolia (Moran) Moran . It occurs in California.
  - Dudleya blochmaniae subsp. insularis (Moran) Moran : It is endemic to Santa Rosa Island (California) .
- Dudleya multicaulis (Rose) Moran : It occurs in California at altitudes between 0 and 700 meters above sea level and is endemic to the coastal plain of Los Angeles and the adjacent hills.
- Dudleya nesiotica (Moran) Moran : It occurs in California on the coast at altitudes between 10 and 30 meters above sea level.
- Dudleya variegata (S. Watson) Moran ; Home: Southern California, Baja California, at altitudes between 0 and 500 meters above sea level.

The genus also includes the hybrids Dudleya × semiteres (Rose) Moran and Dudleya × sproulii P.H. Thomson .

proof

literature

Urs Eggli (ed.): Succulent lexicon. Crassulaceae (thick leaf family) . Eugen Ulmer, Stuttgart 2003, ISBN 3-8001-3998-7 , pp. 87-105 .
Walter Erhardt among others: The big pikeperch. Encyclopedia of Plant Names . Volume 2, page 1375. Verlag Eugen Ulmer, Stuttgart 2008. ISBN 978-3-8001-5406-7

Individual evidence

^ Bulletin of the New York Botanical Garden . Volume 3, No. 9, p. 12. New York 1903
^ Joachim Thiede: Dudleya. In: Urs Eggli: Succulents Lexicon Volume 4. Crassulaceae (thick-leaf plants) . 2003, pp. 87-105
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w ^x ^y ^z ^aa ^ab ^ac ^ad ^ae ^af ^ag ^ah ^ai ^aj ^ak ^al ^am ^an ^ao ^ap ^aq ^ar ^as Reid V. Moran : Dudleya Britton & Rose. In: Flora of North America, vol. 8. Crassulaceae. [1] .
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ The International Plant Names Index. [2]

Web links

Commons : Dudleya - collection of images, videos and audio files

[1] Bulletin of the New York Botanical Garden . Volume 3, No. 9, p. 12. New York 1903

[2] Joachim Thiede: Dudleya. In: Urs Eggli: Succulents Lexicon Volume 4. Crassulaceae (thick-leaf plants) . 2003, pp. 87-105

[FNA-3] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w ^x ^y ^z ^aa ^ab ^ac ^ad ^ae ^af ^ag ^ah ^ai ^aj ^ak ^al ^am ^an ^ao ^ap ^aq ^ar ^as Reid V. Moran : Dudleya Britton & Rose. In: Flora of North America, vol. 8. Crassulaceae. [1] .

[IPNI-4] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ The International Plant Names Index. [2]