Biology:Dudleya virens

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Short description: Species of succulent

Green liveforever
Dudleya hassei 2.jpg
Dudleya virens ssp. hassei
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Dudleya
Species:
D. virens
Binomial name
Dudleya virens
(Rose) Moran
Synonyms[1]
  • Cotyledon albida (Rose) Fedde
  • Cotyledon hassei (Rose) Fedde
  • Cotyledon insularis (Rose) Fedde
  • Cotyledon virens (Rose) Fedde
  • Dudleya hassei (Rose) Moran
  • Dudleya insularis (Rose) P.H. Thomson
  • Echeveria hassei (Rose) A.Berger
  • Echeveria insularis (Rose) A.Berger
  • Echeveria virens (Rose) A.Berger
  • Stylophyllum insulare Rose
Foliage.
Flower.

Dudleya virens, the green liveforever or bright green dudleya, is an uncommon species of perennial, succulent plant in the family Crassulaceae, native to several coastal southern California and Baja California locations.[2]

Distribution

The succulent is found growing in the Palos Verdes Hills on the Palos Verdes Peninsula coast in Los Angeles County; on several of the Channel Islands in California; and on Guadalupe Island off the northwestern Baja California Peninsula, Mexico.

Description

Dudleya virens leaves are fleshy and strap-shaped, 8–20 cm long and 1.5–3 cm broad, tapering from the base (or from near middle) and are mostly green. They are arranged in a rosette.

The flowers are white, with five petals 7–10 mm long. They are produced in April, May, and June. Hummingbirds visit the flowers for their nectar.

Subspecies

Name Authority Common name Distribution Image
Species Dudleya virens (Rose) Moran
D. v. subsp. extima
subsp. extima Moran Guadalupe green liveforever Endemic to Guadalupe Island
Caudex 1 to 2.5 cm thick, either branching into clumps of up to 15 rosettes or elongating up to 30 cm. Rosettes are 5 to 15 cm wide, containing 15 to 55 crowded leaves. Leaves are bright green or glaucous. Leaf shape is linear to oblong-oblanceolate, 4 to 7 or rarely up to 17 cm long, 6 to 10 mm wide above when linear but up to 15 mm wide above when oblanceolate, 8 to 15 mm wide at the base and 2 to 4 mm thick. Peduncle 5 to 20 cm tall, 2 to 5 mm thick, inflorescence 2 to 7 cm wide, composed of 2 to 4 ascending branches. Flowers are white with petals 7 to 10 mm long. Chromosomes n = 17, 34.[3]
D. v. subsp. hassei
subsp. hassei

syn. Stylophyllum hassei

syn. Cotyledon hassei

syn. Echeveria hassei

syn. Dudleya hassei

(Rose) Moran[3]

Rose in Britton & Rose[4]

(Rose) Fedde[5]

(Rose) Berger[6]

(Rose) Moran[7]

Catalina Island liveforever Endemic to Santa Catalina Island.
Dudleya hassei 3.jpg
Caudex 1 to 3 cm thick, branching into clumps 1 m wide. Rosettes are 4 to 8 cm wide, containing 15 to 30 erect leaves. Leaves are generally glaucous, but rarely can be green. Leaf shape is linear-oblong to linear-lanceolate and 5 to 10 cm long, 2 to 4 mm thick. Peduncle 10 to 30 cm tall, inflorescence branching into 2 to 4 close set or once bifurcate branches. Flowers are white with petals 8 to 10 mm long. Chromosomes n = 34.[8]
D. v. subsp. insularis
subsp. insularis

syn. Stylophyllum insulare

syn. Cotyledon insularis

syn. Cotyledon viscida var. insularis

syn. Echeveria insularis

syn. Echeveria viscida var. insularis

syn. Dudleya insularis

(Rose) Moran

Rose in Britton & Rose[4]

(Rose) Fedde[5]

(Rose) S. Watson [9]

(Rose) Berger[6]

(S. Watson) Berger[10]

(Rose) P. H. Thomson[11]

Island green dudleya Occurs in the Palos Verdes Hills, Santa Catalina and San Nicolas islands.
J20171114-0036—Dudleya virens ssp insularis—RPBG—DxO (37663360805).jpg
Caudex 2 to 6 cm thick, up to 1 m long, branching into clumps 2 m wide. Rosettes are 10 to 25 cm wide, containing 20 to 50 spreading to erect leaves. Leaves sometimes glaucous, sometimes green. Leaf shape is triangular-lanceolate, 6 to 25 cm long and 10 to 32 mm wide above, 2 to 4 cm wide at the base, with an obtuse tip. Peduncle 6 to 70 cm tall, 5 to 15 mm thick. Flowers are white with red to orange keels, petals 8 to 10 mm long. Chromosomes n = 17.[12]
D. v. subsp. virens
subsp. virens

syn. Stylophyllum virens

syn. Cotyledon virens

syn. Echeveria virens

syn. Dudleya virens

syn. Stylophyllum albida

syn. Cotyledon albida

syn. Echeveria albida

syn. Dudleya albida

(Rose) Moran

Rose in Britton & Rose[4]

(Rose) Fedde[5]

(Rose) Berger[6]

(Rose) Moran[13]

Rose in Britton & Rose[4]

(Rose) Fedde[5]

(Rose) Berger[6]

(Rose) P. H. Thomson[11]

Bright green dudleya

Alabaster plant

Endemic to San Clemente Island.
Bright Green Dudleya 1.jpg
Caudex 1 to 3.2 cm wide, branching into clumps at least 40 cm wide. Rosettes are 5 to 10 cm wide, containing 20 to 50 leaves. Leaves are usually green, rarely glaucous. Leaf shape is triangular-lanceolate to linear-lanceolate, 3 to 10 cm long and 10 to 15 mm wide above, 1.5 to 3 cm wide at the base, with an acute tip. Peduncle is 7 to 46 cm long, 4 to 7 mm thick, inflorescence 6 to 15 cm wide with 3 to 4 close-set branches towards the apex. Flowers are white with red to orange keels, petals 8 to 10 mm long. Chromosomes n = 17.[14]

Cultivation

Dudleya virens is cultivated as an ornamental plant in the specialty native plants and succulents horticulture trade.[15] It is used in containers, drought tolerant landscapes, and habitat gardens. It prefers well-draining soil, and grows best in full sun or light shade.

References

  1. ↑ The Plant List: A Working List of All Plant Species, http://www.theplantlist.org/tpl1.1/record/kew-2779014, retrieved 9 July 2016 
  2. ↑ Calflora Database: Dudleya virens . accessed 6.30.2013
  3. ↑ 3.0 3.1 Moran, Reid (1995). "THE SUBSPECIES OF DUDLEYA VIRENS (CRASSULACEAE)". Haseltonia 3: 4. https://crassulaceae.com/botanik/pflanzen/botanzeige_scan_en.asp?gnr=1510&scan=133100-3&cat=8&name=Dudleya. 
  4. ↑ 4.0 4.1 4.2 4.3 Bull. New York Bot. Gard. 3(9): 34-35. 1903
  5. ↑ 5.0 5.1 5.2 5.3 Just's Bot. Jahresber. 31(1): 829. 1904.
  6. ↑ 6.0 6.1 6.2 6.3 Engler, Nat. Pflanzenfam. ed. 2, 18a: 480. 1930
  7. ↑ Moran, Reid (1957). "Dudleya hassei". Madroño 14: 108. 
  8. ↑ McCabe, Stephen Ward (2012). "Dudleya virens subsp. hassei". Jepson Flora Project (eds.). https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=80496. 
  9. ↑ Jeps., Man. Fl. Pl. Calif, p. 453. 1925.
  10. ↑ (Rose) Jeps., Fl. Calif. 2: 115. 1936.
  11. ↑ 11.0 11.1 Dudleya Hasseanthus handbook, p. 80, 240-241. 1993
  12. ↑ McCabe, Stephen Ward (2012). "Dudleya virens subsp. insularis". Jepson Flora Project (eds.). https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=80220. 
  13. ↑ Moran, Reid (1943). "Dudleya virens". Desert Plant Life 14: 191. 
  14. ↑ McCabe, Stephen Ward (2012). "Dudleya virens subsp. virens". Jepson Flora Project (eds.). https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=80229. 
  15. ↑ Rancho Santa Ana Botanic Garden: Native Plants for Coastal Gardens . accessed 6.30.2013

External links

Wikidata ☰ Q5312069 entry



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