Echeveria runyonii

Echeveria runyonii is a species of flowering plant in the family Crassulaceae,[1] that is native to the state of Tamaulipas in Mexico.[2] Several cultivars have been described and cultivated.

Echeveria runyonii
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Echeveria
Species:
E. runyonii
Binomial name
Echeveria runyonii

Taxonomy and Etymology

Joseph Nelson Rose described Echeveria runyonii in 1935,[1] named in honour of Texas amateur botanist Robert Runyon.[3] Runyon had collected the type specimen from a Matamoros, Tamaulipas garden[4] in 1922.[5][6] Wild populations were unknown until 1990, when one was discovered by the staff of Yucca Do Nursery.[7]

The cytology of Echeveria species is helpful in identification, as many species can be very variable in appearance; E. runyonii has 14 chromosomes.[1]

Echeveria is named for Atanasio Echeverría y Godoy, a botanical illustrator who contributed to Flora Mexicana.[8]

Description
Inflorescence

Echeveria runyonii forms a rosette 8–10 cm (3.1–3.9 in) in diameter. Leaves are spatulate-cuneate to oblong-spatulate, truncate to acuminate, and mucronate. They are a glaucous pinkish-white in color and measure 6–8 by 2.5–4 cm (2.4–3.1 by 1.0–1.6 in). The single stem reaches 10 cm (3.9 in) in length or more and a diameter of roughly 1 cm (0.39 in). Inflorescences are 15–20 cm (5.9–7.9 in) tall and have 2 – 3 cincinni, conspicuous bracts, and pedicels approximately 4 mm long. The red flowers have ascending-spreading sepals to 11 mm and pentagonal corollas measuring 19 – 20 × 10 mm.[1]

Echeveria peacockii has similar-coloured glaucous leaves, but its leaves are wedge-shaped with mucronulate (pointed) tips.[9]

Cultivars
E. runyonii 'Topsy Turvy'

Several named cultivars exist, including 'Texas Rose', 'Dr. Butterfield', 'Lucita', 'Tom Allen', and 'Topsy Turvy'. The last is a mutant form originated in California, with leaves positioned upside-down.[10]

Hybrids
  • Echeveria 'Domingo' (E. cante × E. runyonii)[11]
  • Echeveria 'Green Star' (E. harmsii × E. runyonii 'Topsy Turvy')[12]
  • Echeveria 'Swan Lake' (E. shaviana × E. runyonii 'Topsy Turvy')[13]
  • Echeveria 'Glade Surprise' (E. derenbergii × E. runyonii 'Topsy Turvy')[14]
  • Echeveria 'Dagda' (E. pulvinata 'Frosty' × E. runyonii 'Topsy Turvy')[15]
  • Echeveria 'Exotic' (E. laui × E. runyonii 'Topsy Turvy')[16]

References
  1. Kimnach, Myron (2003). Urs Eggli (ed.). Illustrated Handbook of Succulent Plants. Volume 6: Crassulaceae. Birkhäuser. pp. 103, 122. ISBN 9783540419655.
  2. Kimnach, Myron (January 2001). "Three varieties of Echeveria cuspidata". Cactus and Succulent Journal. 77 (1): 28–33. doi:10.2985/0007-9367(2005)77[28:TVOEC]2.0.CO;2.
  3. Eggli, Urs; Newton, Leonard E. (2004). Etymological Dictionary of Succulent Plant Names. Birkhäuser. p. 207. ISBN 3540004890.
  4. Scheick, William (July–August 2012). "Echeverian Beauty among the Rocks". Texas Gardener.
  5. "Isotype of Echeveria runyonii Rose, J.N. 1935 [family CRASSULACEAE]". JSTOR Global Plants. JSTOR. 2011-05-25.
  6. "Echeveria runyonii Rose ex E. Walther". Collections Search Center. Smithonian Institute. Retrieved 2012-07-01.
  7. Finkel, Marty (October 2010). "Plant of the month Echeveria 'Topsy Turvy'" (PDF). The Garden Path. Archived from the original (PDF) on 2016-03-04. Retrieved 2012-07-02.
  8. Gledhill, David (2008). "The Names of Plants". Cambridge University Press. ISBN 9780521866453 (hardback), ISBN 9780521685535 (paperback). p. 149
  9. Cactus and Succulent Society of America (1998). Haseltonia: yearbook of the Cactus and Succulent Society of America, Issues 6-10. p. 81.
  10. "RUNYONII Rose ex Walther, 1935". International Crassulaceae Network. Archived from the original on 2013-01-15. Retrieved 2012-07-01.
  11. "Domingo". International Crassulaceae Network. Archived from the original on 2013-01-15. Retrieved 2012-07-01.
  12. "Green Star". International Crassulaceae Network. Archived from the original on 2013-01-15. Retrieved 2012-07-01.
  13. "Swan Lake". International Crassulaceae Network. Archived from the original on 2013-01-16. Retrieved 2012-07-01.
  14. "Glade Surprise". International Crassulaceae Network. Archived from the original on 2013-01-15. Retrieved 2012-07-01.
  15. "Dagda". International Crassulaceae Network. Archived from the original on 2013-01-15. Retrieved 2012-07-01.
  16. "Exotic". International Crassulaceae Network. Archived from the original on 2013-01-15. Retrieved 2012-07-01.
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