Echeveria runyonii

Echeveria runyonii
E. runyonii
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Echeveria
Series: Pruinosae[1]
Species: E. runyonii
Binomial name
Echeveria runyonii

Echeveria runyonii is a species of flowering plant in the sedum family, Crassulaceae,[2] that is native to the state of Tamaulipas in Mexico.[3] Several cultivars have been described and cultivated.

Taxonomy

Joseph Nelson Rose described Echeveria runyonii in 1935,[2] named in honour of Texas amateur botanist Robert Runyon.[4] Runyon had collected the type specimen from a Matamoros, Tamaulipas garden[5] in 1922.[6][7] Wild populations were unknown until 1990, when one was discovered by the staff of Yucca Do Nursery.[8]

The cytology of Echeveria species is helpful in identification, as many species can be very variable in appearance; E. runyoni has 14 chromosomes.[2]

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.[2]

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.[1]

Hybrids

  • Echeveria 'Domingo' (E. cante × E. runyonii)[10]
  • Echeveria 'Green Star' (E. harmsii × E. runyonii 'Topsy Turvy')[11]
  • Echeveria 'Swan Lake' (E. shaviana × E. runyonii 'Topsy Turvy')[12]
  • Echeveria 'Glade Surprise' (E. derenbergii × E. runyonii 'Topsy Turvy')[13]
  • Echeveria 'Dagda' (E. pulvinata 'Frosty' × E. runyonii 'Topsy Turvy')[14]
  • Echeveria 'Exotic' (E. laui × E. runyonii 'Topsy Turvy')[15]

References

  1. 1 2 "RUNYONII Rose ex Walther, 1935". International Crassulaceae Network. Retrieved 2012-07-01.
  2. 1 2 3 4 5 Kimnach, Myron (2003). Urs Eggli, ed. Illustrated Handbook of Succulent Plants. Volume 6: Crassulaceae. Birkhäuser. pp. 103, 122. ISBN 9783540419655.
  3. ↑ Kimnach, Myron (January 2001). "Three varieties of Echeveria cuspidata". Cactus and Succulent Journal. 77 (1): 28–33.
  4. ↑ Eggli, Urs; Newton, Leonard E. (2004). Etymological Dictionary of Succulent Plant Names. Birkhäuser. p. 207. ISBN 3540004890.
  5. ↑ Scheick, William (July–August 2012). "Echeverian Beauty among the Rocks". Texas Gardener.
  6. ↑ "Isotype of Echeveria runyonii Rose, J.N. 1935 [family CRASSULACEAE]". JSTOR Plant Science. JSTOR. 2011-05-25. JSTOR 01014098.
  7. ↑ "Echeveria runyonii Rose ex E. Walther". Collections Search Center. Smithonian Institute. Retrieved 2012-07-01.
  8. ↑ Finkel, Marty (October 2010). "Plant of the month Echeveria 'Topsy Turvy'" (PDF). The Garden Path.
  9. ↑ Cactus and Succulent Society of America (1998). Haseltonia: yearbook of the Cactus and Succulent Society of America, Issues 6-10. p. 81.
  10. ↑ "Domingo". International Crassulaceae Network. Retrieved 2012-07-01.
  11. ↑ "Green Star". International Crassulaceae Network. Retrieved 2012-07-01.
  12. ↑ "Swan Lake". International Crassulaceae Network. Retrieved 2012-07-01.
  13. ↑ "Glade Surprise". International Crassulaceae Network. Retrieved 2012-07-01.
  14. ↑ "Dagda". International Crassulaceae Network. Retrieved 2012-07-01.
  15. ↑ "Exotic". International Crassulaceae Network. Retrieved 2012-07-01.
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