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Petrocosmea rosettifolia C.Y.Wu ex H.W.Li

Family: GESNERIACEAE

Publication: Bull. Bot. Res., Harbin 3(2): 19–20, photo. 10 1983.

Description

Petrocosmea rosettifolia are quite small, only 5-7 cm high. They possess slightly succulent leaves of rather a light green colour. The whole plant is profusely covered with whitish hairs, giving a most unusual appearance. The flowers, even if small are most elegant, and of a lilac shade of blue or white. They forms lots offsets. Most of the plants labelled Petrocosmea rosettifolia are indeed Petrocosmea cryptica.

Origin and Habitat

China.

Cultivation and Propagation

Petrocosmea offsets free. Once removed offsets are treated just like cutting until they form roots.

Theys may never need large pots.

Bibliography

Major references and further lectures

  1. Evan Hillhouse Methven Cox “New Flora and Silva”, Volume 11, 1938

  2. Tim Tuttle “Culture of Petrocosmea: My Way” “As distributed to the National Capital Area Chapter of The Gesneriad Society in April 2009 http://nationalcapitalgesneriads.org/pdfs/culture%20of%20petrocosmea.pdf

  3. Julian Shaw “A new species of Petrocosmea: Julian Shaw discovers that a gesneriad that has been in cultivation under the wrong name for more than 10 years is a new species” The Plantsman September 2011 pp 177-179. https://www.rhs.org.uk/about-the-rhs/publications/magazines/the-plantsman/2011-issues/september/Petrocosmea

  4. Drew, R (2002) “Sussex Show, October 6th. The Alpine Gardener” 70(1): 82–85

  5. Drew, R (2003) “Developing a collection of subalpine gesneriads”. The Alpine Gardener 71(3): 297–307

  6. Li, Z-Y & Wang, Y-Z (2005) “Plants of Gesneriaceae in China”. Henan Science and Technology Publishing House, China

  7. Middleton, DJ & Triboun, P (2010) “Two new species of Petrocosmea”. Thai Forest Bull., Bot. 38: 42–47

  8. Wang, W (1985) “The second revision of Petrocosmea”. Acta Bot.Yunnan. 7(1): 49–68

  9. Wang, W, Pan, K-Y, Li, Z-Y, Weitzman, AL & Skog, LE (1998) Petrocosmea. In: Flora of China Editorial Committee (eds) “Flora of China” Vol. 18. Science Press, Beijing, & Missouri Botanical Garden Press, St Louis