운둘라티폴리아

운둘라티폴리아

crassula arborescens subsp. undulatifolia

Description: Crassula arborescens is commonly found in cultivation by the typical form of ssp arborescens, with thick rounded leaves that have earned it the common name of silver dollar jade. Subspecies undulatifolia has more elliptic/tongue-shaped, bluish-grey, thinner, less fleshy and twisted purple edged leaves, giving rise to the subspecies epithet. It also forms a large a branched pseudo-tree 0.6-2 m tall, similar to the jade plant, Crassula ovata. The subspecies undulatifolia has particularly glaucous leaves, very stout succulent branches and a natural bonsai-like aspect with compact rounded heads of whitish star flowers whose glossy petals are wider than most Crassula cultivars.
Leaves: In opposite pairs, erect not spreading, elliptic to elliptic-oblanceolate, 8-15(-20) mm broad, only slightly fleshy, bluish-grey, with dark green dots and purple undulated margins (not to resting in one plan as in subsp. arborescens).
Flowers: The flowers are very showy and carried in dense branches, are star-like, white to pink with almost spherical heads and carried slightly above the foliage. When flowering in spring to summer, the plant is almost completely covered with flowers. After pollination, the flowers turn to a papery brown which in itself is quite decorative.
Fruits 3-5 separate, oval, sharply tipped follicles (simple dry fruits splitting along one suture) c. 6 mm long remaining among the dried remains of persistent petals.
Seeds: Very small dispersed by wind.
Remarks: This plant was introduced in Europe and described by Dr. B.K Boom in the Dutch journal Succulenta in 1963 and again in Succulenta 59 (6), 1980, as Crassula portulacea 'Blauwe Vogel' (which translates to "blue bird") and was long thought to be a hybrid of Crassula ovata and Crassula arborescens, but it is the same as Crassula arborescens ssp. undulatifolia, a name validly published by Toelken in 1974. Crassula’Blue Bird’ is a synonym.

http://www.llifle.com/Encyclopedia/SUCCULENTS/Family/Crassulaceae/27655/Crassula_arborescens_subs._undulatifolia