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All Polyscias prefer a warm sunny location. Cold drafts, cold water or cool room temperatures will cause leaf drop.
Species and varieties:
Prosthechea cochleata is an epiphytic, perennial orchid. It is valued for the unusual shape of its flowers, which can resemble an octopus, and is common in cultivation. The flowers are unusual in that they are held the other way up in comparison with the majority of orchids. Instead of being resupinate (twisted so that the lip is borne upside down) the lip is held at the top of the flower (non-resupinate).
Hybrid of Black Varnish that has an amazing combination of Purple, dark green, and black colors of the leaves. Leaves change color as they mature and also depending on light and season. Spikes of deep mauve flowers sprinkled with pink from Winter to Spring. The plant may flower several times a year. If grown in filtered light, leaves get larger and darker.
Pseudolithos migiurtinus is one of the rarest of the succulent milkweeds. Fleshy, hemispherical, often elliptical in section, pale green or yellow-green to grey stems 12 cm in diameter. The flowers are dark red and about 5/7 mm across.
It needs regular watering, especially during the hottest summer days; provide also some light watering if the green house temperatures in winter are elevated. Either excessive or very scarce watering can induce rot.