ISI 2026-3. Epiphyllum laui Kimnach.
Myron Kimnach named this species for Alfred Lau who first collected it in 1975 and again in 1984. The first collection was made north of Tumbala, in the state of Chiapas, the southernmost state of Mexico. We grew both of the Lau collections at the Huntington for a time, but they succumbed to what Myron attributed to a viral infection. He also attributed the early abortion of flower buds to this virus, delaying the formal description of the species until 1990. When healthy, it is a vigorous plant with reddish-blushed new growth. Flowers open after dark the first night but can remain fully open for two days making these both nocturnal, like most epiphyllums, and diurnal, increasing their chances of being pollinated by nocturnal moths or diurnal bees among other pollinators. We offer rooted cuttings of HBG 142171, received from Rudi Dorsch May 13, 2019. This is the clonotype collected by Alfred Lau (1319), December, 1975: Mexico; Chiapas; in the jungles north of Tumbala, 2000 m.
Photo © 2026 by Zsolt Varga.
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