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Tribe Cacteae: Lophophora Clade
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cacteae
Clade: Lophophora
The Lophophora clade contains to following Species (alphabetical order) according to Butterworth's paper (see bottom of page).
Relations within the Lophophora clade.
Strangely enough Acharagma aquirreana and Acharagma roseana, being closely related to each other, are put more closely to Lophophora diffusa than Lophophora diffusa is to Lophophora williamsii. It also shows Lophophora williamsii closer to Obregonia dengrii than to Lophophora diffusa.
Another interesting, stray thought, is our attempts at hybridizing Obregonia dengrii with both Lophophora diffusa and Lophophora williamsii. We have managed to cross Obregonia dengrii and Lophophora diffusa, but we have been totally unsuccesful, so far, with crossing Obregonia dengrii and Lophophora williamsii. This despite the fact that Butterworths paper shows more "relation" with Obregonia dengrii and Lophophora williamsii, and a close relationship between
Hybrids within the Lophophora clade.
Lophophora diffusa (Mother) x Lophophora williamsii & Lophophora williamsii (Mother) x Lophophora diffusa. In our own attempts we have foud that Lophophora diffusa and Lophophora williamsii do not, at least readily, cross pollinate with each other. In our trials, which thus far have only used simple pollen to stigma methods, these 2 species have never even produced fruit. To learn more Read here
Lophophora diffusa (Mother) x Obregonia dengrii. We have gotten this cross to not only set fruit but also germinate the seeds. To learn more Read here.
Obregonia dengrii (Mother) x Lophophora diffusa. This cross has not been successful in our attempts. To learn more Read here.
Lophophora koehresii (Mother) x Lophophora fricii. This cross seems to happen readily. To learn more Read here.
Lophophora fricii (Mother) x Lophophora koehresii. So far, we have not been able to get Lophophora fricii to form fruit with L. koehresii pollen. To learn more Read here.
NOTE: Lophophora fricii and Lophophora koehresii are not mentioned in the Butterworth paper, most likely because until 2005 they were considered to be varieties of L. diffusa or L. williamsii. The Butterworth paper was published in 2002. In Kaktusy Special 2 (2005), Lophophora fricii and L. koehresii are recognized as true species.
This page is put together from the paper by Charles A. Butterworth, J. Hugo Cota-Sanchez, and Robert S. Wallace.
Molecular Systematics of Tribe Cacteae (Cactaceae: Cactoideae): A Phylogeny Based on rpl16 Intron Sequence Variation
Abstract Parsimony analysis of plastid rpl16 sequences from 62 members of Tribe Cacteae, and four outgroup taxa yielded 1296 equally parsimonious trees of length 666. Strict consensus evaluation of these trees established a highly pectinate topology, which delimited clades within the tribe that correspond to several previously considered generic groups. Aztekium and Geohintonia, which manifest ribs in their stem morphology were shown to represent an early divergence in the tribe, forming a sister group to remaining members of the tribe. Clades containing other genera having ribbed stems also are basal to those that develop tubercles. The most derived clade forms a distinct group of typically small stemmed species with tubercular stem morphology. Within Mammillaria, species formerly placed in the genus Cochemiea and members of the Series Ancistracanthae formed a well-supported, sister clade to the remaining members of Mammillaria. Length variation of the intron in two members of Mammillaria series Stylothelae was also observed.
