How good of Being Earnest, in this case, all available types of sedum. Why? Since then there can be a fatal error, what happened to me in case of Sedum rupestre 'Lemon Coral'. Not long ago, I warned my friend and colleague from the U.S., Brent Horvath, it could be a kind of Sedum mexicanum, Sedum rupestre not on. The truth is that it mentioned rupestre I disliked from the very beginning, and I considered the possibility that it might be a Sedum sediforme. S. sediforme Why? First, I knew no other like sedum, which could correspond to a robust appearance Lemon Coral and confused me similar growth form, shape, size and position of leaves on the stem. However, only until such time as I studied the literature and it now from 4 different authors, so I confirmed that this is indeed a kind of Sedum mexicanum. The index of valid names, which annually sends me R. Stephenson, then the problem was traced cultivars name. So most likely it is

Sedum mexicanum 'Gold Mound'.

Me on the Internet tracking synonyms are:

Sedum rupestre 'Lemon Coral'

Sedum rupestre 'Lemon Ball'

Sedum mexicanum 'Gold Carpet'

Sedum mexicanum 'Gold Acopulo'

Sedum mexicanum is very mysterious plant. She just occurred. Nowhere does the exact origin, eat clear whether the plant comes from Mexico, Japan or Europe, where it is cited as a naturalized species. There is a possibility that this is a natural hybrid of P. sediforme, unintentionally introduced into Japan and then further away to Mexico. Or, conversely, in the 17th and 18 century, thanks to the Portuguese mořeplavbám, created Introduced to Europe Sedum lineare is a natural hybrid of Sedum sediforme resulting hybrid and then traveled further into the world where it was first described as

Sedum mexicanum Britton (Bull. New York Bot. Gard. 1: 257, 1899).

Herbaceous, succulent, very brittle, the flowering stems weak, Becoming a dm. long, leaves linear, sessile, compressed, Tapering to a blunt tip, scattered on the flowering stems, more crowded on the sterile shoots, 8-20 mm. long, about 2 mm. wide, inflorescence of 3 2-Forked Usually recurving branches, 4-8 cm. long, flowers close together, sessile, the bracts longer Than Similar sepals, petals golden yellow, oblong, acute at the apex, Concave, Tapering into a short claw, widely spreading, 5-6 mm. long, 1.5 mm. wide, a little longer Than the two outer sepals, twice as long as the three inner ones; maziva filiform, Nearly As Long As the petals, anthers short, oval, long pistils and stamens, and the; style subulate, 1 mm. long.

Grown from seeds Collected by Mrs.. Britton on Dyke and trap near the City of Mexico, November, 1896. Flowered house cool in May, 1898. Very Show in bloom. (Type specimen in Herbarium of the New York Botanical Garden.)

Bulletin of the New York Botanical Garden, 1899

Let's return back to Europe. The areas containing Sedum sediforme are Spain, Portugal and France, as well as the incidence is reported domesticated species Sedum mexicanum and Sedum lineare (Eggli - Crassulaceae 2001). Why would therefore not be possible that the emergence of P. mexicanum as a hybrid in Europe? These assumptions lead me to the fact that the growth form of P. mexicanum is typical for a group Rupestria that occur elsewhere in the world. To speak Japanese origin procumbent growth form and grouping finely papilózních sheets in 4 whorls, as is the case with Sedum lineare in 3 to 4 whorls, which coincides with Sedum mexicanum. All about what I write here are my beliefs, because nowhere in the liratuře mention of the possibility that S. mexicaum could be a hybrid of S. lineare x S.sediforme. This assumption led me to the relative similarity and possible co-occurrence of plants.

In conclusion we can say that Sedum mexicanum is for me a mysterious plant with even záhadnějším story.

sedum.cz © 2012

[View with PicLens]