Specific Families and Genera > Cacti and Succulents

Orostachys question

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Kristl Walek:
Hello All,
I am trying to sort something out---and wonder if anyone could help.
I have received from several sources plants named as Orostachys spinosa
minima, sometimes O. minuta. I do not believe the former is a valid name,
but I can't find anything to back up my thinking. Is there such a thing?

I believe in fact the small plants I refer to are all O. thyrsifolia---

My plants are prostate, forming succulent mats, bloom is summer, same long
phallic flower stalk as O. spinosa.

O. minuta (which does seem to exist as a valid species) apparently blooms
late in the season (late fall)---so I do not think this is my
plant---although I have not been able to find a close-up picture of the
foliage anywhere.

It's the first time I have had seed of this small gem---and I need to put a
proper name to it.

And another question- I am trying to build up my collection of hardy succulents, and wonder if anyone here might grow any hard-to-come-by species of Orostachys or Rosularia. I have quite a collection already, and seed of the rarer sorts are very difficult to obtain.

Thank you,
Kristl

mark smyth:
In the 2007/2008 Plant Finder it only lists
O. furusei
O. furusei 'Grey Cloud'
O. spinosa

Kristl Walek:
Mark,
Whether or not some of these are valid names, they are distinct plants in my garden.


aggregata
boehmeri
erubescens
erubescens (dark form)
fimbriatus
iwarenge
'Jade Mountain'
limuloides (Green Form)
malacophylla
spinosa
spinosa minuta (valid?)
thrysiflora

Kristl

Carlo:
Kristl,

I share your deep interest in Orostachys and other hardy succulents. While at The New York Botanical Garden I accumulated a few species, but in my current position, have only O. furusei at the present time.

If my recollection serves me, there was a discussion of Orostachys names/taxonomy on Alpine-L some time ago.

Carlo:
Sorry all...somehow that post got sent before I was finished...(imagine!)

In my file on the genus, I have three references for Orostachys

1)  An article by Ben J. M. Zonneveld in Cactus & Co. titled, "Orostachys and Meterostachys in cultivation" (vol. IV (1), 2000).

2) the treatment of Osostachys from The European Garden Flora

3) "Generic and Infrageneric Classification of the Old World Sedoideae (Crassulaceae)" by Hideaki Ohba, published at Journ. Fac. Sci. Univ. Tokyo III, Vol 12, 1978.

One I do not have but would like to get is Ohba's newer article, Notes towards a monograph of the genus Orostachys (Crassulaceae) (1), Journal of Japanese Botany 65(7): 193-203 (1990).

With respect to your initial question, Ohba includes the following in Subsect. Appendiculatae: O. spinosus (the type species), O. fimriatus, O. japonicus, and O. minutus.

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