Search found 13 matches

by Detlev
Mon Dec 10, 2018 6:52 am
Forum: The Cactus & Succulent Plant Forum
Topic: (Another!) Gymno ID
Replies: 2
Views: 414

Re: (Another!) Gymno ID

Ralph Martin is right. The plant belongs to that group (Gymnocalycium subgenus Muscosemineum). It is a form of G. anisitsii (or G. damsii if you prefer). It is not G. friedrichii or G. mihanovichii. It is not easy to describe how to identify them. It is the flower and the stem (ribs, spination), but...
by Detlev
Fri Dec 07, 2018 9:52 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Gymno ID
Replies: 6
Views: 770

Re: Gymno ID

G. achirasense is closely related to G. horridispinum, and it is classified by some authors as a subspecies = G. horridispinum subsp. achirasense (and I agree).
by Detlev
Thu Dec 06, 2018 6:22 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Gymno ID
Replies: 6
Views: 770

Re: Gymno ID

The rough spination speaks for Gymnocalycium horridispinum. It is not G. marsoneri.
by Detlev
Sun Jul 08, 2018 9:20 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Disappointed
Replies: 12
Views: 1603

Re: Disappointed

As already written here by other forum members, Gymnocalycium monvillei is very variable and can have pure white flowers, but also those with pink hue. With its green bodies, bright yellow thorns and large flowers, it is one of the most beautiful Gymnocalycium species in nature and cultivation. The ...
by Detlev
Thu Feb 11, 2016 2:34 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Cactus botany books
Replies: 16
Views: 1606

Re: Cactus botany books

If you really want a technical book on the botany of cacti, I agree with Tony R: the "Cactus primer" of Gibson & Nobel is the best one available! I would recommend also "Cacti: Biology and Uses" of Park S. Nobel. ISBN 978-0520231573. When you have deeper interest in ecology and physiology, look for ...
by Detlev
Thu Jan 29, 2015 4:59 pm
Forum: Monthly Photo Competitions
Topic: January 2015, Transparencies
Replies: 8
Views: 3346

Re: January 2015, Transparencies

Not a transparent plant, but I like to add this photo here: It shows a seed of Astrophytum coahuilense, the deeply impressed hilum region covered by a thin, more or less transparent membran, which is already partly ruptured.
Astrophytum coahuilense.jpg
by Detlev
Sun Jan 11, 2015 2:45 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Cactus Identifying
Replies: 16
Views: 2456

Re: Cactus Identifying

I would agree with anders:
4 = Mammillaria bombycina
8 = Gymnocalycium anisitsii/damsii

12 = Gymnocalycium uebelmannianum
by Detlev
Wed Jan 07, 2015 10:47 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Cacti- stamp
Replies: 8
Views: 1238

Re: Cacti- stamp

Over the time many stamps with cacti have been printed in many countries. In most cases the cacti are not elements of the native flora of these countries, so these stamps were mainly produced for the paying collectors. And not all have such good images like the stamp with the Echeveria flower shown ...
by Detlev
Fri Jan 02, 2015 10:01 am
Forum: Genus Of The Month
Topic: December 2014 - Genus of the Month - Gibbaeum
Replies: 9
Views: 4042

Re: December 2014 - Genus of the Month - Gibbaeum

Gibbaeum pubescens subsp. shandii in nature