![]() |
| Mammillaria |
We come to the penultimate entry, labelled as an Echinocactus, when it clearly is a Mammillaria, replete with its ring of fruit. Gordon Rowley, of course, has this down as Mammillaria mammillaris and as I know and grow few Mammillaria's beside the most commonest ones, I'll agree with our former society chair here. Some real "comedy" here as the text claims that its a species of Lithops when you can plainly see its been bisected to show it internals. Gordon puts it much more succinctly, below.
This unusual picture shows examples of flowering plants on a scree or base of rocks, obviously indoors* for these are xerophytic plants which only thrive in hot dry climates.
**Echimilocactus is the name given to the round cactus in the centre, probably now called Echinocactus grusonii***. Echino means 'like a hedgehog' which is an apt designation. The spines are numerous and are arranged like white stars with a spacing reminiscent of the geometrical pattern found in fir cones and pineapples****. These spines protect the plant from animals but have the power of collecting any moisture that may be around and delaying transpiration from the epidermis, the thickened skin of the plant. There are deep ridges which help with the storage of water; the moist milky inside of the plant allows it to live a long time without rain, especially as it is an economical spherical shape. The red flowers and fruits***** are decoratively arranged around the plant's equator.
The white flower****** below the cactus is probably another example of a xerophyte in full flower, a daisy-like Lithops flower from South Africa. Lithops is a species of Aizoaceae; its name means 'like a stone'. It is indeed difficult to distinguish them from the stones and pebbles among which they grow, especially the Marmorata or marbled type.
According to the description written by Frankcom, the small succulents on the right came from America and had milky-white flowers and red pyramid-shape fruits. Most of the cacti came from tropical America and would have been collectors' pieces in the seventeenth century.
*My stupid brain thought that this would have been a sketch from real life, but it seems that its a copy of a copy of a painting by Commelijn. Rowley talks about an Orangery where this was grown and I'd hope there was some sort of bed and rock arrangement where these where grown, or at least some terracotta pots.
** Echimilocactus is a name I haven't heard before, and neither has the internet it seems. Maybe valid in the 18th century but not now.
*** So wrong, its Mammillaria mammillaris Ironically, although the golden barrel cactus is mentioned it's now in its own species as Kroenleinia rather than Echinocactus. A species I think is spectacularly ugly.
**** See Fibonacci for what is going on here, and yes, Mammillaria has tubercles rather than ribs so it works.
***** Only the fruits are red in this and Frankcom's description below of the plants is correct. The plant comes from the Caribbean islands and down into Venezuela and I wonder what the extent of it is in that benighted country.
****** Wrong its been cut in half to expose the stem and show how where the milky sap comes from. I have seen photos of cross sections of Lithops stems to show the leaves and stem as well. As for tropical America its more like the dry deserts of the Americas both south and north along with Mexico.





