David,
I'm not sure exactly which species 'Two Moon's is derived from, but it woud be something closely related to
sabiatus I would imagine. There are some thugs amongst the
Convolvulus unfortunately, so care need to be taken in choosing them for ones that aren't so thuggish. I would avoid those which twine (the bindweed types) as they can smother things, but those allied to
sabiatus, while stoloniferous, tend to stay pretty flat and make a great groundcover. I can take some photos locally if you want to show you what they look like in full bloom?
Alisdair,
Some of my other "heaps" are....
numerous varieties of
Grevillea.....'
Bronze Rambler', '
Gaudi Chaudi', '
Royal Mantle' to name some of the older more established ones, but there are so excellent new varieties coming out bred by someone less than 50km from where I live.
Myoporum as mentioned previously here comes in a range of varieties. Thick or thin leaves types, white, pink or pinkish flowers, and purple leaves or stems on some varieties. The larger types end up looking like a huge rug that you just want to roll on.
There is a species of
Verbena with red flowers that is a wonderful flat groundcover. It isn't thick enough as a weed supressant, but it makes a lovely display, spreading metres on long flat stems. It did better before I came to this garden and started better watering.... I think it liked it drier and less looked after.
There are other ground cover Verbena types as well, but I think they benefit from more summer water?
Acacias have various species that now come in groundcover forms. Extremely hardy drought-wise, they make a permanent cover whereever they are, some up to 3 or 4 metres across. Some other Aussie genus with groundcover forms include
Kunzea,
Leptospermum and
Hardenbergia.
Trachelospermum jasminoides can be used as a groundcover, I have seen it used as such, although usually something like 30 or 40cm deep, but
T. asiaticum is the best for this. It doesn't want to climb, but rather sperads out laterally. It has creamy yellow flowers rather than the white of the former.
Some of the smaller pea species work well... think things like
Lathyrus laxiflorus (from memory?). I have seen it growing no more than 6 inches tall, spreading to about 1m across.
I'm really not sure exactly what scope this group has for summer watering, or whether the Mediterannean refers to stuff that will grow without extra summer water? The ones mentioned above should do well with little in the way of summer watering I think? The above are just off the top of my head, but I am sure I could come up with more or expand more on any of these if anyone is interested? I've also been thinking of things that just grow here for me, so they take moderate frost. I'm sure those in areas where they get colder in winter than me would have some problems with some of the things I mention. There's a whole bunch more that would thrive in milder areas as well, and that others with milder winters than me could grow that I can't.
I hope some of this is useful?