These two South African genera are very closely related, and are almost indistinguishable, different in the anatomy of the style. They are mostly from the western Cape Province, and grow in the winter, being dormant in the dry summer. They are starting to bloom now.
I thought I had several species of Hessea, but as each reaches maturity and blooms, they are all turning out to be Strumaria. To the left and above is Strumaria gemmata, a lovely little thing, with widely spaced umbels of jewel-like flowers that are creamy with a pale green center to each little petal. They sparkle like some of the California natives. Here is a closeup, although it is impossible to capture the detail and the sparkle.
Strumaria picta is more commonly seen, and is very different, with tight umbels of white flowers tinted pink. Here is a closeup, but it is also very small.
The species reputed to be the 'best' is Strumaria salteri, seen here below and to the right. It is a beauty, with pink flowers that are larger than those of most of the other species, but honestly, I think they are all really beautiful, and I couldn't pick a favorite myself.
Strumaria aestivalis blooms in the summer, and has hairy leaves, so it wasn't too hard to identify this species. Here it is to the left.
Another species that is more commonly seen is Strumaria truncata. This lovely Strumaria has a rather strange anatomical feature called a cataphyll, a sheath that emerges from the bulb that is usually deep red, and from which the leaves emerge. Of course, I didn't capture it on my picture! Here it is to the right.
The last named species I have in my collection (I have several unidentified ones) is Strumaria karooica. Here it is below, to the left.
I grow all my Strumarias in one gallon pots, and several mature bulbs will be comfortable in a pot that size, giving a very good display of their beautiful flowers. I use a sandy, well-drained mix, and keep them completely dry in summer. They set seed readily, but are fairly slow to mature from seed, usually needing at least five years to produce a flower, in spite of their small size. They are lovely, and well worth growing.