Six on Saturday #56 (May 23, 2020)

oxalis-articulata-2
Oxalis articulata

File under things that are counterintuitive:  the Raleigh/Durham, North Carolina area, which I perceive as being fairly sunny year-round,  receives more than twice the annual rainfall of notoriously damp London, England.  Part of the answer to this apparent conundrum is that London has more drizzly days (RDU has 109 days with some precipitation vs London’s 164).  Furthermore, we tend to have tropical-like afternoon thunderstorms during the summer, so many of those 109 rainy days are mostly sunny with thirty or forty minutes of heavy rain around the evening rush hour.

But sometimes we do have prolonged wet periods.  The freeze warning two weeks ago proved to be a false alarm, but this week has also been cooler than normal.  It was the cool of clouds and heavy rain, though, not the chill of dry Canadian air driven south.  Between Monday night and Friday morning, we received 6 inches (~15 cm) of rain.  The garden is looking particularly lush, but some plants are a bit floppy after growing like crazy for a week under heavy cloud cover.

Despite several of this week’s Six on Saturday originating in South America, all are garden plants that grow outside in the ground year round.  Most of these photos were taken last Saturday, before the heavy rain.  They’d look a lot more bedraggled if I photographed them today.

1. Cypella herbertii subsp. brevicristata

herbertii-brevicristata
Cypella herbertii subsp. brevicristata

Cypella herbertii is a small iris-relative from Argentina and Uruguay.  I have previously written about C. herbertii subsp. herbertii, and everything I wrote about culture applies to this subspecies, too.  Technically, the two subspecies are distinguished by the length of the stigma lobes, but the two forms that I grow also differ in their color:  my T. h. brevicristata has flowers of a clear yellow, while those of my T. h. herbertii are more orange.  This is the first year that my T. h. brevicristata has flowered, so it will be interesting to see if I get a mixture of colors among the volunteer seedlings in future years.

herbertii-herbertii
For comparison, here is Cypella herbertii subsp. herbertii

2. Hippeastrum x johnsonii (St. Joseph’s lily)

Hippeastrum-johnsonii

I featured this hybrid in my very first blog post.  At that time, I was growing it in my greenhouse, but I have since transplanted it to several places in the garden.  The best clump grows in full sun beside the bird bath, in soil that stays damp year round. H. x johnsonii,  a cross of H. reginae (southern Brazil) and H. vittatum (Peru), was the first artificial Hippeastrum hybrid. Its name commemorates Arthur Johnson, an English watchmaker and horticultural enthusiast who first made the cross at the end of the 18th century.  Surprisingly, given the origins of the parent species, H. x johnsonii is reputed to be among the most cold-hardy and vigorous of all Hippeastrum hybrids.

3. Clematis ‘Rooguchi’ (?)

rooguchi

The first flower on a Clematis that I planted last autumn.  I’m not entirely sure that it is correctly labeled.  The flower looks right, but Missouri Botanical Garden’s Plant Finder says that C. ‘Rooguchi’ is a non-vining hybrid lacking the twining petioles that help the vining varieties climb.  My plant definitely has twining petioles and is enthusiastically climbing some deer fencing stapled to the pergola.  Some websites agree with MoBot, while others say ‘Rooguchi’ is a climber like my plant.  Perhaps there are several different clones of the same cross all going under the same cultivar name?

4. Foundation plantings

Rosa_and_Phlomis

A two-for-one entry.  Along the south-facing foundation of our house, I planted a row of Rosa ‘Home Run’ and a clump of Phlomis fruticosa (Jerusalem sage) which is slowly spreading to surround the roses.  The Home Run rose is single-flowered (which I like) but lacks fragrance (which I do not).  Most importantly, though, it is very resistant to blights and mildews during hot, humid weather.

Home-run

P. fruticosa is marginally hardy here, so planting along the south foundation gives it sun in winter and protection from cold north and east winds.  Even so, it doesn’t flower very well and is sometimes damaged by snow and ice sliding off the roof. I do like the foliage, though, and the contrast with the glossy rose leaves.

Phlomis-fruticosa

5. Oxalis tetraphylla ‘Iron Cross’

Oxalis-tetraphylla-1

O. tetraphylla is from central Mexico and is one of the Oxalis species that grow from little corms.  I received it as a freebie in a bulb order five or six years ago and decide to chance growing it in the ground.  So far, it has been well-behaved in the garden, tolerating freezing temperatures and showing no tendency to spread and become a weed like some Oxalis.

Oxalis-tetraphylla-2

6. Oxalis articulata (syn. O. crassipes)

oxalis-articulata

I found this plant growing on our property when we first moved into our newly built house.  O. articulata is a South American species with a long history in cultivation, so I suspect that like the Gladiolus ‘Eno Orange’ it may have been planted by previous owners of the land and survived the intervening years when the property was left fallow.  I have since dug it up and distributed the knobbly little rhizomes to several places in my garden.  O. articulata can apparently become mildly invasive in some climates, but my plant seems to be sterile, at least in the absence of another clone, and shows no inclination to spread on its own.

The Propagator is the host of Six on Saturday.  Head over there to see his Six and find links to the blogs of other participants.

Six on Saturday #54 (May 2, 2020)

The last ten days or so have been warm enough at night that I have finally felt confident to start moving tropical plants out to their summer quarters. The hummingbirds also arrived about ten days ago, and I have seen the year’s first aerial dogfights around the feeders.  Horticulturally, we have entered the “great green interlude,” the period after the peak of spring bulb and azalea flowering, but before the blooming of the summer perennials.  Although the first roses are opening, and there are still a smattering of bulbs and orchids flowering, the predominant color in my garden is the green of fresh new leaves.

1. Gladiolus x byzantinus

Gladiolus-byzantinus

A welcome splash of bright magenta comes from half a dozen Gladiolus x byzantinus bulbs that I received in a trade with a gardener in Texas last year.  This plant from southern Europe has been considered a synonym of G. communis, but Kew currently has it listed as a natural hybrid, G. dubius x G. italicus.  An old heirloom bulb in southern U.S. gardens, G. x byzantinus starts growing during the winter and blooms in spring, long before the hybrids derived from African species like G. dalenii.

2. Philadelphis inodorus (Appalachian mock orange, scentless mock orange) with unusual flowers

Philadelphus-6-petals
P. inodorus flowers with six petals

P. inodorus flowers typically have four petals, but this year I have a stem covered with six-petaled flowers.  The shrub originated as five or six seedlings that I grew in a single pot, so it is possible that the unusual flowers are produced by one of the seedlings, rather than by a single branch that has sported.  However, the plants are now inextricably tangled together, so the only way I’ll be able to propagate this weirdo (assuming it is stable) will be to root a cutting.

Philadelphus-4-petals
Typical P. inodorus flowers

3. Bletilla striata var. albescens

Bletilla-striata-alba

I purchased this orchid as Bletilla striata var. alba, but the flowers exhibit very faint lavendar coloration on the labellum.  Therefore, it would seem to be var. albescens, rather than var. alba which should have pure white flowers.  It does not seem to be as vigorous as the typical colored variety, but I think it has its own delicate charm.

4. Phlox nivalis (trailing phlox, pine phlox)

Phlox-nivalis

Moss phlox, P. subulata, is often sold by local nurseries as a native plant, but it is primarily a species of the northeast and midwest.  In North Carolina, P. subulata is found only in a couple of counties in the mountainous west of the state.  The superficially similar Phlox that grows throughout the piedmont is P. nivalis. I grew this one from a small cutting collected in Durham County.

5.  A couple of sages

Salvia-officinalis

Above, Salvia officinalis (culinary sage) in our herb garden.  Below, Salvia lyrata (lyreleaf sage), a common spring wildflower/weed.  Unlike S. officinalis, which grows as a semi-woody shrub, S. lyrata has a rosette of soft leaves that look vaguely like a dandelion.  I find S. lyrata particularly difficult to photograph, because its flowers stick out in all directions.

Salvia-lyrata

6. New plant bench

plant-bench-1

Last weekend, I built a wooden bench to house my pachypodiums and some of my tropical bulbs during the summer.  The bench is 7′ long x 4′ wide x 2′ high (2.1 x 1.2 x 0.6 m) and is constructed from pressure-treated pine.  It occupies the space formerly used for growing tomatoes, necessitating a search for a new place to grow that crop, but it should reduce spilled gravel and water damage on our wooden deck.

plant-bench-2

The Propagator is the host of Six on Saturday.  Head over there to see his Six and find links to the blogs of other participants.

Six on Saturday #53 (April 18, 2020)

This week started with the screech of a tornado warning emanating from every iphone in the house. We scrambled out of bed, turned on the TV, and saw that the putative tornado was a few miles southwest of us, tracking northeast.  Deciding that discretion is the better part of valor, we got the kids up and took shelter with the spiders in the crawl space.   Luckily, the storm broke apart before reaching us, so after a few minutes we were able to go back in for breakfast, a little soggy from the rain but otherwise unscathed.  Strong winds the rest of the day stripped most of the remaining flowers off the dogwoods but did no other damage to the garden.

After the storm on Monday, the rest of the week has been sunny and dry, though cool–we flirted with frost on Wednesday and Thursday morning, but even the volunteer tomato seedlings that are sprouting in the vegetable beds were unaffected.

1. Myrmecocattleya Memoria Louise Fuchs

M_mem_Louise_Fuchs

In the greenhouse, Myrmecocattleya Memoria Louise Fuchs is perfuming the air.  This orchid is a primary hybrid of Myrmecophila tibicinis, famous for its hollow pseudobulbs inhabited by ant colonies, and Cattleya bicolor, a very tall and spindly Brazilian biofoliate species.  This particular plant is actually the product of self-pollinating a first generation Myc. Memoria Louise Fuchs, but under the rules of orchid nomenclature, it retains the same grex name. Its pseudobulbs are relatively short and stout, like those of its Myrmecophila parent, while genes from C. bicolor have shortened the inflorescence.  Both species tend to have clustered flowers, but this plant has inherited fragrance and rich purple color from C. bicolor, and nicely crisped petals from M. tibicinis.  All in all, a good result of hybridizer’s efforts.

M_mem_Louise_Fuchs2

2. Rhododendron cf. periclymenoides

R_periclymenoides

I featured this deciduous azalea in a Six on Saturday last April, but the flowers then were not at their best.  I am almost sure that it is R. periclymenoides, the native pinxter flower.  I now have a second plant on the other side of the house–an R. alabamense that I purchased from a reputable source last autumn has also bloomed out as R. periclymenoides.

3. Rhododendron austrinum (Florida flame azalea)

R_austrinum1

Another North American deciduous azalea. This plant was in one of my earliest blog postings, but it is so lovely I couldn’t resist showing it again. The early butterflies love it.

R_austrinum 2

4. red azaleas

Wolfpack Red

Next up, two evergreen azalea hybrids.  Above is Rhododendron ‘Wolfpack Red’, one of the CarLa hybrids resulting from a collaboration between horticulture departments at North Carolina State University and Louisiana State University.  This clone is named for the NC State Wolfpack, whose colors are red, white, and black (but predominantly red).

Below is an unlabeled hybrid that I bought several years ago at Costco.  I really like the color of this plant–its red is at the orange end of the spectrum, unlike most red azaleas which have hints of pink or magenta.  I may try propagating it this year, but my success rate with Rhododendron cuttings is not high.  Maybe air layering would be better?

Red_Azalea

5. Narcissus ‘Thalia’

Narcissus_Thalia

Narcissus ‘Thalia’ is a century-old hybrid that was recommended by Scott Ogden in Garden Bulbs for the South (Timber Press).  This is my first year growing it, but I really like the gently nodding white flowers.  I hope it comes back next year.

6. Epimedium ‘Stoplights’

Epimedium_stoplights

I keep falling for pictures of spidery Epimediums in garden catalogs, and when they bloom I am always surprised by how tiny they are and how brief the flowering season is.  This one is no exception.

The Propagator is the host of Six on Saturday.  Head over there to see his Six and find links to the blogs of other participants.

Queen of the abyss

Sinningia_leucotricha

One of the common names of this species makes it sound like a demon in a medieval grimoire or a villain in a fantasy novel.  The alternative, Brazilian edelweiss, is more than a little twee.  Take your pick, or just refer to it as Sinningia leucotricha.

S. leucotricha grows as a lithophyte in Paraná State, often on cliffs and steep hillsides which presumably accounts for its picturesque English name (itself apparently a translation of the Portuguese rainha do abismo). Each deciduous stem, topped with four softly felted leaves, emerges from a massive tuber that enables the plant to survive long periods without water.  The bright orange flowers are produced in the spring, as the new stems mature, and bear all the hallmarks of hummingbird pollination.

I have been growing my S. leucotricha since 2001, and it is currently in a 8-inch (20 cm) diameter pot. The tuber hasn’t grown noticeably in the last five or six years, at least not above ground, and I suspect that it is long overdue for repotting.  It is potted in gritty, fast draining soil and is grown in the brightest part of my greenhouse, together with the Pachypodiums and other succulents.  Although some tuberous Sinningias are hardy in my garden, S. leuchotricha‘s long dry dormancy and habit of growing exposed at the surface would certainly make it a poor candidate for cultivating outside. For best appearance of the furry foliage, S. leucotricha should be protected from overhead watering, grown in the brightest light possible, and not overfertilized.

S. leucotricha has a definite growing schedule that must be respected.  My plant starts to go dormant in early autumn, at which point I stop watering entirely. Once the stems are completely dry, I snap them off.  The plant stays completely dry for several months, but I give it a little water in late January or February when I see fuzzy little bumps forming at the top of the tuber.  Once the stems are in full growth, I give it a thorough watering about once a week, allowing the pot to dry between waterings.  It blooms now, March into April, and after the flowers dry it doesn’t grow again until the next year.  The leaves stay green–well, white–all summer, and I continue watering, but the plant doesn’t visibly do anything.

Sinningia_leucotricha2

Dobo lily

Cyrtanthus_brachyscyphus

I’m particularly fond of orange flowers and flowers with tubular or bell-like form, so the Dobo lily, Cyrtanthus brachyscyphus…well, how could anyone not like this little bulb?

C. brachyscyphus is from South Africa, and its native range in the Eastern Cape and southern KwaZulu-Natal is bracketed by Port Elizabeth and Durban.  In nature, it is primarily a summer grower but may be evergreen if winters are mild [1].  In my greenhouse, it seems to prefer growing in the cooler late winter and early spring months–fresh new grass-like leaves are produced as soon as the days start getting longer in January, and it generally goes semi-dormant during the heat of summer.  This year, it has been flowering since early February, and new inflorescences are still appearing.   In common with other Cyrtanthus species, it seems to flower best when bulbs are crowded together in a pot, but overall it is much easier to grow and bloom than many of its congeners.  Although I grow it in my greenhouse, I suspect it would do equally well on a sunny windowsill.

Reference

1. Duncan, G., Jeppe, B., and Voight, L. (2016)  The Amaryllidaceae of Southern Africa, Umdaus Press, Pretoria, South Africa.