“Little” Hariyama

Looking quite lovely atop our crevice garden is Osmanthus heterophyllus ‘Hariyama’. This incredibly heavily-spined seedling of Osmanthus ‘Sasaba’ was brought to the US by plantsman Ted Stephens, who acquired it from Ishiguro Nursery in Japan. Our 15 year old plant has topped 10′ in height. Earlier in the fall, it was adorned with small, fragrant white flowers. Despite the small congested foliage, this is not a small plant, but where an oriental specimen plant is needed, this is very special.

Image Osmanthus heterophyllus 'Hariyama'
Osmanthus heterophyllus ‘Hariyama’

A Mound of Mitama

Cryptomeria is a monotypic genus (only one species) of conifer, native to Japan. Despite many reports that it hails from China, DNA has shown that these were brought from Japan and planted over 1000 years ago.

For over 40 years, we have been fascinated with the genus and have worked to collect as many cultivars as possible, currently 49 different ones in the garden. One of our long-time favorites is Cryptomeria japonica ‘Mitama’, an old Japanese dwarf selection that’s sold under the name ‘Globosa Nana’. Without any clipping, these retain a slightly informal green meatball shape, maturing at 6′ tall x 10′ wide. Below is our garden plant this week. Hardiness zone 5a to 9b.

An unpruned specimen of Cryptomeria japonica 'Mitama', commonly sold under the name 'Globosa Nana'.
Cryptomeria japonica ‘Mitama’

Winter Showstopper

Our 13 year old clump of the evergreen Japanese Asarum asperum is looking superb in the garden this week. Looks like it’s about time to divide this for the first time and start to build up stock so we can share in the future. Winter hardiness is Zone 6-9.

Image of Asarum asperum 'Showstopper' in the garden
Asarum asperum ‘Showstopper’

At the Coast with Holly

The typical holly fern, Cyrtomium falcatum, is considered fairly reliable in Zone 7b, but no further north. The oddball is the coastal form, which grows on the coast of both Japan and Korea. We received the plant shown below in 2005, as Cyrtomium falcatum var. maritimum, which our taxonomy staff tells me, isn’t a valid name. According to Patrick and Zac, the Japanese coastal material is correctly called Cyrtomium falcatum var. littorale, but there is no mention in the literature they’ve reviewed of the same coastal form occurring off Korea.

Other than the dwarf size, which is often seen in plants that grow in harsh coastal conditions, these weather-battered denizens adapt by developing thicker leaves and a denser habit. Additionally, this form is significantly more winter hardy than the typical material of Cyrtomium falcatum seen in the trade. We’ve always listed this dwarf form as a Zone 7a plant, but we wouldn’t be surprised at all if it’s also hardy in Zone 6. If you’ve been adventurous enough to try it, we’d love to hear from you. Our mature clumps below, photographed over Christmas, are now 8″ tall x 18″ wide.

Crytomium falcatum ‘Eco Korean Jade’

Pregnant Rohdeas

This is a very good year for the annual winter fruit show on Rohdea japonica (sacred lily). The attractive berries remain until early March, when they begin to drop. Although seed from these cultivars do not come true, you’ll always end up with an interesting variety of offspring.

Rohdea japonica ‘Get in Line’
Rohdea japonica ‘Shichi Henge’
Rohdea japonica ‘Golden Eggs’

A Melting Pot of Carex

We’ve published blogs about a number of carex from our rather large collection (108 species) several times this year, but here are a few more that look great here in early December. We have been fortunate to be able to collect members of this amazing genus from around the world, all of which now reside happily here at JLBG. As you can imagine, the majority of our collections are US native species, but just like with Homo sapiens, we value diversity and consequently don’t profile or discriminate based on ethnicity or origin.

The first is the US native Carex austrolucorum. This is Jeremy’s collection, named Carex ‘Tennessee Mop Top’.,

Carex austrolucorum 'Tennessee Mop Top'
Carex austrolucorum ‘Tennessee Mop Top’

Carex gentilis ‘Yushan’ is our collection from Taiwan, and the only fall-flowering carex we know. Duke Gardens has made stunning use of this in their magnificent Asian garden expansion.

Carex gentilis 'Yushan'
Carex gentilis ‘Yushan’

Carex ‘Silk Tassel’ is a stunning selection of the Japanese Carex morrowii var. temnolepis, brought to the US back in the 1970s by plantsman Barry Yinger. We still view this as one of the finest carex we’ve ever grown. While it grows great in shade, it truly excels in full sun, where its narrow variegated leaves appear silver.

Carex morrowii var. temnolepis 'Silk Tassel'
Carex morrowii var. temnolepis ‘Silk Tassel’

Sasanqua Satisfaction

We love the fall-flowering show of Camellia sasanqua, that’s underway now at JLBG. Here are a few of our favorites, starting with the amazing Camellia sasanqua ‘Fall Fantasy’. This hybrid from the late Chapel Hill camellia guru, Cliff Parks is unlike anything we’ve seen both in number of flowers as well as the incredible double pink form.

Camellia sasanqua 'Fall Fantasy' in full flower
Camellia sasanqua ‘Fall Fantasy’

Camellia sasanqua ‘Ginba’ is Japanese introduction with lovely frosted-tipped leaves. This is also a slower growing selection.

Camellia sasanqua 'Ginba'
Camellia sasanqua ‘Ginba’
Close up of the variegated foliage of Camellia sasanqua 'Ginba'
Camellia sasanqua ‘Ginba’

Camellia sasanqua ‘Leslie Ann’ is truly breathtaking. With a much more open habit, this cultivar is truly elegant. In form, it resembles a flowering cherry, far more than a camellia. This is an introduction from Alabama’s Ray Davis in 1960.

Close up of the flowers of Camellia sasanqua 'Leslie Ann'
Camellia sasanqua ‘Leslie Ann’
Open habit of Camellia sasanqua 'Leslie Ann'
Camellia sasanqua ‘Leslie Ann’

I’ll end up with another truly unique selection, also from the late Cliff Parks. Camellia sasanqua ‘William Lanier Hunt’ is the closest to blue flowers we’ve seen. Each pink flower has a blue cast that increases as the flowers age. This selection is named after the late NC plantsman of the same name.

Camellia sasanqua 'William Lanier Hunt' in bloom
Camellia sasanqua ‘William Lanier Hunt’
Camellia sasanqua 'William Lanier Hunt' in bloom
Camellia sasanqua ‘William Lanier Hunt’

Soooo Sweet!

Have you ever been seated by someone who exercised no self control when it came to their application of perfume to the point that they left you gasping for fresh air? Well, there’s a shrub with the same degree of insanely sweet scented flowers, Osmanthus heterophyllus ‘Kaori Hime’.

This fascinating Japanese selection of the Japanese/Korean/Taiwanese native shrub is renown for its tiny foliage as well as the multitude of tiny white flowers with an over-the-top perfume sweet fragrance. Our plant has been flowering for nearly a month…an incredible treat for the fall garden. Our 10 year-old specimens measure 7′ tall x 12′ wide…much larger than most on-line vendors indicate.

Osmanthus heterophyllus 'Kaori Hime' - a shrub with sweet scented flowers
Osmanthus heterophyllus ‘Kaori Hime’

Fifty Shades of Green

We love the various shades of green displayed by the fascinating Fatsia japonica ‘Murakumo Nishiki’. This amazing Japanese selection of tree ivy is looking rather stunning in the garden this month. This is a slow-growing shrub, which should mature at 4′ tall x 6′ wide. There is a shortage of these in commerce currently, because of a problem with tissue culture lab production. Winter hardiness is Zone 7b-10b.

Fatsia japonica 'Murakumo Nishiki'
Fatsia japonica ‘Murakumo Nishiki’

Slightly Deranged Hydrangeas

We love the genus Hydrangea, but are really fascinated by those at the far end of the family tree. While most hydrangeas flower in late spring, we actually have a couple flowering now we’d like to share.

The first is Hydrangea involucrata, a native to both Japan and Taiwan. The word “involucrata” indicates it has some serious involucres (the bracts surrounding the inflorescence). The first image shows the plant in bud, the second in full flower, and the third image is after the flower color has faded. All three stages are on display at once in the garden this week. They typically reach 6′ in height and width. Winter hardiness is Zone 6a-8b.

Hydrangea involucrata in bud
Hydrangea involucrata in bud
Hydrangea involucrata flowering
Hydrangea involucrata

Hydrangeas flowering
Hydrangea involucrata

Hydrangea amamiohshimensis (below), from Japan’s southern Ryuku Islands, was once considered a hydrangea cousin, until a 23andMe test confirmed it was actually a true hydrangea. Prior to the test, it belonged to the genus Cardiandra, which was effectively a perennial hydrangea, dying back to the ground each fall like most perennials. It too is in full flower in the woodland garden this week. Perhaps now that it has a recognizable name, more folks will be willing to grow it. This is the only one of the four former cardiandra species that has survived in our climate.

Hydrangea amamiohshimensis

Stoned Oak

Our 12 year-old stone oak, Lithocarpus glaber is looking fabulous this month, as it has come into full flower in early September. We love the stone oaks, which contrast to regular oaks in the genus, Quercus, by having upright insect-pollinated flowers, compared to wind-pollinated, drooping flowers in the genus Quercus, and by having exclusively evergreen foliage. Lithocarpus glaber is native to China, Japan, and Taiwan.

Lithocarpus glaber - Stone Oak
Lithocarpus glaber – Stone Oak

Simply Sublime

Looking particularly lovely in the late summer garden is Fatsia japonica ‘Murakumo Nishiki’. This irregularly gold variegated form of the typically solid green tree ivy is a star in the light shade garden. This evergreen gem is a great way to add a spot of color in the woodland garden year round. Hardiness is Zone 7b-10b.

Fatsia japonica 'Murakumo Nishiki'
Fatsia japonica ‘Murakumo Nishiki’

Frosty Pearl

One of our favorite broadleaf shrubs is undoubtedly Orixa japonica ‘Pearl Frost’. Orixa is a monotypic (one species) genus in the citrus (Rutaceae) family, that’s virtually unknown in US gardens.

We are particularly enamored with this superb variegated form, brought into the US by plantsman Barry Yinger. Orixa ‘Pearl Frost’ matures at 8′ tall x 6′ wide, and we have found it to thrive in both full sun to light shade, although full sun plants require more moisture.

Image of Orixa japonica Pearl Frost
Orixa japonica ‘Pearl Frost’