Oregon Grape
The greatest service which can be rendered any country is to add a useful plant to its cultivation. – Thomas Jefferson
Oregon Grape, Mahonia aquifolium is a good example of Jefferson’s (1743-1826) oft-stated opening quote. This plant of contemporary usage was introduced as part of our country’s early botanical exploration.
Today we may add Oregon Grape to a list of more well-known evergreen shrubs such as rhododendron, mountain laurel, yew and pieris. Averaging 3 to 6-feet high and wide, its distinct alternate compound leaves are composed of 5 to 9 shiny, stiff, leaflets, each 1 ½-to-3 ½-inches long with spines on the tip and margin. Bright yellow, slightly fragrant flowers occur in mid-to-late April, about the same time as some of our flowering magnolias and cherries. Later in August-September these flowers may produce dark-blue berries, looking somewhat akin to grapes, hence the common name. Fruits may be used for jellies, wines and were historically part of traditional diets of indigenous Pacific Northwest peoples.
(more…)Flora Mount Auburn
We are excited to announce the public release of Flora Mount Auburn, our online plant collections database. For the first time, visitors can search our entire collection of trees, shrubs, perennials, and groundcovers….more than 15,000 plants!
Get a preview of FLORA with Samantha Richardson, Plant Records Manager:
Mount Auburn’s staff collaborated with Blue Raster, LLC, BG-BASE’s Mike O’Neal, and Brian Morgan with the Alliance for Public Gardens GIS (APGG) on the creation of FLORA MOUNT AUBURN.
This project was made possible in part by the Institute of Museum and Library Services (MA-30-17-0309-17).
Panicle Hydrangea, Hydrangea paniculata
It was late in September when you took me
To that amazing garden, hidden in the city,
Tranquil and complicated as an open hand, …
– May Sarton
For many of us, September, with its return of school-days, has become a de facto end of summer. One late-blooming plant, that always extends the lushness of summer flowers, well past Labor Day, is the Panicle Hydrangea, Hydrangea paniculata.
The genus Hydrangea, within the family HYDRANGEACEAE, includes over 70 species of flowering plants, native to south, and eastern Asia, and North, and South America. Hydrangeas are divided into three major groups of plants: vines; shrubs with the flower inflorescences as round, or conical clusters; and shrubs with flat-topped inflorescences. Hydrangea paniculata, with flowers in elongated, conical, terminal clusters, is native to China and Japan, and was introduced into western cultivation in 1861, by Philipp Franz von Siebold (1796-1866), German physician, and notable plant collector.
Ferns
Pokin’ round ‘mid ferns and mosses,
Like a hop-tail or a snail,
Somehow seems to lighten crosses
Where my heart would elsewhere fail.
– Anon.
Fossils indicate that ferns have existed for over 400 million years. Today worldwide there are identified more than 11,000 species, in 300 genera and 33 families. Among the most widespread forms of all plant life, they grow on every continent, in soil, on rocks, in trees, in deserts, as well as rainforests. They are also unique in having the greatest size variation of any form of plant life, from less than the size of your thumbnail, to 60-foot tall tree-ferns. Ferns were the first plants with a vascular system, allowing water and nutrients to be conducted from the soil, through the roots, and stem, to the leaves. Ferns reproduce without flowers or seeds, but rather through spores released into the air.
A few useful terms; frond is the whole fern leaf, both blade and stalk, blade is the leafy part of the frond, stipe is the stem of the frond below the blade, rachis is the portion of the stipe extending into the leaf blade, pinnae are the leaflets which may be lobed, or completely separated from each other, when the latter, the separate lobes are referred to as pinnules, and fiddlehead is the unfurling frond of any fern.
Ferns with a seeming delicate structure, adding to their lingering loveliness, are found throughout our landscape. Many are planted in the shade of Consecration Dell, others are combined with perennials and/or shrubs, and some are planted in sweeps within beds. All provide visual texture. The following are ten, of the over two-dozen, different species of ferns growing here.
One of our most conspicuous native New England ferns, Ostrich fern, Matteuccia struthiopteris, gets its name from its graceful, long, arching, lyre-shaped fronds, resembling an ostrich plume. The fronds are widest above their mid-length, and the stipe (stalk) has a deep groove. It is one of the few edible ferns, its fiddleheads, which may be cut and prepared like asparagus, are harvested in early spring each year.
The Sensitive fern, Onoclea sensibilis is un-fern like in appearance with its pale-green fronds that are broadly triangular, deeply lobed, and wavy-edged. The pinnae have a soft, plush-like texture, and are known to die back with the first frost. You will find these on Lawn Ave., Rosebay Ave., and other locations.
Royal fern, Osmunda regalis has leaves that resemble a black locust tree (Robinia pseudoacacia) and is often found in wet, swampy areas. The unusual clustering of spore-borne fertile pinnae, at the top of those fronds, reminds some of the floral shape of a sunflower or astilbe. Creating a vase form, 4-feet tall, these rich green fronds turn to a soft yellow in autumn. Look for this in Consecration Dell.
Hay-scented fern, Dennstaedtia punctilobulata has chartreuse-colored, lacy fronds, that grow singly, to about knee-high, and seem to align themselves to face the sun. This is one of the most common native ferns in New England, helped by the facts that it can grow in full sun (as well as dry shade), and it is not on the white-tailed deer’s menu. The soft fronds, squeezed between your fingers, feel slightly sticky, due to tiny white glandular hairs (look for them with a hand lens). Some, but not all, claim this fern to be hay-scented. These are growing in Consecration Dell, and numerous other locations.
Cinnamon fern, Osmunda cinnamomea takes its name not from fragrance, but from the cinnamon-colored hairs found covering its stipes, the axils of its pinnae at the rachis, and on the distinctly upright, mature, fertile fronds. Appreciated by birds, this “fern wool” or “fern cotton” is used by warblers, creepers, and other smaller birds in felting their nests. This fern grows in vase-like clusters, with each frond widest at, or just below the middle. In early spring, its emerging fiddleheads are covered with a dense, white pubescence. You will also find these in Consecration Dell.
Bracken fern, Pteridium aquilinum may form large, dense stands, even hip-high. It grows luxuriantly (some would say weedy) on several continents. The distinctive three-parted blades are highly dissected, and have a leathery feel. Historically, this was widely used for food, clothing, and shelter. Some Asian cultures ate the fiddleheads, although current medical knowledge strongly advises against this. Bracken fibers have been popular for weaving cloth, and various parts of the plant have been used as a dye. The dried stalks, bound together were used as thatch for rural cottages. You will find these between Asa Gray Garden and Bigelow Chapel, and other locations.
The New York fern, Thelypteris noveboracensis is native throughout eastern United States and Canada, despite the name. It grows in clumps of three or more fronds, each with a dark brown stipe. A more notable characteristic is that its diamond-shaped, fronds taper gradually at both top and bottom, with the lowest pinnae being very small. This notable double taper has been said to be like New Yorkers who “burn the candle at both ends.” You will find this on Oak Ave.
Northern maidenhair fern, Adiantum pedatum is a smaller fern, with a delicate, distinctive shape. Its thin black stipe divides into two arching, circular fans of fronds. Its light-green pinnules, which undulate in the slightest breeze, often have a ginkgo-shaped terminal pinnule. You will find these in Spruce Knoll.
Japanese painted fern, Athyrium niponicum ‘Pictum’ is one of the prettiest exotic species. It has a gray-green, shading to silver, tapered blade with contrasting wine-red rachis. Although perhaps only a foot tall, this is a fern that when used with perennials, creates numerous lovely plant-combinations. You will find these on Pearl Ave., among other locations.
Christmas fern, Polystichum acrostichoideshas rich, deep-green,, evergreen fronds, leathery to the touch. This is a clumping fern, adaptable to either moist or dryish sites. It may become a prostrate evergreen mat in winter. These will be found in Birch Gardens, Consecration Dell, and other locations.
On your next visit, stop and take a closer look at the many uncommonly lovely ferns enhancing our landscape.
“I bring you a Fern from my own Forest – where I play every Day.” -Emily Dickinson
…and we hid
in the chill twilight
face down hearing our breaths
our own breaths
full of the horizon
and the smell of the dew
on the cold ferns…
W. S. Merwin
Unfolding
By Sandra Shaffer VanDoren
Curled tight as a new- born’s fist,
the fern fronds unfurl slowly,
finger by finger in the
quiet spring sun, and lacy
hands reach out to touch the heat,
to tap gently on still air.
An infant on a blanket
nearby tries to raise her head,
which wobbles slightly on its
slender neck, a little like
a fern frond in a rare breeze,
as the baby stretches up,
already wanting to plunge
into this warm, green-laced world.
Her brother, aged two, squats by
the edge of the fern garden,
chatting like a small squirrel
in his rapid toddler-speak,
clearly trying to tell his
patient mother about the ferns,
their wavy fingers, the sun
and the worm he saw wiggling
around in the rich black earth.
The old woman sitting on
a bench close by watches them.
She sees the ferns uncurl their
fists, the baby lift her head,
the toddler exploring, and rejoices
that, even in her final years,
she can witness once more life’s
renewed possibilities.
