Cryptomeria fever

by Jonathan Damery, Editor of Arnoldia
April 6, 2018

Cryptomeria japonica pollen cones

Cryptomeria fever

Cryptomeria japonica pollen cones

Pollen cones of Japanese cryptomeria (Cryptomeria japonica 188-94*C), photo by Danny Schissler.

Cryptic flowers are often responsible for our sneezes. In Massachusetts, we have annual ragweed (Ambrosia artemisiifolia) to blame as one of the worst offenders. The small spikes of green flowers are so inconspicuous and drab, however, that it seems generations have attributed their runny noses in late summer and fall to more flamboyant suspects, like Canada goldenrod (Solidago canadensis), with its showy plumes of solar-hued flowers that illuminate roadsides.

Yet, sometimes, pollen allergies aren’t due to flowers at all, rather cones. In Japan, hay-fever season begins creeping north in late January, and the source for this early flush of runny noses is the Japanese cryptomeria (Cryptomeria japonica), otherwise known as sugi in Japan. Like all conifers, this large evergreen member of the cypress family (Cupressaceae) produces separate male and female cones. The male cones are small and abundant, massed between needles at the end of slender vegetative branches. The name cryptomeria refers to the concealed pollen-producing portion of these small cones, translating as “hidden parts” from Greek. Even so, if you walk along Conifer Path at the Arboretum this week, you can easily spot the tiny cones from afar on two specimens (accessions 838-53*A and 545-53*A), given the amber highlight they cast on the otherwise dark, lustrous contours of the trees. Each small branchlet can carry as many as thirty-five cones, and yes, if you flick your finger against even one, an eruption of yellow pollen is guaranteed.

Charles Sprague Sargent, the first director of the Arboretum, encountered “great planted forests” of cryptomeria when he visited Japan in the early 1890s. The lumber was used for all manners of construction, he noted, and the bark was stripped for roofing material. (He also noticed that spherical bouquets of cryptomeria branches were hung over the doors of sake vendors. Although Sargent didn’t elaborate, this ornament, called sugidama, originated because the wood is rot resistant and ideal for sake barrels.) The large plantations Sargent observed expanded significantly after World War II, when the government doled out subsidies in an effort to amp production of domestic lumber. This, of course, only heightened the pollen problem. By 1995, The New York Times ran a headline declaring the cryptomeria forests were a “man-made disaster,” and pollen forecasts have now become a regular and highly monitored news story in Japan.

Nonetheless, Sargent noted the extreme beauty of cryptomeria, claiming that only the giant sequoia (Sequoiadendron giganteum) could rival the stately grandeur of the finest specimens. So, at the Arboretum, before darting between the magnolias and cherries that are restless to burst into flower, take a moment to track down one of the most infamous conifers of spring—but, please, noses beware!

3 thoughts on “Cryptomeria fever

  1. I am trying to figure out exactly what is “cryptic” about Cryptomeria. I see that you refer to the small male cones. Missouri Botanical Garden Plant Finder says, ” meris meaning a part in reference to the flower parts being hidden.” Stearn’s Dictionary of Plant Names for Gardeners says, “meris, a part. All flower parts of this tree are concealed.” ( Neither of these makes sense to me, since conifers do not have flowers.) Finally, the American Conifer Society website says, “The name cyptomeria comes from the Greek language, translating as “hidden parts” referring to the manner in which the seeds are well hidden within the seed cones.” I would appreciate any expert help you could give me in sorting this out. Thank you for a very interesting article.

  2. Hi Katherine, thanks for your question! I checked into David Don’s original description of the genus in 1838. He describes hidden pollen-producing parts (thecae) on the male cones: “The thecae, five in number, are unilocular, very short, combined together in a single series, concealed at the base of the scales, and open inwardly towards the axis by a large aperture.” I think it’s safe to say that this is the feature that prompted the name, given that he didn’t stress the concealed nature of other features, and I’ve updated the blog text accordingly. See Annals of Natural History, vol. 1(3), pp. 233-234.

  3. Jonathan, thank you so much for following up. I do wish that there were a fill- in- the- blank for all plant names (including cultivar names!) to answer the question: Why was this particular plant name chosen? Barring that, the descriptions will have to do. And, I am swayed by your argument that the word “concealed” is only applied to the thecae, so that must be the feature that prompted the name Cryptomeria. Thank you very much for researching my question; next time I have a plant name etymology question I will go to tropicos.org and try to figure it out for myself, but it is wonderful to have the support of an expert.

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