Nature Notes From Crater Lake
Volume 17, 1951
My Search for Botrychium
Pumicola
By Roy L. Rogers, Naturalist Assistant

"...delicate relative of the ferns with
tremendous root system." The dried, shrunken middle portion of
the stalk in the photograph appeared just above the surface of
the pumice in which the plant grew. Immediately beneath is the
bud containing next year's leaf, flanked on either side by the
dried remains of predecessors."
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In the acute appreciation of the value
and contribution of science towards modern life, the Westinghouse
Electric Corporation and Science Service of Washington, D.C., have
combined forces to ferret out talent of promise among graduating seniors
in high schools all over the United States. This is known as the Science
Talent Search that has been heralded in magazines and press. Basic
requirements are: (1) a superior and versatile high school record, (2) a
science aptitude test, and (3) study and performance of a significant
scientific project. The reward is a scholarship in a science major in an
American university of the contestant's choice.
I had been extremely interested in
entering this competition. Several projects passed through my mind
before I took a job to help the ranger naturalists in the park.
Immediately I was thrilled by the ideals of the National Parks and the
varied, exciting possibilities for a project at Crater Lake. There is
intense fascination in how plants came to the mountain after the climax
eruption, how they have adapted themselves to the vicissitudes of the
forbidding area, how they have succeeded in the various patterns that
exist today. Then came the story of Botrychium pumicola told by
one of the naturalists.
Here on the bleak summits of Llao Rock
and Cloudcap, both buried in pumice scores of feet deep, are plant
colonies and associations that have learned to get along in the intense
sunlight, desiccating winds, cold nights, and bitter exposure, plants
that because of their peculiar situation have acquired characteristics
more closely akin to those desert types than to those of Alpine-Arctic
members in similar high places. Here is found that delicate relative of
the ferns with a tremendous root system and a single depauperate leaf
that scarcely extends two inches above the soil: one of the rare plants
of the world whose natural growing area may not even be the total of one
acre.

"...scarcely to be discerned against the drab
background: Botrychium itself!" Approximately half life-size.
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Botrychium pumicola was
discovered on the high open slope of Llao Rock by Dr. Frederick V.
Coville, Chief Botanist of the U.S. Department of Agriculture in August,
1896. He discovered a second small colony on Cloudcap in 1902. Both of
these localities are about 8000 feet in elevation. These two tiny plant
islands were the only places in which the plant was known to grow until
Dr. L. R. Detling of the University of Oregon collected it in 1928 on a
summit just east of Paulina Peak near Newberry Crater. This is sixty
miles northeast of Crater Lake from which it is separated by a
pumice-covered surface of a lower and relatively flat elevation.
In this 1951 season that was early for
plant activities, it was almost August before my plans for a project
fully materialized. My initial search for the obscure plant was met with
frustration. It proved to be annoyingly evasive. I had expected to find
it sparse, but did not think that I should have to have my nose rubbed
into it to discover what it looks like in the field. My initial trips to
its home resulted in failure, but I would not give up. At last, when I
began to doubt its existence it yielded: there it was in an exclusive
and minute colony, perhaps fifty by twenty feet and resembling a
crescent in shape. Its color of glaucous-green in its prime blends well
with surroundings, and in the late season it had added a yellowish tinge
that further diminishes its visibility. The slope on which it grows is
gentle and close to the inside of the break that follows the crest of
the prominence. The colony is 300 feet west of the benchmark on the
summit that bears the legend, elevation 8046 feet. I noted in particular
its associates which are few in number of species. Chiefly there are
silver flower (Raillardella argentea), that odoriferous buckwheat
well remembered by its name, dirty socks, (Eriogonum pyrolaefolium
coryphaeum), and the interesting broom-rape (Orobanche
fasciculata franciscana) that is parasitic on the buckwheats and
polygonums.

"...a likely looking crescentic ridge..."
It was now my fascination to make the
trip to Newberry Crater to see if I could retrace Detling's discovery.
On September 7, I had my opportunity. On hands and knees, I scoured a
likely-looking crescentic ridge southeast of East Lake. The dried
remains of my friend
Orobanche proved to be the decisive lead. Sure enough, there it was,
its small and somewhat dried form scarcely to be discerned against the
drab background: Botrychium itself! The lineal spread of the
colony seemed great to me, being over 350 feet. In contrast, the
greatest width appeared to be no more than five feet. The precise
location of this colony is in T. 22 S., R. 13 E., Sec. 4. I ascended the
ridge on a course due east from the car that was parked alongside a
Forest Service section line marker that indicates that it is placed 350
feet south of the midpoint of the line between sections 4 and 5. To the
south and practically on the level with the car is a pass over which the
road winds and which is given an elevation of 7176 feet on the map. I
estimated our colony to be 300 to 500 feet higher. Later I learned that
Dr. Detling's collection was made on a summit west of the road.
From my high place, the summits of the
Cascades looked so near and alluring. Could it be that Botrychium
might find a home there, too? Little chance of such occurrence, but
nevertheless, there I wandered two days later. The first locality of
promise was the rounded top of Tumalo Mountain on which perches a Forest
Service fire-lookout at its apex, 7772 feet. The soil, though the
familiar fine pumice with a cover of coarse pumice- mulch, looked
somewhat different, having a reddish hue caused by an admixture of ash
of that color. The familiar indicators were there, but the most numerous
member of the colony was
Anemone globosa, that was absent in the other three localities in
which I discovered Botrychium. Here, as elsewhere,
Raillardella was the most encouraging lead. I scrutinized the whole
summit area on my hands and knees, hoping against hope that the small
treasure might be my reward. The entire dismal start of my search for
the fern passed through my mind's eye. It was so improbable, and the
efforts seemed so futile. But no! There it was: a single specimen
growing scarcely an inch above the ground 80 feet due north of the
lookout whose location is in T. 18 S., R. 9 E., Sec. 10. But despite
piercing search and dogged persistence, only one other plant could be
found, scarcely twenty feet away from the first specimen.

"...patch of Raillardella examined with tireless care."
In that afternoon of September 9, I
made a sortie up a likely-looking ridge leading northeast from Broken
Top. Higher and higher led the search, later and later grew the hour.
Each patch of Raillardella
was examined with tireless care. Already the highest elevation had been
passed at which the plant had been found elsewhere. Prospects and light
were growing dimmer, and an autumn chill gripped the darkening
landscape. It was imperative that I start down the grim crags. Then in
the gloom of faded light and hope, a single stem shimmered out of the
bare soil, attended by a complete circle of Raillardella, a few
feet in diameter. It was the capping triumph of my great day! The exact
locality of my find is T. 17 S., R. 9 E., Sec. 20, at an elevation of
over 8500 feet!
The collected specimens were pressed
and prepared for mounting. I sent the Cascade prizes and examples from
the other three localities for study and positive identification to Dr.
Robert Clausen of Cornell University, the celebrated expert on
OPHIOGLOSSACEAE to which
Botrychium belongs. I donated other specimens to the herbarium of
the University of Oregon which is under the direction of Dr. L. R.
Detling. A report of their conclusions should follow in a future number
of NATURE NOTES.