Field Notes THE STACKS

Local Boy Makes Good

STT-80

First Sip:

Jepsonia flower
Blue Sky Ecological Reserve, California
(photo by Stickpen)


Slice of Cake:

A young couple named Martha Ann and William Jepson left Missouri,
riding a cattle-drawn covered wagon, heading west. This was 1857.
They settled near Alamo Creek in a 6-year-old township
called Vacaville, California.1,11

Over the years the Jepsons farmed their Vacaville homestead—
and started a family: They had three daughters and a son named Willis.
(Their fifth child, another little boy, was killed in horse riding accident.)1

William Jepson taught his children to work hard, and to help around the farm.
He believed reading and books were a waste of time.
His son Willis, on the other hand, loved books.
With the little money he had, he bought a second-hand set of novels
by Charles Dickens—a set he kept all his life.

Martha Ann Jepson, alternatively, taught the children a love for nature.

After graduating high school,
Willis Jepson traveled by train to Berkeley to take the college entrance exams there.
He was the first person from Vacaville ever to apply to the University of California.1

(Nowadays, the University of California system has ten campuses around the state.
But back in 1885 when Jepson was applying, there was only one University of California:
Berkeley.)

Jepson’s application was accepted.

Four years later, he was one of 35 men and 7 women graduating with a bachelor’s degree
in the University of California’s Class of 1889.1

Willis Jepson was then hired to teach at Berkeley. Along with teaching, he began
his own research—which included many plant-collecting trips around California.

In 1899, Jepson received the first PhD in Botany
that the University of California had ever awarded.1

Dr. Willis Jepson went on to teach botany at Berkeley for almost 40 years.

His field work covered most of the state
He was particularly fond of the
lesser-known deserts, mountains, and valleys.

– Alva R. Davis, et al 2

He would sleep under the stars
cook his meals over a fire, trespass and collect
where he wished—even in National Parks

– Richard G. Beidleman1

And speaking of national parks,
Willis Jepson visited Yosemite for the first time in 1890—the year it became a national park.
Two years later, in 1892, Jepson collaborated with John Muir and
Warren Olney, Sr. (the future Oakland mayor) and others to form the Sierra Club.1,13

Willis Linn Jepson with his plant press
in the Sierra Nevada in 1911

There’s no controversy about Jepson’s standing as scientist.

He’s well known for his accurate descriptions and
careful classifications of plants. And he described a lot of plants!
Willis Jepson himself named over 150 of California’s plant species.12

His success was, in part, simply timing.
David D. Keck notes that Jepson’s plant collecting trips
took place “when new species were yet to be found on almost every
mountain range and valley floor.”
12

He lookedwith the discriminating eye of the
master systematist, but also with the enthusiasm and
reverence of the naturalist and woodsman.

– David D. Keck
12

Accounts vary as to what Dr. Jepson was like as a teacher, and as a man.

In person, he was by turns gregarious and defensive.
He seemed to have been both a solitary wanderer, yet loyal to at least one friend.

Willis Jepson suffered from occasional mental breakdowns and he found that
the St Helena Sanitarium in Napa County was a tranquil retreat for him.
He wrote: “One finds there an atmosphere of peace, quiet, good cheer and hopefulness.”1

As a teacher, Jepson appeared to expect a lot of independent learning by his pupils.

Jepson was genial and friendly with his students,
but very formal and kept them at a distance

He frankly discouraged students who were not able to
pursue and solve their own problems by themselves

He almost never took a student into the field with him.
– Herbert L Mason
3

I read a very thorough, warm, and laudatory tribute article written
by Richard Beidleman soon after Willis Jepson’s death in 1946.

Among Beidleman’s praises and lists of Jepson’s accomplishments,
there was mention of a rivalry with a man named Herbert Mason.
Mason was a graduate student of Jepson’s who became a colleague, and
then later a replacement for Jepson—in both teaching and administration duties.
Jepson seems to have felt a deep and bitter rivalry with him.

In Jepson’s view,
this up-and-coming young botanist was beginning
to lure away Jepson’s graduate students

Until at long last Jepson swore that he never even wanted to
hear the name ‘Mason’ mentioned in his presence.

– Richard G. Beidleman
1

Herbert Mason wrote his own article about Jepson in 1947;
where, among other things, he calls him “one of the most colorful,
dramatic, and stormy figures in the history of California botany.”
3

Mason describes Jepson as an excellent scientist
someone who could be warm and friendly in person;
he loved to quote poetry, for example, especially Rudyard Kipling.
And Jepson certainly was a vivid storyteller recounting his
many adventures out in the field.

On occasion he was the most genial and gracious host,
a witty and charming companion.

– Herbert L Mason3

However, Mason also makes a point to say that Jepson had a side to him
which was solitary, paranoid and suspicious.

Jepson never married
He lived a singularly lonely life.

There were few, if any, of his fellow men whom he trusted.
His chief obsession was a fear that he would be
robbed of a rightful place in posterity.

The significant storms of his life were wholly within himself
a one-sided struggle between uncontrolled suspicions
and the charming, friendly Jepson.

– Herbert L Mason3

Sadly, it seems that Willis Jepson wasted energy worrying
about being wronged or forgotten; and therefore left his
most important and comprehensive book to be finished by others after his death.


The countless hours spent in brooding over
fancied wrongs cost him dearly in time and in energy and
robbed him of the vitality that he needed
to complete his life work.

– Herbert L Mason3

But Jepson did have at least one good friend.

He met Abby Waterman when she was a student at Berkeley,
around the time Jepson received his own doctorate degree.1

After she graduated from Berkeley in 1904,
Abby’s career as a botanist was cut short by her ill health, and she
returned to her family’s ranch near Barstow, California.1

Jepson first visited Abby at the Waterman Ranch in the spring of 1912.
He would return there regularly for the rest of his life:
both to relax, and to explore and collect plant specimens—often with Abby—
in the surrounding Mojave Desert, a landscape that fascinated him.
He once wrote that the open desert “caused my spirits to rise,
and at once I felt better in body as well as cheered and sustained in mind.”
1

Willis Jepson dedicated the second volume
of A Flora of California to Abby.

So, as a teacher and colleague, the reviews seem a bit mixed…
But what is clear is that Jepson’s main focus was never about teaching.
Mostly he concentrated on collecting plants for his herbarium

And on writing books!
Jepson published at least 11 books on California plants—
including two volumes of his ambitious A Flora of California.

Starting as early as 1894, Jepson meant A Flora of California to be
a comprehensive cataloging of all the native plants of California.
Richard Beidleman called it Jepson’s “perpetual goal” and his “magnum opus.”1
Jepson himself called it “a symbol of my life.”

It remained unfinished when he died in 1946.

To this day,
the University of California is still working to complete and update A Flora of California.
The university website describes it as a “botanical masterpiece” and a resource
that is “still much in demand by scholars.”4

Jepson’s ‘A Flora of California’ isa cornucopia of
information—gathered over Jepson’s lifetime—on the
plants of California in the early 20th century.
– from the book room at UC Berkeley4

A Flora of Californiais perhaps
the outstanding work on regional flora thus far
produced in this country
[It’s a] wealth of
field observation, ecological and geographical data,
profuse illustration, and
eminently sane taxonomic judgment.
– Alva R. Davis2

Jepson Prairie Reserve
(photo by Lobsang Wangdu)

Willis Jepson’s philosophy was to encourage everyone to take a slow,
careful look at our local trees and plants; and then add at least a little
knowledge through study—that we can add immeasurably to our lives
by gaining a better understanding of the living world around us.

Willis Jepson’s work lives on in collections at the university at Berkeley.
And his name lives on embedded in the geography and flora of his home state.

In California,
there is a mountain named after Willis Jepson;5
And a prairie meadow named after him;6
And a middle school;7 (more on that below)
And even a 600-year-old laurel tree.8


.


Linger Awhile:

I was thinking this week about growing up in Vacaville,
and how, at my high school, there was one class that I
absolutely loved: Botany.

Although both Willis Jepson and I attended pretty much
the only high school Vacaville had….
We went to school in different centuries!
Same town + different times = different schools.

[At the] newly-established
Normal and Scientific School in Vacaville

young Jepson encountered chemistry, geology, zoology

And then there was botany—
which included field trips and collecting.

– Richard G. Beidleman1

I graduated in 1979 from Vacaville High School
a school that didn’t exist until 1898.
Jepson graduated in 1885 from California Normal and Scientific School
A school that was torn down in 1890.9
(Too bad, though! Sounds kind of cool.)

Like Willis Jepson’s high school botany class,
my class gathered and identified native plants—
and then dried and glued into an herbarium.

One of his first preserved plant specimens was
a
Lepidium nitidum
(Common Peppergrass)
collected on March 6, 1884, probably around Vacaville.

– Richard G. Beidleman1

While we were working on our own herbariums, my botany class
went on a field trip to Berkeley—to see the Jepson Herbarium for ourselves.

Just one problem:
When we arrived at the university, we were told, “No. Sorry.
That collection is not open to the public.”

Luckily, my botany teacher was having none of it.

“Not only,” she stated, firmly,
“Did we just travel an hour on a bus to get here—but we’re from Vacaville!
Most of these kids went to Willis Jepson Junior High School!
You can’t now keep them out of the Willis Jepson Herbarium.”


We got in.


That teacher wasn’t lying.
Most of us had attended Jepson Jr High.
Including me. For grades 7, 8, and 9.


“Half Cup More”

Growing up in Vacaville, I knew a few people whose grandparents
had met Willis Jepson, in one way or another. Here are two of those stories…

The first is when Willis Jepson (who never gave much thought to private property lines)
was out on one of his plant-collecting trips, and was tramping through a Vacaville ranch.

According to my nephew’s grandfather—who owned the ranch—
Jepson saw a tree on their property and called it: “the largest live oak he’d ever seen.”
Long after Jepson’s death, the University of California continued to monitor that tree.10

The second is my friend’s grandfather knew Willis Jepson—though she’s not sure how…
Her grandmother went to Berkeley, but much later and didn’t study botany.
Her grandfather grew up in Vacaville, but was more than 10 years younger than Jepson.
But their family still has a signed copy of a book Jepson gave them in 1923.
Jepson inscribed a copy of The Trees of California to her grandfather: ‘with cordial friendship.’ 10

Willis Jepson is buried in the Pioneers Section of the old graveyard in Vacaville.
(I think his is the prettiest gravestone.)

“In the ordered beauty of nature he found
enduring communion”
(photo by me)


Take-Away Box


Thank you for reading!
Kelly J Hardesty

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© Kelly J Hardesty 2026

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